General Knowledge chemistry multiple choice questions and answers .
Questions
1 The system that uses radioactivity to decide the period of materials of pre-historic period is :
A Radium dating
B Uranium dating
C Carbon dating
D Deuterium dating
Answer: Option [C]
2 Which of the following is a carbohydrate ?
A Nylon
B Cane-sugar
C Turpentine
D Hydrogen peroxide
Answer: Option [B]
3 Maximum iron ore is found in which of the following states ?
A FeCO3
B Fe2O3
C Fe3O4
D FeS2
Answer: Option [B]
4 Commercial nitric acid is coloured because it contains dissolved :
A Oxygen
B Nitrous oxide
C Nitrogen dioxide
D Colored impurities
Answer: Option [C]
5 Which gas is used for artificial fruit ripening of green fruit ?
A Ethylene
B Acetylene
C Ethane
D Methane
Answer: Option [A]
6 What is the chemical name for ‘baking soda’?
A Sodium carbonate
B Sodium bicarbonate
C Sodium nitrite
D Sodium nitrate
Answer: Option [B]
7 Which of the following gases is present under pressure in soft drinks ?
A Oxygen
B Nitrogen
C Carbon dioxide
D Nitrous oxide
Answer: Option [C]
8 Which radioactive element used in heat pacemakers ?
A Uranium
B Deuterium
C Plutonium
D Radium
Answer: Option [C]
9 The anode in a dry cell consists of :
A Copper
B Zinc
C Cadmium
D Graphite
Answer: Option [B]
10 Milk is a colloidal system in which :
A Water is dispersed in fat
B Fat is dispersed in water
C Fat and water are dispersed in each other
D Fat is dissolved
Answer: Option [B]
11 Which enzyme converts glucose to ethyl alcohol ?
A Invertase
B Maltase
C Zymase
D Diastase
Answer: Option [C]
12 Who developed atom bomb ?
A Warner Wan Brown
B J. Robert Openheimer
C Edward Taylor
D Samuel Koehen
Answer: Option [B]
13 The acid used in lead storage cells is :
A phosphoric acid
B hydrochioric acid
C nitric acid
D sulphuiric acid
Answer: Option [D]
14 Soap is prepared by boiling caustic soda with which of the following ?
A Alcohol
B Kerosene oil
C Glycerine
D Fats
Answer: Option [D]
15 Bronze is an alloy of :
A copper and Zinc
B Tin and Zinc
C Copper and Zinc and Tin
D Iron and Zinc
Answer: Option [C]
16 The natural sources of hydrocarbon is :
A Crude oil
B Biomass
C Carbohydrates
D None of these
Answer: Option [A]
17 Which among the following metals provide amphoteric oxide ?
A Sodium
B Silver
C Aluminium
D Calcium
Answer: Option [C]
18 Which among the following is pure matter ?
A Carbon-dioxide
B Brass
C Air
D Iron
Answer: Option [A]
19 Quartz is made of which of the following ?
A Calcium Sulphate
B Calcium Silicate
C Sodium Sulphate
D Sodium Silicate
Answer: Option [D]
20 Galvanised iron is made by coating iron with :
A Zinc
B Nickel
C Chromium
D Lead
Answer: Option [A]
21 The element that is in the highest percentage in the composition of the earth :
A Silicon
B Oxygen
C Magnesium
D Iron
Answer: Option [B]
22 Which are the fundamental particles present in the nucleus of an atom ?
A Electron, proton
B Proton, neutron
C Neutron, electron
D Neutron, positron
Answer: Option [B]
23 Which of the following alkali metals has highest specific heat ?
A Caesium
B Rubidium
C Potassium
D Lithium
Answer: Option [D]
24 What are the metallic constituents of hard water ?
A Magnesium, calcium and tin
B Iron, tin and calcium
C Calcium, magnesium and iron
D Magnesium, tin and iron
Answer: Option [C]
25 Which of the following imparts deep blue colour to glass ?
A Cobalt oxide
B Cupric oxide
C Phosphorus
D Nickel oxide
Answer: Option [A]
26 Which of the following elements is non-radioactive ?
A Uranium
B Thorium
C Plutonium
D Zirconium
Answer: Option [D]
27 What is the purest form of iron ?
A Steel
B Cast iron
C Pig iron
D Wrought iron
Answer: Option [D]
28 Which of the following metals form an amalgam with other metals ?
A Lead
B Tin
C Zinc
D Mercury
Answer: Option [D]
29 Which of the following is the main nitrogenous waste in humans ?
A Ammonia
B Urea
C Uric Acid
D Ammonium Nitrate
Answer: Option [B]
30 Drinking soda is :
A Alkaline
B Acidic
C Neutral
D Oxidant
Answer: Option [B]
31 When there are two electrons in the same orbital, they have:
A same spin
B opposite spin
C Same or opposite spin
D no spin
Answer: Option [B]
32 Wax is chemically a mixture of
A aliphatic hydrocarbon
B cyclic hydrocarbon
C aromatic hydrocarbon
D aliphatic and aromatic hydrocarbon
Answer: Option [A]
33 Ultra violet radiation striking the earth is due to the depletion of
A oxygen
B ozone
C carbon dioxide
D carbon monoxide
Answer: Option [B]
34 Galvanisation is the
A deposition of aluminium on iron
B deposition of copper on iron
C deposition of tin on iron
D deposition of zinc on iron
Answer: Option [D]
35 What is the most commonly used substance in fluorescent tubes
A Sodium vapour and Neon
B Sodium oxide and Argon
C Mercury vapour and Argon
D Mercury oxide and Neon
Answer: Option [C]
36 Which of the following gas is chiefly present in LPG (liquefied petroleum gas)
A Butane
B Propane
C Ethane
D Methane
Answer: Option [A]
37 Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid
A Methyl red
B Methyl orange
C Methylene blue
D Phenolphthaline
Answer: Option [B]
38 Bauxite is an alloy of which of the following metals?
A Iron
B Tin
C Silver
D Aluminium
Answer: Option [D]
39 Cement is made hard with
A dehydration
B polymerization
C dissociation of water
D hydration and dissociation of water
Answer: Option [D]
40 Table salt get moist during rainy season because
A Sodium chloride is deliquescent
B Sodium chloride is hydroscopic
C Sodium chloride contains some quantity of Sodium iodide
D Sodium chloride contains hydroscopic impurities like magnesium chloride
Answer: Option [D]
41 Silk fiber chemically is:
A Fat
B Protein
C Cellulose
D Carbohydrate
Answer: Option [B]
42 Formation of ozone hole is maximum over
A India
B Africa
C Europe
D Antarctica
Answer: Option [D]
43 Global warming is mainly due to accumulation of
A Carbon monoxide
B Carbon dioxide
C Oxide of sulphur
D Oxides of nitrogen
Answer: Option [B]
44 Baryllium Sulphate is less soluble in water due to
A Ionic bond
B low inflammable energy
C high inflammable energy
D low energy of dissociation
Answer: Option [C]
45 Diamond is harder than graphite because of
A Difference of layers of atom
B Tetrahedral structure of diamond
C Difference of crystalline structures
D None of these
Answer: Option [A]
46 What is the chemical name for ‘baking soda’
A Sodium nitrate
B Sodium nitrite
C Sodium carbonate
D Sodium bicarbonate
Answer: Option [D]
47 PVC is obtained by the polymerization of
A Styrene
B Propane
C Acetylene
D Vinyl chloride
Answer: Option [D]
48 The polymerization of which of the following is used in manufacturing of polythene in industry?
A Ethylene
B Acetylene
C Styrene
D Methane
Answer: Option [A]
49 Bleaching action of moist sulphur dioxide is because of its
A Reducing power
B Oxidizing power
C Acidic property
D Basic property
Answer: Option [B]
50 In which of the following substance all carbon atoms are quaternary in nature
A Teflon
B Graphite
C Diamond
D Napthaline
Answer: Option [C]
51 Radioactive disintegration of uranium ultimately results in formation of
A Lead
B Radium
C Thorium
D Polonium
Answer: Option [A]
52 Metal are good conductor because
A The molecules colloid very freely
B They contain reflecting surface
C They contain free electron
D The molecules are very close to each other
Answer: Option [C]
53 Cloud is a colloidal dispersion of
A Fog in a dispersion medium of water
B Mist in a dispersion medium of air
C Air in a dispersion medium of water
D Water drops in a dispersion medium of air
Answer: Option [D]
54 Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes
A Sodium chloride
B Borax
C Saltpeter
D Hydrogen peroxide
Answer: Option [A]
55 Impure camphor is purified by
A Steam distillation
B Sublimation
C Fractional distillation
D Fractional crystallization
Answer: Option [B]
56 Sour taste of ‘Coca Cola’ is due to the presence of
A Formic acid
B Acetic acid
C Hydrochloric acid
D Phosphoric acid
Answer: Option [D]
57 Which of the following is used to restore the colour of old oil-paintings?
A Ozone
B Hydrogen peroxide
C Sodium peroxide
D Barium peroxide
Answer: Option [B]
58 The cathode of a lead storage battery is made up of
A Lead
B Zinc
C Lead oxide
D Manganese dioxide
Answer: Option [C]
59 Heat resistant variety of glass is
A Flint glass
B Hard glass
C Pyrex glass
D None of these
Answer: Option [A]
60 The substance most commonly used as a food preservation is
A Acetic acid
B Tartaric acid
C Sodium carbonate
D Sodium salt of benzoic acid
Answer: Option [D]
61 Which one of the following organic compounds has fruity smell
A Ether
B Ester
C Aldehyde
D Alcohol
Answer: Option [B]
62 A substance which readily forms colloidal solution in contact with water is called
A Hydrophobic colloid
B Hydrophilic colloid
C Associated colloid
D Extrinsic colloid
Answer: Option [B]
63 Which of the following gases is most toxic
A Chlorine
B Sulphur dioxide
C Carbon monoxide
D Carbon dioxide
Answer: Option [C]
64 Water can be separated from alcohol water mixture by
A Sublimation
B Distillation
C Evaporation
D Decantation
Answer: Option [B]
65 Vulcanization of rubber is carried out by adding
A Phosphorus
B Ozone
C Carbon
D Sulphur
Answer: Option [D]
66 Which gas is used as fire extinguisher
A Carbon monoxide
B Sulphur dioxide
C Carbon dioxide
D Carbon suboxide
Answer: Option [C]
67 The lustre of the metal is because of
A High polish
B High density, due to closed pack of atoms
C Absorption of light due to the presence of cavities
D Reflection of light due to the presence of free electrons
Answer: Option [D]
68 The major harmful gas emitted by automobile vehicles which causes air pollution is
A Methane
B Ozone gas
C Carbon monoxide
D Carbon dioxide
Answer: Option [C]
69 Pasteurization is a process in which milk is heated to
A 600C for 10 minutes
B 630C for 20 minutes
C 630C for 30 minutes
D 720C for 10 minutes
Answer: Option [C]
70 Ammonial is a mixture of
A Aluminium powder and ammonium nitrate
B Alluminium powder and potassium sulphate
C Aluminium powder and ammonium chloride
D Alluminium powder and ammonium nitrate
Answer: Option [A]
71 The isotope of Uranium used in atomic reactors is
A U235
B U236
C U237
D U232
Answer: Option [A]
72 Ethanol containing 5% of water is called
A Power alcohol
B Methylated alcohol
C Denatured spirit
D Rectified spirit
Answer: Option [D]
73 Nuclear energy is a mineral based energy source. It is derived from
A Plutonium
B Thorium
C Uranium
D All of the above
Answer: Option [C]
74 Zinc sulphide is commonly used as
A Deodorant
B Rodenticide
C Herbicide
D Fungicide
Answer: Option [B]
75 Helium gas is used in gas balloons instead of hydrogen gas because of
A More stable
B Lighter than hydrogen
C Non combustible
D More abundant than hydrogen
Answer: Option [C]
76 Gunpowder consists of a mixture of
A Sand and TNT
B TNT and charcoal
C Sulphur, sand and charcoal
D Nitre, sulphur and charcoal
Answer: Option [D]
77 Carbon monoxide is an inflammable gas. which of the following is also inflammable
A Hydrogen
B Oxygen
C Helium
D Nitrogen
Answer: Option [A]
78 One of the constituents of tear gas is
A ether
B ethane
C ethanol
D chloropicrin
Answer: Option [D]
79 Silver halide is used in photographic plates because they are
A oxidized in air
B reduced in light
C totally colourless
D soluble in hyposolution
Answer: Option [B]
80 Which one of the following is extensively used for sterilizing water
A Alum
B Soda powder
C Borax powder
D Bleaching powder
Answer: Option [D]
81 Which of the following is not a greenhouse gas?
A hydrogen
B nitric oxide
C carbon dioxide
D chlorofluorocarbon
Answer: Option [A]
82 The process of removing calcium and magnesium from hard water is known as
A Filtration
B Flocculation
C Sedimentation
D Water softening
Answer: Option [D]
83 Humberger effect is otherwise known as –
A Sodium pump
B Choloride shift
C Respiratory product
D Anaerobic metabolism
Answer: Option [B]
84 Which of the following chemical materials is responsible for the depletion of ozone layer
A Nitrous oxide
B Sulphur dioxide
C Carbon dioxide
D Chlorofluorocarbon
Answer: Option [D]
85 The gas used for artificial fruit ripening is
A Ethylene
B Ethane
C Methane
D Acetylene
Answer: Option [A]
86 The metallic constituents of hard water are
A Magnesium, tin and iron
B Calcium, magnesium and iron
C Iron, tin and calcium
D Magnesium, calcium and tin
Answer: Option [B]
87 Which of the following is used as filler in type of rubber
A Coal
B Coke
C Graphite
D Carbon black
Answer: Option [D]
88 The advantage of detergents over soaps is
A Detergents are soluble in water
B Detergents could not give much lather
C Detergents give lather even with hard water
D Soaps give lather with only soft water
Answer: Option [C]
89 Which variety of coal contains recognizable traces of the original plant material
A Peat
B Lignite
C Bitumen
D Anthracite
Answer: Option [A]
90 Which of the following pairs of materials serves as electrodes in chargeable batteries commonly in devices such as torch, electric shavers etc.?
A Zinc and carbon
B Lead peroxide and lead
C Nickel and cadmium
D Iron and cadmium
Answer: Option [C]
91 Hydrogen gas is not found in atmosphere due to
A It is highly inflammable
B It is the lightest gas
C It is absorbed by plants
D It immediately combines with oxygen to form water
Answer: Option [B]
92 By-product obtained by soap industry is
A Glycerol
B Naphthalene
C Caustic soda
D Caustic potash
Answer: Option [A]
93 The acid used in a lead storage battery is
A Nitric acid
B Phosphoric acid
C Sulphuric acid
D Hydrochloric acid
Answer: Option [C]
94 Petroleum is a mixture of
A Salts
B Polymer
C Elements
D Hydrocarbon
Answer: Option [D]
95 Smoke is formed due to
A Solid dispersed in gas
B Gas dispersed in gas
C Gas dispersed in solid
D Solid dispersed in liquid
Answer: Option [A]
96 The chemical name of ‘common salt’ is
A calcium chloride
B ammonium chloride
C sodium nitrate
D sodium chloride
Answer: Option [D]
97 Fertiliser having high Nitrogen content is:
A Urea
B Calcium citrate
C Ammonium nitrate
D Ammonium sulphate
Answer: Option [C]
98 An atomic pile is used for
A producing X-ray
B conducting nuclear fission
C accelerating atoms
D conducting thermonuclear fusion
Answer: Option [B]
99 Sea water can be purified by the process of
A Evaporation
B Filtration
C Distillation
D Fractional distillation
Answer: Option [C]
100 The amount of chlorine available in water after disinfection is called as
A Free chlorine
B Residual chlorine
C Free available chlorine
D Combined available chlorine
Answer: Option [B]
Questions
1 The system that uses radioactivity to decide the period of materials of pre-historic period is :
A Radium dating
B Uranium dating
C Carbon dating
D Deuterium dating
Answer: Option [C]
2 Which of the following is a carbohydrate ?
A Nylon
B Cane-sugar
C Turpentine
D Hydrogen peroxide
Answer: Option [B]
3 Maximum iron ore is found in which of the following states ?
A FeCO3
B Fe2O3
C Fe3O4
D FeS2
Answer: Option [B]
4 Commercial nitric acid is coloured because it contains dissolved :
A Oxygen
B Nitrous oxide
C Nitrogen dioxide
D Colored impurities
Answer: Option [C]
5 Which gas is used for artificial fruit ripening of green fruit ?
A Ethylene
B Acetylene
C Ethane
D Methane
Answer: Option [A]
6 What is the chemical name for ‘baking soda’?
A Sodium carbonate
B Sodium bicarbonate
C Sodium nitrite
D Sodium nitrate
Answer: Option [B]
7 Which of the following gases is present under pressure in soft drinks ?
A Oxygen
B Nitrogen
C Carbon dioxide
D Nitrous oxide
Answer: Option [C]
8 Which radioactive element used in heat pacemakers ?
A Uranium
B Deuterium
C Plutonium
D Radium
Answer: Option [C]
9 The anode in a dry cell consists of :
A Copper
B Zinc
C Cadmium
D Graphite
Answer: Option [B]
10 Milk is a colloidal system in which :
A Water is dispersed in fat
B Fat is dispersed in water
C Fat and water are dispersed in each other
D Fat is dissolved
Answer: Option [B]
11 Which enzyme converts glucose to ethyl alcohol ?
A Invertase
B Maltase
C Zymase
D Diastase
Answer: Option [C]
12 Who developed atom bomb ?
A Warner Wan Brown
B J. Robert Openheimer
C Edward Taylor
D Samuel Koehen
Answer: Option [B]
13 The acid used in lead storage cells is :
A phosphoric acid
B hydrochioric acid
C nitric acid
D sulphuiric acid
Answer: Option [D]
14 Soap is prepared by boiling caustic soda with which of the following ?
A Alcohol
B Kerosene oil
C Glycerine
D Fats
Answer: Option [D]
15 Bronze is an alloy of :
A copper and Zinc
B Tin and Zinc
C Copper and Zinc and Tin
D Iron and Zinc
Answer: Option [C]
16 The natural sources of hydrocarbon is :
A Crude oil
B Biomass
C Carbohydrates
D None of these
Answer: Option [A]
17 Which among the following metals provide amphoteric oxide ?
A Sodium
B Silver
C Aluminium
D Calcium
Answer: Option [C]
18 Which among the following is pure matter ?
A Carbon-dioxide
B Brass
C Air
D Iron
Answer: Option [A]
19 Quartz is made of which of the following ?
A Calcium Sulphate
B Calcium Silicate
C Sodium Sulphate
D Sodium Silicate
Answer: Option [D]
20 Galvanised iron is made by coating iron with :
A Zinc
B Nickel
C Chromium
D Lead
Answer: Option [A]
21 The element that is in the highest percentage in the composition of the earth :
A Silicon
B Oxygen
C Magnesium
D Iron
Answer: Option [B]
22 Which are the fundamental particles present in the nucleus of an atom ?
A Electron, proton
B Proton, neutron
C Neutron, electron
D Neutron, positron
Answer: Option [B]
23 Which of the following alkali metals has highest specific heat ?
A Caesium
B Rubidium
C Potassium
D Lithium
Answer: Option [D]
24 What are the metallic constituents of hard water ?
A Magnesium, calcium and tin
B Iron, tin and calcium
C Calcium, magnesium and iron
D Magnesium, tin and iron
Answer: Option [C]
25 Which of the following imparts deep blue colour to glass ?
A Cobalt oxide
B Cupric oxide
C Phosphorus
D Nickel oxide
Answer: Option [A]
26 Which of the following elements is non-radioactive ?
A Uranium
B Thorium
C Plutonium
D Zirconium
Answer: Option [D]
27 What is the purest form of iron ?
A Steel
B Cast iron
C Pig iron
D Wrought iron
Answer: Option [D]
28 Which of the following metals form an amalgam with other metals ?
A Lead
B Tin
C Zinc
D Mercury
Answer: Option [D]
29 Which of the following is the main nitrogenous waste in humans ?
A Ammonia
B Urea
C Uric Acid
D Ammonium Nitrate
Answer: Option [B]
30 Drinking soda is :
A Alkaline
B Acidic
C Neutral
D Oxidant
Answer: Option [B]
31 When there are two electrons in the same orbital, they have:
A same spin
B opposite spin
C Same or opposite spin
D no spin
Answer: Option [B]
32 Wax is chemically a mixture of
A aliphatic hydrocarbon
B cyclic hydrocarbon
C aromatic hydrocarbon
D aliphatic and aromatic hydrocarbon
Answer: Option [A]
33 Ultra violet radiation striking the earth is due to the depletion of
A oxygen
B ozone
C carbon dioxide
D carbon monoxide
Answer: Option [B]
34 Galvanisation is the
A deposition of aluminium on iron
B deposition of copper on iron
C deposition of tin on iron
D deposition of zinc on iron
Answer: Option [D]
35 What is the most commonly used substance in fluorescent tubes
A Sodium vapour and Neon
B Sodium oxide and Argon
C Mercury vapour and Argon
D Mercury oxide and Neon
Answer: Option [C]
36 Which of the following gas is chiefly present in LPG (liquefied petroleum gas)
A Butane
B Propane
C Ethane
D Methane
Answer: Option [A]
37 Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid
A Methyl red
B Methyl orange
C Methylene blue
D Phenolphthaline
Answer: Option [B]
38 Bauxite is an alloy of which of the following metals?
A Iron
B Tin
C Silver
D Aluminium
Answer: Option [D]
39 Cement is made hard with
A dehydration
B polymerization
C dissociation of water
D hydration and dissociation of water
Answer: Option [D]
40 Table salt get moist during rainy season because
A Sodium chloride is deliquescent
B Sodium chloride is hydroscopic
C Sodium chloride contains some quantity of Sodium iodide
D Sodium chloride contains hydroscopic impurities like magnesium chloride
Answer: Option [D]
41 Silk fiber chemically is:
A Fat
B Protein
C Cellulose
D Carbohydrate
Answer: Option [B]
42 Formation of ozone hole is maximum over
A India
B Africa
C Europe
D Antarctica
Answer: Option [D]
43 Global warming is mainly due to accumulation of
A Carbon monoxide
B Carbon dioxide
C Oxide of sulphur
D Oxides of nitrogen
Answer: Option [B]
44 Baryllium Sulphate is less soluble in water due to
A Ionic bond
B low inflammable energy
C high inflammable energy
D low energy of dissociation
Answer: Option [C]
45 Diamond is harder than graphite because of
A Difference of layers of atom
B Tetrahedral structure of diamond
C Difference of crystalline structures
D None of these
Answer: Option [A]
46 What is the chemical name for ‘baking soda’
A Sodium nitrate
B Sodium nitrite
C Sodium carbonate
D Sodium bicarbonate
Answer: Option [D]
47 PVC is obtained by the polymerization of
A Styrene
B Propane
C Acetylene
D Vinyl chloride
Answer: Option [D]
48 The polymerization of which of the following is used in manufacturing of polythene in industry?
A Ethylene
B Acetylene
C Styrene
D Methane
Answer: Option [A]
49 Bleaching action of moist sulphur dioxide is because of its
A Reducing power
B Oxidizing power
C Acidic property
D Basic property
Answer: Option [B]
50 In which of the following substance all carbon atoms are quaternary in nature
A Teflon
B Graphite
C Diamond
D Napthaline
Answer: Option [C]
51 Radioactive disintegration of uranium ultimately results in formation of
A Lead
B Radium
C Thorium
D Polonium
Answer: Option [A]
52 Metal are good conductor because
A The molecules colloid very freely
B They contain reflecting surface
C They contain free electron
D The molecules are very close to each other
Answer: Option [C]
53 Cloud is a colloidal dispersion of
A Fog in a dispersion medium of water
B Mist in a dispersion medium of air
C Air in a dispersion medium of water
D Water drops in a dispersion medium of air
Answer: Option [D]
54 Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes
A Sodium chloride
B Borax
C Saltpeter
D Hydrogen peroxide
Answer: Option [A]
55 Impure camphor is purified by
A Steam distillation
B Sublimation
C Fractional distillation
D Fractional crystallization
Answer: Option [B]
56 Sour taste of ‘Coca Cola’ is due to the presence of
A Formic acid
B Acetic acid
C Hydrochloric acid
D Phosphoric acid
Answer: Option [D]
57 Which of the following is used to restore the colour of old oil-paintings?
A Ozone
B Hydrogen peroxide
C Sodium peroxide
D Barium peroxide
Answer: Option [B]
58 The cathode of a lead storage battery is made up of
A Lead
B Zinc
C Lead oxide
D Manganese dioxide
Answer: Option [C]
59 Heat resistant variety of glass is
A Flint glass
B Hard glass
C Pyrex glass
D None of these
Answer: Option [A]
60 The substance most commonly used as a food preservation is
A Acetic acid
B Tartaric acid
C Sodium carbonate
D Sodium salt of benzoic acid
Answer: Option [D]
61 Which one of the following organic compounds has fruity smell
A Ether
B Ester
C Aldehyde
D Alcohol
Answer: Option [B]
62 A substance which readily forms colloidal solution in contact with water is called
A Hydrophobic colloid
B Hydrophilic colloid
C Associated colloid
D Extrinsic colloid
Answer: Option [B]
63 Which of the following gases is most toxic
A Chlorine
B Sulphur dioxide
C Carbon monoxide
D Carbon dioxide
Answer: Option [C]
64 Water can be separated from alcohol water mixture by
A Sublimation
B Distillation
C Evaporation
D Decantation
Answer: Option [B]
65 Vulcanization of rubber is carried out by adding
A Phosphorus
B Ozone
C Carbon
D Sulphur
Answer: Option [D]
66 Which gas is used as fire extinguisher
A Carbon monoxide
B Sulphur dioxide
C Carbon dioxide
D Carbon suboxide
Answer: Option [C]
67 The lustre of the metal is because of
A High polish
B High density, due to closed pack of atoms
C Absorption of light due to the presence of cavities
D Reflection of light due to the presence of free electrons
Answer: Option [D]
68 The major harmful gas emitted by automobile vehicles which causes air pollution is
A Methane
B Ozone gas
C Carbon monoxide
D Carbon dioxide
Answer: Option [C]
69 Pasteurization is a process in which milk is heated to
A 600C for 10 minutes
B 630C for 20 minutes
C 630C for 30 minutes
D 720C for 10 minutes
Answer: Option [C]
70 Ammonial is a mixture of
A Aluminium powder and ammonium nitrate
B Alluminium powder and potassium sulphate
C Aluminium powder and ammonium chloride
D Alluminium powder and ammonium nitrate
Answer: Option [A]
71 The isotope of Uranium used in atomic reactors is
A U235
B U236
C U237
D U232
Answer: Option [A]
72 Ethanol containing 5% of water is called
A Power alcohol
B Methylated alcohol
C Denatured spirit
D Rectified spirit
Answer: Option [D]
73 Nuclear energy is a mineral based energy source. It is derived from
A Plutonium
B Thorium
C Uranium
D All of the above
Answer: Option [C]
74 Zinc sulphide is commonly used as
A Deodorant
B Rodenticide
C Herbicide
D Fungicide
Answer: Option [B]
75 Helium gas is used in gas balloons instead of hydrogen gas because of
A More stable
B Lighter than hydrogen
C Non combustible
D More abundant than hydrogen
Answer: Option [C]
76 Gunpowder consists of a mixture of
A Sand and TNT
B TNT and charcoal
C Sulphur, sand and charcoal
D Nitre, sulphur and charcoal
Answer: Option [D]
77 Carbon monoxide is an inflammable gas. which of the following is also inflammable
A Hydrogen
B Oxygen
C Helium
D Nitrogen
Answer: Option [A]
78 One of the constituents of tear gas is
A ether
B ethane
C ethanol
D chloropicrin
Answer: Option [D]
79 Silver halide is used in photographic plates because they are
A oxidized in air
B reduced in light
C totally colourless
D soluble in hyposolution
Answer: Option [B]
80 Which one of the following is extensively used for sterilizing water
A Alum
B Soda powder
C Borax powder
D Bleaching powder
Answer: Option [D]
81 Which of the following is not a greenhouse gas?
A hydrogen
B nitric oxide
C carbon dioxide
D chlorofluorocarbon
Answer: Option [A]
82 The process of removing calcium and magnesium from hard water is known as
A Filtration
B Flocculation
C Sedimentation
D Water softening
Answer: Option [D]
83 Humberger effect is otherwise known as –
A Sodium pump
B Choloride shift
C Respiratory product
D Anaerobic metabolism
Answer: Option [B]
84 Which of the following chemical materials is responsible for the depletion of ozone layer
A Nitrous oxide
B Sulphur dioxide
C Carbon dioxide
D Chlorofluorocarbon
Answer: Option [D]
85 The gas used for artificial fruit ripening is
A Ethylene
B Ethane
C Methane
D Acetylene
Answer: Option [A]
86 The metallic constituents of hard water are
A Magnesium, tin and iron
B Calcium, magnesium and iron
C Iron, tin and calcium
D Magnesium, calcium and tin
Answer: Option [B]
87 Which of the following is used as filler in type of rubber
A Coal
B Coke
C Graphite
D Carbon black
Answer: Option [D]
88 The advantage of detergents over soaps is
A Detergents are soluble in water
B Detergents could not give much lather
C Detergents give lather even with hard water
D Soaps give lather with only soft water
Answer: Option [C]
89 Which variety of coal contains recognizable traces of the original plant material
A Peat
B Lignite
C Bitumen
D Anthracite
Answer: Option [A]
90 Which of the following pairs of materials serves as electrodes in chargeable batteries commonly in devices such as torch, electric shavers etc.?
A Zinc and carbon
B Lead peroxide and lead
C Nickel and cadmium
D Iron and cadmium
Answer: Option [C]
91 Hydrogen gas is not found in atmosphere due to
A It is highly inflammable
B It is the lightest gas
C It is absorbed by plants
D It immediately combines with oxygen to form water
Answer: Option [B]
92 By-product obtained by soap industry is
A Glycerol
B Naphthalene
C Caustic soda
D Caustic potash
Answer: Option [A]
93 The acid used in a lead storage battery is
A Nitric acid
B Phosphoric acid
C Sulphuric acid
D Hydrochloric acid
Answer: Option [C]
94 Petroleum is a mixture of
A Salts
B Polymer
C Elements
D Hydrocarbon
Answer: Option [D]
95 Smoke is formed due to
A Solid dispersed in gas
B Gas dispersed in gas
C Gas dispersed in solid
D Solid dispersed in liquid
Answer: Option [A]
96 The chemical name of ‘common salt’ is
A calcium chloride
B ammonium chloride
C sodium nitrate
D sodium chloride
Answer: Option [D]
97 Fertiliser having high Nitrogen content is:
A Urea
B Calcium citrate
C Ammonium nitrate
D Ammonium sulphate
Answer: Option [C]
98 An atomic pile is used for
A producing X-ray
B conducting nuclear fission
C accelerating atoms
D conducting thermonuclear fusion
Answer: Option [B]
99 Sea water can be purified by the process of
A Evaporation
B Filtration
C Distillation
D Fractional distillation
Answer: Option [C]
100 The amount of chlorine available in water after disinfection is called as
A Free chlorine
B Residual chlorine
C Free available chlorine
D Combined available chlorine
Answer: Option [B]
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