General Science 250 Questions

[11/09 9:34 pm] Basayya M Jamalur: General Science Objective Questions and Answers
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General Science questions and answers with tests for
practice free online. These questions not only develop of
your I.Q. but will useful for upcoming government exams
also.
1. Which of the following is the lightest metal ?
(A) Mercury (B) Silver
(C) Lithium (D) Lead (Ans : C)
2. The most important ore of Aluminium is–
(A) Bauxite (B) Calamine
(C) Calcite (D) Galena (Ans : A)
3. The element present in the largest amount in rocks and
minerals is–
(A) Carbon (B) Silicon
(C) Hydrogen (D) Aluminium (Ans : B)
4. The chemial name of Uria is–
(A) Aneurin (B) Chloroetane
(C) Carbamide (D) None of these (Ans : C)
5. Permanent hardness of water can be removed by
adding–
(A) Potassium Permanganate (B) Chlorine
(C) Bleaching Powder (D) Washing Soda (Ans : D)
6. The formula of Plaster of Paris is–
(A) CaSO 4 (B) CaSO 4 , 2H 2 O
(C) 2CaSO 4 , 4H 2 O (D) 2CaSO 4, H 2 O (Ans : D)
7. Liquefied Petroleum gas (LPG) consists of mainly–
(A) Methane, Ethane and Hexane (B) Ethane, Hexane and
Nonane
(C) Methane, Butane and Propane (D) Methane, Hexane and
Nonane (Ans : C)
8. The metal that is present in Photo Films is–
(A) Mercury (B) Platinium
(C) Magnesium (D) Silver ( Ans : D)
9. Which of the following is in liquid form at room
temperature ?
(A) Cerium (B) Sodium
(C) Francium (D) Lithium ( Ans : C)
10. The property of a substance to absorb moisture from
the air on exposure is called–
(A) Osmosis (B) Desiccation
(C) Efflorescence (D) Deliquescene ( Ans : D)
11. Brass gets discoloured in air due to the presence of
which gas in air–
(A) Carbon dioxide (B) Oxygen
(C) Hydrogen Sulphide (D) Nitrogen (Ans : C)
12. Quartz crystals normally used in quartz clocks etc. is
chemically–
(A) Sodium Silicate (B) Silicon dioxide
(C) Germenium dioxide (D) A mixture of (B) and (C) ( Ans : B)
13. Which of the following elements is non-radioactive?
(A) Uranium (B) Thorium
(C) Plutonium (D) Zirconium (Ans : D)
14. According to Dalton’s atomic theory the smallest
particle which can exist independently is–
(A) An atom (B) A molecule
(C) A cation (D) An anion ( Ans : A)
15. The recent atomic weight scale is based on–
(A) 1H1 (B) 1H2
(C) 6C12 (D) 8O16 (Ans : C)
16. The major ingredient of leather is–
(A) Carbohydrate (B) Collagen
(C) Polymer (D) Nucleic acid ( Ans : B)
17. Glass is made from the mixture of–
(A) Quartz and mica (B) Sand and salt
(C) Sand and silicates (D) None of these ( Ans : C)
18. Epoxy resins is used as–
(A) Moth repellants (B) Insecticides
(C) Detergents (D) Adhesives ( Ans : D)
19. One fathom is equal to–
(A) 6 metres (B) 6 feet
(C) 60 feet (D) 60 cms (Ans : B)
20. What is the unit for measuring the pitch or frequency of
sound ?
(A) Coulomb (B) Hum
(C) Cycles (D) Decible (Ans : D)
21. The fastest acting enzyme in the biological kingdom is–
(A) lipase (B) amylase
(C) carboxypeptidase (D) carbonic anhydrase ( Ans : D)
22. Lightening cause rainfall because–
(A) It cause combination of oxygen and nitrogen (B) Some
of the gas molecules become bigger
(C) It activate H 2 O molecule (D) Photo-electricity reaction
starts (Ans : C)
23. Nitrification means–
(A) Liquifaction of nitrogen (B) Convert the atmospheric
nitrogen to effective nitrogen compound.
(C) Production of nitrogen from air (D) Conversion of
nitrogen to nitric acid. (Ans : B)
24. Cell membrane is–
(A) permeable (B) selectively permeable
(C) semipermeable (D) impermeable ( Ans : C)
25. Polythene is industrially prepared by the polymerisation
of–
(A) methane (B) styrene
(C) acetylene (D) ethylene (Ans : D)
[11/09 9:35 pm] Basayya M Jamalur: General Science Objective Questions
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8 ] [ 9 ] [ 10 ]
General Science questions and qnswers with tests for
practice free online. These questions not only develop of
your I.Q. but will useful for upcoming government exams
also.
1. An alloy used in making heating elements for electric
heating devices is–
(A) Solder (B) Alloysteel
(C) Nichrome (D) German Silver (Ans : C)
2. German Silver is an alloy of–
(A) Copper, Silver and Nickel (B) Silver, Copper and
Aluminium
(C) Zinc, Copper and Nickel (D) Silver, Zinc and Nickel (Ans :
C)
3. Air is a/an–
(A) Compound (B) Element
(C) Mixture (D) Electrolyte (Ans : C)
4. Which of the following substance is a bad conductor of
electricity but a good conductor of heat?
(A) Asbestos (B) Celluloid
(C) Purspecks (D) Mica ( Ans : D)
5. Carborandum is–
(A) Silicon Dioxide (B) Silicon Carbide
(C) Silicon Nitride (D) Silicon Phosphide ( Ans : B)
6. Which of the following is the best conductor of
electricity ?
(A) Copper (B) Mica
(C) Zinc (D) Silver ( Ans : D)
7. Soda water contains–
(A) Nitrous acid (B) Carbonic acid
(C) Carbon dioxide (D) Sulphuric acid (Ans : C)
8. Which of the following is basis of the modern periodic
table ?
(A) Atomic mass (B) Atomic number
(C) Atomic size (D) Atomic volume ( Ans : B)
9. Of the following metals, which one pollutes the air of a
big city ?
(A) Copper (B) Cadmium
(C) Lead (D) Chromium ( Ans : C)
10. Bell Metal is an alloy of–
(A) Brass and Nickel (B) Zinc and Copper
(C) Tin and Copper (D) Nickel and Copper (Ans : C)
11. The high temperature superconductors are–
(A) Metal alloys (B) Ceramic oxides
(C) Inorganic polymers (D) Pure rare earth metals ( Ans : B)
12. The ingredients of Gun metal are–
(A) Iron, tin (B) Copper, tin
(C) Iron, brass, tin (D) Iron, zinc, titanium (Ans : B)
13. The neutral atom’s two isotopes differ in the number
of–
(A) Electron shells (B) Protons
(C) Valence electrons (D) Neutrons (Ans : D)
14. Optical fibres are mainly used in–
(A) Communication (B) Weaving
(C) Musical Instruments (D) Food Industry ( Ans : A)
15. The first synthetic fibre made by man was–
(A) Rayon (B) Nylon
(C) Polyester (D) Terycott (Ans : B)
16. Polythene is industrially prepared by the polymerization
of–
(A) Methane (B) Styrene
(C) Acetylene (D) Ethylene (Ans : D)
17. A mixture of water and alcohol can be separated by–
(A) Filtration (B) Evaporation
(C) Distillation (D) Decantation ( Ans : C)
18. A substance which changes readily into vapour without
heating is called–
(A) Efflorescent (B) Synthetic
(C) Volatile (D) Effervescent (Ans : C)
19. German biochemist, Emil Fischer–
(A) gave Operon model (B) compared the fit between
enzyme substrate to lock and key
(C) proposed the theory of competitive inhibition (D)
proposed the feed back inhibition theory ( Ans : B)
20. Enzymes generally have–
(A) same pH and temperature optima (B) same pH but
different temperature optima
(C) different pH but same temperature optima (D) different
pH and temperature optima (Ans : C)
21. Coenzyme is–
(A) always protein (B) often metal
(C) always inorganic compound (D) often a vitamin ( Ans :
D)
22. Cholesterol is one kind of–
(A) Saturated fatty acid (B) unsaturated fatty acid
(C) Steroid (D) Diglyceride (Ans : A)
23. Ethyl-alcohol is mixed completely with water. How ethyl
alcohol is separated from the mixture ?
(A) by separation flannel (B) by evaporation
(C) partial-distillation (D) evaporation of water ( Ans : C)
24. White vitriol is–
(A) FeSO 4 , 7H 2 O (B) ZnSO 4 , 7H 2 O
(C) MgSO 4, 7H 2O (D) CuSO 4, 7H 2 O ( Ans : B)
25. Combustion is a process by which–
(A) heat is produced (B) light is produced
(C) heat and light both are produced (D) None of these (Ans
: C)
[11/09 9:36 pm] Basayya M Jamalur: General Science Objective Questions
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General Science questions and qnswers with tests for
practice free online. These questions not only develop of
your I.Q. but will useful for upcoming government exams
also.
1. Which of the following is the best conductor of
Electricity ?
(A) Ordinary water (B) Sea water
(C) Boiled water (D) Distilled water ( Ans : B)
2. Balloons are filled with–
(A) Helium (B) Oxygen
(C) Nitrogen (D) Argon (Ans : A)
3. The charcoal used to decolourise raw sugar is–
(A) Animal charcoal (B) Sugar charcoal
(C) Cocoanut charcoal (D) Wood charcoal ( Ans : D)
4. Washing soda is the common name of–
(A) Calcium Carbonate (B) Calcium Bi-Carbonate
(C) Sodium Carbonate (D) Sodium Bi-Carbonate (Ans : C)
5. The filament of electric bulb is made of–
(A) Iron (B) Nichrome
(C) Tungsten (D) Graphite (Ans : C)
6. Bleaching powder is made from–
(A) Sulphur dioxide and gypsum (B) Chlorine and Charcoal
(C) Soda ash and lime (D) Lime and Chlorine (Ans : D)
7. Brass is an alloy of–
(A) Nickel and Copper (B) Copper and Silver
(C) Nickel and Zinc (D) Zinc and Copper (Ans : D)
8. The element required for Solar energy conversion–
(A) Beryllium (B) Silicon
(C) Tantalum (D) Ultra pure carbon (Ans : B)
9. Monazite is an ore of–
(A) Sodium (B) Titanium
(C) Thorium (D) Zirconium (Ans : C)
10. The gas usually causing explosions in coal mines is–
(A) Hydrogen (B) Carbon monoxide
(C) Air (D) Methane ( Ans : D)
11. Cotton fibers are made of–
(A) cellulose (B) starch
(C) proteins (D) fats (Ans : A)
12. Which of the following ores does not contain iron?
(A) Haematite (B) Magnetite
(C) Limonite (D) Cassiterite ( Ans : D)
13. Which variety of glass is heat resistant ?
(A) Hard glass (B) Flint glass
(C) Pyrex glass (D) Bottle glass (Ans : C)
14. Which of the following is used for removing air bubbles
from glass during its manufacture ?
(A) Fledspar (B) Arsenic oxide
(C) Potassium Carbonate (D) Soda Ash (Ans : B)
15. What are soaps ?
(A) Salts of silicates (B) Ester of heavy fatty acids
(C) Sodium or potassium salts of heavier fatty acids (D)
Mixture of glycerol and alcohol ( Ans : C)
16. In which following processes light energy is converted
into chemical energy ?
(A) Respiration (B) Fermentation
(C) Photosynthesis (D) Photorespiration ( Ans : C)
17. Cooking oil can be converted into vegetables ghee by
the process of–
(A) Oxidation (B) Hydrogenation
(C) Distillation (D) Crystallisation ( Ans : B)
18. Photosynthesis is–
(A) An exothermic process (B) An endothermic process
(C) A neutral process (D) A thermostatic process (Ans : B)
19. J. B. Sumner isolated first enzyme from Jackbeans as–
(A) amylase (B) trypsin
(C) urease (D) renin ( Ans : C)
20. Enzymes are absent in–
(A) fungi (B) bacteria
(C) viruses (D) algae (Ans : C)
21. The enzymes sucrase acts on–
(A) sucrose only (B) sucrose and starch
(C) all disaccharides (D) any organic monomer (Ans : A)
22. C.T. Scanning uses–
(A) Ultrasound waves (B) Gamma rays
(C) X-rays (D) None of the above (Ans : A)
23. Chemically ‘speropolenin’ is a / an–
(A) co-polymer of carotinoid and fatty acid (B) Carbohydrate
(C) Propene (D) Lactic acid ( Ans : A)
24. A mixture of salt and sand can be separated by–
(A) Sublimation (B) Dissolving water
(C) Gravity separation (D) Dry distillation (Ans : B)
25. PVC is obtained by the polymerisation of–
(A) propane (B) vinyl chloride
(C) styrene (D) Acetylene ( Ans : B)
[11/09 9:37 pm] Basayya M Jamalur: General Science Objective Questions
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General Science questions and qnswers with tests for
practice free online. These questions not only develop of
your I.Q. but will useful for upcoming government exams
also.
1. The most abundant metal in the earth’s crust is–
(A) Zinc (B) Copper
(C) Aluminium (D) Iron (Ans : C)
2. The gas used to extinguish fire is–
(A) Neon (B) Nitrogen
(C) Carbon dioxide (D) Carbon Monoxide (Ans : C)
3. In which of the following activities Silicon Carbide is
used ?
(A) Making cement and glass (B) Disinfecting water and
ponds
(C) Making castes for statues (D) Cutting very hard
substances (Ans : D)
4. The two elements that are frequently used for making
transistors are–
(A) Boron and Aluminium (B) Silicon and Germenium
(C) Iridium and Tungsten (D) Niobium and Columbium (Ans :
B)
5. Which of the following gas is not known as green house
gas ?
(A) Methane (B) Carbon dioxide
(C) Nitrous oxide (D) CFC ( Ans : C)
6. Which of the following is not a neutral oxide ?
(A) Carbon Monoxide (B) Sulphur Dioxide
(C) Water (D) Nitric Oxide ( Ans : B)
7. Potassium Permanganate is used for purifying drinking
water, because–
(A) It dissolves the impurities of water (B) It is a sterilizing
agent
(C) It is an oxidising agent (D) It is a reducing agent. (Ans :
C)
8. The presence of which of the following salts in water
causes corrosion in steam boilers ?
(A) Sodium Chloride (B) Magnesium Chloride
(C) Calcium bicarbonate (D) Potassium bicarbonate (Ans :
B)
9. Water is a good solvent of ionic salts because–
(A) It has no colour (B) It has a boiling point
(C) It has a high dipole moment (D) It has a high specific
heat ( Ans : C)
10. Nuclear fission is caused by the impact of–
(A) Proton (B) Electron
(C) Neutron (D) (A) and (b) (Ans : C)
11. Which is a good nuclear fuel ?
(A) Uranium – 238 (B) Neptunium – 239
(C) Thorium – 236 (D) Plutonium – 236 (Ans : C)
12. Long distance photography is facilitated by–
(A) Visible light (B) X-rays
(C) Infra Red rays (D) Ultra violet rays ( Ans : C)
13. Which of the following is used in making artificial
sweetener saccharine ?
(A) Benzene (B) Toluene
(C) Phenol (D) Aniline ( Ans : B)
14. Rayon is chemically–
(A) Glucose (B) Amylase
(C) Cellulose (D) Peptin ( Ans : C)
15. Which of following is used as a filter in rubber tyres?
(A) Graphite (B) Coal
(C) Coke (D) Carbon Black (Ans : D)
16. Which of the following substances exhibit the property
of sublimation ?
(A) Ice (B) Wax
(C) Camphor (D) Ethyl Alcohol (Ans : C)
17. Combustion is the process in which–
(A) Heat is produced (B) Light is produced
(C) Heat and Light is produced (D) None of these ( Ans : C)
18. The chemical used as a fixer in photography is–
(A) Borax (B) Sodium thiosulphate
(C) Sodium Sulphate (D) Ammonium persulphate (Ans : B)
19. Vitamins are–
(A) inorganic substances which cannot be synthesized by
animals
(B) inorganic by animals
(C) organic substances that cannot be generally synthesized
by animals
(D) organic substances which can be commonly
synthesized by animals ( Ans : C)
20. Richest source of vitamin B1 (thiamine) is–
(A) cod liver oil (B) curd
(C) whole bread meal (D) eggs ( Ans : C)
21. One of these vitamins is called erythrocyte maturation
factor–
(A) A (B) C
(C) K (D) B12 (Ans : D)
22. Saponification involves the hydrolysis of fats and oils
by–
(A) water (B) washing soda
(C) stearic acid (D) caustic soda ( Ans : D)
23. Photo-synthesis is a/ an–
(A) exothermic process (B) endothermic process
(C) a neutral process (D) a thermostatic process (Ans : B)
24. Which of the following is a physical change ?
(A) oxidation (B) reduction
(C) sublimation (D) decomposition ( Ans : C)
25. The process by which an organic compound breaks
down into simpler compounds on heating to high
temperature is known as–
(A) Aromatisation (B) Polymerisation
(C) Pyrolysis (D) Reduction ( Ans : C)
[11/09 9:38 pm] Basayya M Jamalur: neral Science questions and qnswers with tests for
practice free online. These questions not only develop of
your I.Q. but will useful for upcoming government exams
also.
1. The element common to all acids is–
(A) Oxygen (B) Hydrogen
(C) Nitrogen (D) Sulphur (Ans : B)
2. Gobar gas contains mainly–
(A) Methane (B) Carbon dioxide
(C) Butane (D) Carbon Monoxide ( Ans : A)
3. The most malleable metal is–
(A) Silver (B) Gold
(C) Aluminium (D) Sodium (Ans : B)
4. Which of the following is used in making smoke bombs ?
(A) Sulphur (B) Phosphorus
(C) Hydrogen (D) Carbon ( Ans : B)
5. Caustic Soda is–
(A) Nacl (B) Na2CO 3
(C) NaOH (D) NaHCO 3 (Ans : C)
6. Chemical formula of Water glass is–
(A) Na 2 SiO 3 (B) Al 2O 3
(C) NaAlO 2 (D) CaSiO 3 ( Ans : A)
7. The hardest substance available in earth is–
(A) Platinum (B) Silicon
(C) Diamond (D) Gold ( Ans : C)
8. Which of the following is the best conductor of
electricity ?
(A) Zinc (B) Copper
(C) Gold (D) Silver (Ans : D)
9. The ratio of pure gold in 18 carat gold is–
(A) 60% (B) 75%
(C) 80% (D) 100% ( Ans : B)
10. Which radioactive pollutant has recently drawn the
attention of the public due to its occurance in the building
materials ?
(A) Radium (B) Radon
(C) Thorium (D) Plutonium (Ans : C)
11. In an atomic explosion enormous energy is released
which is due to the–
(A) Conversions of neutrons into protons (B) Conversion of
chemical energy into nuclear energy
(C) Conversion of mechanical energy into nuclear energy
(D) Conversion of mass into energy (Ans : D)
12. Which of the following is used as a coolant in nuclear
reactors ?
(A) Heavy water (B) Cadmium
(C) Liquid sodium (D) Graphite ( Ans : C)
13. In vulcanization, natural rubber is heated with–
(A) Carbon (B) Sulphur
(C) Silicon (D) Phosphorus ( Ans : B)
14. Which type of fire extinguisher is used for petroleum
fire ?
(A) Foam type (B) Soda acid type
(C) Powder type (D) None of these ( Ans : C)
15. Which is/ are the important raw materials in cement
industry ?
(A) Limestone (B) Gypsum and Clay
(C) Clay (D) Limestone and Clay (Ans : D)
16. A mixture of iron filings and sand can be separated by–
(A) Heating (B) Sublimation
(C) Hand picking (D) Magnetic Separation ( Ans : D)
17. In which of the following process, Vanadium Pentoxide
is used as a catalyst ?
(A) Contact process (B) Haber process
(C) Solvary process (D) None of these ( Ans : A)
18. The rate of chemical reaction does not depend on–
(A) Concentration (B) Catalyst
(C) Temperature (D) Pressure (Ans : D)
19. The vitamin which can be synthesized in the gut by
bacterial action is–
(A) vitamin B 1 (B) vitmain B 2
(C) vitmain B 12 (D) All above (Ans : D)
20. Deficiency of vitamin D causes–
(A) rickets (B) beri-beri
(C) scurvy (D) night blindness (Ans : A)
21. Which one of the following is the best source of vitamin
A?
(A) Apple (B) Carrot
(C) Amla (D) Raddish ( Ans : B)
22. Which of the following is not a chemical reaction ?
(A) Burning of paper (B) Digestion of food
(C) Conversion of water into steam (D) Burning of coal (Ans
: C)
23. Which of the following is a chemical change ?
(A) Rusting of iron (B) Tempering of iron
(C) Melting of iron (D) Bending of iron (Ans : A)
24. Photoelectric effect was discovered by–
(A) Einstein (B) Hertz
(C) Bohr (D) Plank (Ans : A)
25. The hydrogenation of the vegetables oils takes place in
the presence of finely divided–
(A) aluminium (B) charcoal
(C) silica (D) nickel (Ans : D)
[11/09 9:40 pm] Basayya M Jamalur: General Science questions and qnswers with tests for
practice free online. These questions not only develop of
your I.Q. but will useful for upcoming government exams
also.
1. Tetraethyl lead is used as–
(A) Mosquito repellent (B) Pain Killer
(C) Fire extinguisher (D) Petrol additive (Ans : D)
2. Which of the following is used in beauty parlours for hair
setting ?
(A) Phosphorus (B) Sulphur
(C) Chlorine (D) Silicon (Ans : B)
3. Which of the following is a non-metal that remains liquid
in room temperature ?
(A) Bromine (B) Chlorine
(C) Helium (D) Phosphorus ( Ans : A)
4. Which of the following is not a bleaching agent?
(A) Sulpher di-oxide (B) Carbon di-oxide
(C) Sodium hypochlorite (D) Chlorine ( Ans : B)
5. The gas usually filled in electric bulb is–
(A) Hydrogen (B) Oxygen
(C) Nitrogen (D) Carbon di-oxide ( Ans : C)
6. Heavy water is–
(A) Tritium oxide (B) Deuterium oxide
(C) Rain water (D) Water at 4°C (Ans : B)
7. Cow milk is a rich source of–
(A) Vitamin A (B) Vitamin B 1
(C) Vitamin C (D) Vitamin D (Ans : B)
8. The element found in the surface of the Moon is–
(A) Tin (B) Tungsten
(C) Tantalum (D) Titanium (Ans : D)
9. The average salinity of sea water is–
(A) 2% (B) 3%
(C) 2.5% (D) 3.5% ( Ans : D)
10. The isotope of Uranium capable of sustaining chain
reaction is–
(A) U 235 (B) U 238
(C) U 239 (D) None of these (Ans : A)
11. Radioactive disintegration of Uranium ultimately results
in formation of–
(A) Radium (B) Thorium
(C) Polonium (D) Lead (Ans : D)
12. Atom bomb is made on the basis of–
(A) Nuclear fusion (B) Nuclear fission
(C) Both (A) and (B) (D) None of these ( Ans : B)
13. Which of the following is the petroleum wax ?
(A) Bees wax (B) Carnauba wax
(C) Paraffin wax (D) Jojoba wax ( Ans : C)
14. Which of the following fibres is generally preferred for
making gauze and lint ?
(A) Cotton (B) Rayon
(C) Nylon (D) Terylene (Ans : B)
15. Rubber is coagulated from latex by adding–
(A) Hydrochloric acid (B) Acetic acid
(C) Sulphuric acid (D) Carbonic acid (Ans : B)
16. Which of the following metals can displace hydrogen
from dilute acids ?
(A) Zinc (B) Gold
(C) Copper (D) Silver (Ans : A)
17. Reaction of alcohol, with carboxylic acid is known as–
(A) Substitution reaction (B) Addition reaction
(C) Esterification (D) Hydrogenation (Ans : C)
18. Saponification involves the hydrolysis of fats and oils
by–
(A) Water (B) Washing soda
(C) Stearic acid (D) Caustic acid (Ans : D)
19. Ascorbic acid is–
(A) Vitamin K (B) Vitamin B
(C) Vitamin A (D) Vitamin C ( Ans : D)
20. Sterility in some animals is caused due to deficiency
of–
(A) vitamin B (B) vitamin D
(C) vitamin B 12 (D) vitamin E (Ans : D)
21. At the boiling temperature an enzyme becomes–
(A) killed (B) denatured
(C) uneffected (D) inactivated (Ans : B)
22. The penetrating power is maximum in–
(A) a-rays (B) b-rays
(C) g-rays (D) cathode rays (Ans : A)
23. Which of the following rays carry no charge ?
(A) Cathode rays (B) X-rays
(C) a-rays (D) Positive rays (Ans : B)
24. An atom bomb is based on the principle of–
(A) Chemical reaction (B) Chain reaction in the form of
fission
(C) Nuclear fusion (D) None (Ans : B)
25. In which of the following processes light energy is
converted into chemical energy ?
(A) Respiration (B) Fermentation
(C) Photosynthesis (D) Photorespiration ( Ans : C)
[11/09 9:41 pm] Basayya M Jamalur: More Science Questions : [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 6 ] [ 7 ] [
8 ] [ 9 ] [ 10 ]
General Science questions and qnswers with tests for
practice free online. These questions not only develop of
your I.Q. but will useful for upcoming government exams
also.
1. From which mineral is radium obtained–
(A) Limestone (B) Haematitie
(C) Pitchblende (D) Rutile ( Ans : C)
2. What is laughing gas ?
(A) Carbon dioxide (B) Sulphur dioxide
(C) Nitrogen Dioxide (D) Nitrous oxide ( Ans : D)
3. Which of the following is used as a material for making
protective windows in space probes ?
(A) Steel (B) Graphite
(C) Tungsten (D) Diamond (Ans : D)
4. The gases used in different types of welding would
include–
(A) Oxygen and Hydrogen (B) Oxygen, acetylene and argon
(C) Oxygen and acetylene (D) Oxygen, hydrogen and
nitrogen ( Ans : C)
5. Which of the following alloys is used for making
magnets ?
(A) Duralumin (B) Stainless Steel
(C) Alnico (D) Magnelium ( Ans : C)
6. Parmanent hardness of water may be removed by the
addition of–
(A) Alum (B) Sodium Carbonate
(C) Lime (D) Potassium Permanganate (Ans : B)
7. Which of the following is the most stable element?
(A) Uranium (B) Hydrogen
(C) Oxygen (D) Lead (Ans : D)
8. Find the odd one ?
(A) Marble (B) Chalk
(C) Lime Stone (D) Slaked Lime (Ans : D)
9. Diamond is harder than graphite because of–
(A) Difference of layers of atoms (B) Tetrahedral structure
of diamonds
(C) Difference of crystaline structures (D) None of these
(Ans : C)
10. Which of the following has least penetrating power?
(A) Alpha particles (B) Beta particles
(C) Gamma particles (D) All have same power ( Ans : A)
11. What is increasing order of the wave lengths of the
following colours–
1. Orange 2. Indigo 3. Yellow 4. Violet
(A) 1, 2, 3, 4 (B) 3, 4, 1, 2
(C) 4, 3, 2, 1 (D) 4, 2, 3, 1 ( Ans : D)
12. Atoms are composed of–
(A) Electrons only (B) Protons only
(C) Electrons and Protons (D) Electrons and Nuclei (Ans : D)
13. Paper is manufactured by–
(A) Wood and resin (B) Wood, Sodium and Bleaching
powder
(C) Wood and bleaching powder (D) Wood, Calcium,
hydrogen sulphate and resin (Ans : D)
14. Which synthetic fibre is known as artificial silk ?
(A) Cotton (B) Rayon
(C) Terylene (D) Nylon (Ans : B)
15. Deep blue colour is imparted to glass by the presence
of–
(A) Iron oxide (B) Cupric oxide
(C) Nickel oxide (D) Cobalt oxide ( Ans : D)
16. Which of the following gases is obtained by the reaction
of water with Calcium Carbide ?
(A) Acetylene (B) Ethylene
(C) Methane (D) Water gas ( Ans : C)
17. The gas liberated during the reaction of copper with
dilute nitric acid is–
(A) NO 2 (B) N 2 O 5
(C) O 2 (D) NO ( Ans : D)
18. Which of following substances undergoes chemical
change on heating ?
(A) Sodium Chloride (B) Silica
(C) Lead Nitrate (D) Platinum wire ( Ans : C)
19. Starch hydrolysing enzyme is–
(A) sucrose (B) invertase
(C) amylase (D) cellulase ( Ans : C)
20. The enzyme used for the formation of RNA on DNA is–
(A) DNA polymerase (B) endonuclease
(C) topoisomerase (D) RNA polymerase (Ans : D)
21. The term ‘enzyme’ was coined by–
(A) de Duve (B) Kunhe
(C) C. Darwin (D) de Candolle (Ans : B)
22. A plant cell differs from an animal cell in the absence
of–
(A) mitochondria (B) centrioles
(C) ribosomes (D) endoplasmic reticulum (Ans : B)
23. A Vitamin, the absence of which leads to sterility in both
males and females is–
(A) Vitamin K (B) Vitamin C or ascorbic acid
(C) Vitamin D or calciferol (D) Vitamin E or tocopherol (Ans :
D)
24. Anaemia is caused in man due to the deficiency of–
(A) folic acid (B) vitamin A
(C) vitamin B 12 (D) none ( Ans : A)
25. Rusting of iron involves–
(A) oxidation (B) reduction
(C) decomposition (D) displacement ( Ans : A)
[11/09 9:41 pm] Basayya M Jamalur: eneral Science questions and qnswers with tests for
practice free online. These questions not only develop of
your I.Q. but will useful for upcoming government exams
also.
1. Which form of phosphorus is used in safety metals?
(A) Red Phosphorus (B) White Phosphorus
(C) Yellow Phosphorus (D) Black Phosphorous (Ans : A)
2. Stainless steel is an alloy of–
(A) Iron, Carbon and Nickel (B) Iron and Manganese
(C) Iron, Chromium and Zinc (D) Iron, Chromium and Nickel
(Ans : D)
3. Which of the following is not correctly matched ?
(A) Galena : Lead Sulphide (B) Green vitriol : Copper
sulphate
(C) Plaster of Paris : Calcium sulphate (D) Calomel :
Mercurous Chloride ( Ans : B)
4. Potassium nitrate is used in–
(A) Salt (B) Glass
(C) Fertiliser (D) Medicine (Ans : B)
5. In which type of rocks are metals like Gold and Copper
mostly found ?
(A) Old igneous (B) Old sedimentary
(C) Old metamorphic (D) New metamorphic (Ans : A)
6. Which of the following gases is lighter than air ?
(A) Carbon dioxide (B) Oxygen
(C) Ammonia (D) Chlorine (Ans : C)
7. A super conductor is characterised by–
(A) Zero permeability (B) Low permeability
(C) High permeability (D) Infinite permeability (Ans : A)
8. Of the various forms of carbon, which one is used for
absorption purpose ?
(A) Diamond (B) Graphite
(C) Coke (D) Wood Charcoal (Ans : D)
9. The main constituents of Pearl are–
(A) Calcium Carbonate, Magnesium Carbonate (B) Calcium
oxide, Ammonium Chloride
(C) Argonite , Chonchiolin (D) Ammonium Sulphate, Sodium
Carbonate ( Ans : A)
10. The age of most ancient geological formation is
estimated by–
(A) Potassium-Argon method (B) Ra-Si method
(C) C14 method (D) Uranium-lead method ( Ans : C)
11. Which of the following is used as a moderator in nuclear
reactor ?
(A) Ordinary water (B) Radium
(C) Thorium (D) Graphite ( Ans : D)
12. Isotopes are separated by–
(A) Filtration (B) Sublimation
(C) Distillation (D) Crystalization ( Ans : C)
13. The combustible material at the tip of a safety match
stick is–
(A) Sulphur (B) Manganese dioxide
(C) Phosphorus (D) Antimony sulphide ( Ans : D)
14. Which of the following roofs provide better protection
against fire ?
(A) Cement slab (B) Asbestos sheet
(C) Reinforced concrete (D) None of these ( Ans : B)
15. The material used for bleaching paper pulp is–
(A) Chlorine (B) Caustic soda
(C) Sodium Hypochlorite (D) Lime (Ans : C)
16. Water is neither acidic nor alkaline because–
(A) it cannot accept or donate protons (B) it boils at high
temperature
(C) it can dissociate into equal number of hydrogen ions (D)
it cannot donate or accept electrons ( Ans : C)
17. PVC is obtained by the polymerisation of–
(A) Propene (B) Vinyl Chloride
(C) Styrene (D) Acetylene ( Ans : B)
18. Which of the following metals can displace zinc from a
solution of zinc sulphate ?
(A) Lead (B) Magnetism
(C) Iron (D) Mercury (Ans : B)
19. Which set of conditions represents easiest way to
liquify gas ?
(A) Low temperature, high pressure (B) High temperature,
low pressure
(C) Low temperature, low pressure (D) High temperature,
high pressure ( Ans : A)
20. Artificial rain is caused by spraying small pellets of
which of the following over clouds ?
(A) Ice (B) Dry Ice
(C) NaOH (D) NH 4Cl (Ans : C)
21. Galvanisation is deposition of–
(A) Zinc of iron (B) aluminium on Iron
(C) tin on iron (D) copper on iron ( Ans : A)
22. Antibiotics are drugs used for the cure of–
(A) Bacterial diseases (B) Cancer
(C) Malaria (D) Nervous disorders (Ans : A)
23. Blood does not coagulate inside the body due to the
presence of–
(A) haemoglobin (B) heparin
(C) fibrin (D) plasma (Ans : B)
24. Blood pressure is dependent on–
(A) systolic force (B) cardiac output
(C) peripheral resistance (D) all of these ( Ans : D)
25. LPG contains–
(A) Butane and isobutene (B) Butane and Propane
(C) Isobutane and Propane (D) Butane, Isobutane and
Propane ( Ans : B)
[11/09 9:43 pm] Basayya M Jamalur: General Science questions and qnswers with tests for
practice free online. These questions not only develop of
your I.Q. but will useful for upcoming government exams
also.
1. Which of the following metals forms an amalgum with
other metals ?
(A) Lead (B) Tin
(C) Zinc (D) Mercury (Ans : D)
2. Which of the following is not an ore of Aluminium?
(A) Felsper (B) Bauxite
(C) Cryolite (D) Azurite (Ans : D)
3. Most soluble in water is–
(A) Camphor (B) Sugar
(C) Sulphur (D) Common Salt ( Ans : B)
4. Which of the following is used as lubricant ?
(A) Graphite (B) Silica
(C) Diamond (D) Iron Oxide ( Ans : A)
5. The purest form of iron is–
(A) Steel (B) Pig iron
(C) Cast iron (D) Wrought iron (Ans : D)
6. The percentage of carbon is the least in–
(A) Grey cast iron (B) Wrought iron
(C) White cast iron (D) Steel (Ans : D)
7. An element that does not occur in nature but can be
produced artificially is —
(A) Thorium (B) Radium
(C) Plutonium (D) Uranium ( Ans : C)
8. The inert gas which is substituted for nitrogen in the air,
used by deep sea drivers for breathing is–
(A) Helium (B) Argon
(C) Krypton (D) Xenon (Ans : A)
9. The group of metals Fe, Co, Ni may be best called as–
(A) Alkali metals (B) Rare metals
(C) Main group metals (D) Transition metals (Ans : D)
10. Who suggested that the most of the mass of atom is
located in nucleus ?
(A) Bohr (B) Thomson
(C) Rutherford (D) Avogadro (Ans : C)
11. Meson particles are found in–
(A) R-rays (B) X-rays
(C) Laser beam (D) Cosmic rays (Ans : D)
12. An atom of an element with mass number 23 and
atomic number 11 will have–
(A) 11 neutrons, 12 protons and 11 electrons (B) 11
protons, 12 neutrons and 11 electrons
(C) 11 protons, 12 electrons and 11 neutrons (D) 23 protons
and 11 electrons (Ans : B)
13. Which of the following is a protein ?
(A) Wool (B) Starch
(C) Natural rubber (D) Cellulose (Ans : C)
14. Soap is a mixture of sodium or potassium salts of—
(A) Monocarboxylic acid (B) Glycerols
(C) Dicarboxylic acid (D) Tricarboxylic acid (Ans : A)
15. Which of the following material is used to prepare blue-
black ink ?
(A) Gallic acid (B) Tannic acid
(C) Ferrous sulphate (D) All of these ( Ans : D)
16. Water gas is prepared by passing–
(A) Steam over white hot coke (B) Air over red hot coke
(C) Methane over red hot coke (D) Steam over heated
sulphur (Ans : A)
17. Which of the following metals react with nitrogen to
form nitride ?
(A) Sodium (B) Potassium
(C) Magnesium (D) None of these (Ans : C)
18. One micron is equal to–
(A) 1/10th of mm (B) 1/100th of mm
(C) 1/1000th of mm (D) 1/10000th of mm ( Ans : C)
19. Equal volumes of different gases at any definite
temperature and pressure have–
(A) Equal weights (B) equal masses
(C) equal density (D) equal no. of molecules (Ans : D)
20. Milk is an example of–
(A) suspension (B) true solution
(C) emulsion (D) gel (Ans : C)
21. Which of the following modes of expressing
concentration is independent of temperature–
(A) Molarity (B) Molality
(C) Normality (D) Formality ( Ans : B)
22. Which of the following substances undergoes chemical
change on heating ?
(A) Sodium chloride (B) Silica
(C) Lead nitrate (D) Platinum wire (Ans : C)
23. Vulcanisation is a–
(A) Science of studying volcanoes
(B) method of degrade polymers
(C) Process connected with the making of voltaic cells
(D) Process of hardening of rubber by heating it with
sulphur. ( Ans : D)
24. Water gas is prepared by passing–
(A) steam over white-hot coke (B) air over red-hot coke
(C) methane over red-hot coke (D) steam over heated
sulphur (Ans : A)
25. The hormone which stimulates milk production in
mammal is known as–
(A) Glucagon (B) prolactin
(C) progesterone (D) oestrogen (Ans : B)
[11/09 9:44 pm] Basayya M Jamalur: General Science questions and qnswers with tests for
practice free online. These questions not only develop of
your I.Q. but will useful for upcoming government exams
also.
1. Bromine is–
(A) colourless gas insoluble in water (B) A highly
inflammable gas
(C) A Black solid. (D) A red liquid. (Ans : D)
2. The metal used in storage batteries–
(A) Iron (B) Copper
(C) Lead (D) Zinc (Ans : C)
3. Water has maximum density at–
(A) -4°C (B) 0°C
(C) 4°C (D) 100°C ( Ans : C)
4. The colour of Emerald is–
(A) Violet (B) Yellow
(C) Deep Green (D) Prussian Blue (Ans : C)
5. Permanent hardness of water, due to sulphates of the
metal, can be destroyed by the use of–
(A) Nitrates (B) Zeolites
(C) Sulphonates (D) None of these ( Ans : B)
6. Rust is–
(A) A mixture of Fe 2O 3 and Fe(OH) 2 (B) A mixture of FeO
and Fe(OH) 2
(C) FeO only (D) A mixture of Fe 2O 3 , 3H 2 O and FeO (Ans :
D)
7. Which of the following characters is not shown by
hydrogen–
(A) It burns in air to form water (B) It supports combustion
(C) It combines with almost all metals forming hydrides (D)
It readily combines with fluorine and chlorine (Ans : B)
8. Which of the following elements is obtained from sea
weeds ?
(A) Argon (B) Sulphur
(C) Vanadium (D) Iodine (Ans : D)
9. The metallic constituents of hard water are–
(A) Magnesium, Calcium and tin (B) Iron, tin and calcium
(C) Calcium, magnesium and iron (D) Magnesium, tin and
iron (Ans : C)
10. The location and energy of an electron in an atom can
be specified by–
(A) Atomic mass (B) Atomic number
(C) Quantum numbers (D) None of these (Ans : C)
11. Old-written material, which cannot be read easily can be
read by–
(A) Cosmic Rays (B) Ultraviolet rays
(C) Infra Red rays (D) None of these ( Ans : C)
12. In an atomic nucleus, neutrons and protons are held
together by–
(A) Gravitational forces (B) Magnetic forces
(C) Exchange forces (D) Coulombic forces ( Ans : C)
13. The type of glass used in making prisms and lenses is–
(A) Soft glass (B) Pyrex glass
(C) Jena glass (D) Flint glass ( Ans : D)
14. Carbon tetrachloride fire extinguisher should not be
used in closed room because it produces poisonous glass
called–
(A) Carbon Monoxide (B) Phosphine
(C) Phosgene (D) None of these (Ans : D)
15. Which of the following is commonly called a
polyamide ?
(A) Rayon (B) Orion
(C) Terylene (D) Nylon (Ans : D)
16. Hydrometer is an instrument–
(A) For measuring sound in water (B) To detect the presence
of hydrogen in the atmosphere
(C) For measuring the specific gravity of liquids (D) To
detect the changes in atmospheric humidity ( Ans : C)
17. Which thermometer is used to indicate the lowest
temperature ?
(A) Clinical thermometer (B) Gas thermometer
(C) Alcohol thermometer (D) Resistance thermometer (Ans :
C)
18. A chronometer measures–
(A) Sound waves (B) Time
(C) Water waves (D) Colour contrast ( Ans : B)
19. If temperature is kept constant during the reaction the
process is called–
(A) Adiabatic (B) Isobaric
(C) Isochoric (D) Isothermal (Ans : D)
20. Cholera is caused by–
(A) vibrio cholerae (B) salmonella
(C) bacterioceoccurs (D) None of these( Ans : A)
21. Why do colloidal substance do not deposited below ?
(A) Specific gravity is less (B) It is of very less amount in
respect of solvent
(C) They carry electrical charges (D) They are converted to
sovent ( Ans : A)
22. Which of the following gases is obtained by the reaction
of water with calcium carbide–
(A) Acetylene (B) Ethylene
(C) Methane (D) Water gas ( Ans : A)
23. Cooking oil can be converted into vegetable ghee by the
process of–
(A) oxidation (B) hydrogenation
(C) distillation (D) crystalisation (Ans : B)
24. The contact process is involved in the manufacture of–
(A) nitric acid (B) Sulphuric acid
(C) Ammonia (D) Caustic soda ( Ans : B)
25. Antidiuretic hormone (ADH)–
(A) inhibits the secretion of growth hormone by the pituitary
(B) inhibits the rate of heart beat
(C) causes the muscular walls of the arterioles to contract
that simulates the reabsorption of water from the kidney
tubules.
(D) causes an increase in the blood pressure (Ans : C)