100+ Chemistry MCQs (Important for Punjab & Haryana High Court Exam)

Friends, below is the list of important MCQs of Chemistry (collected from previous years competitive exams papers). Specially Designed for Punjab Haryana High Court Exam. This list will be helpful for all upcoming Punjab Govt. Exam. 

Q-1 An alloy used in making heating elements for electric heating devices is
(a) solder
(b) alloy steel
(c) nichrome
(d) German silver

Q-2 Diamond is an allotropic form of
(a) silicon
(b) carbon
(c) sulphur
(d) germanium

Q-3 Air is a/an
(a) compound
(b) element
(c) mixture
(d) electrolyte

Q-4 Which of the following is the best conductor of electricity?
(a) Ordinary water
(b) Sea water
(c) Boiled water
(d) Distilled water

Q-5 Balloons are filled with
(a) helium
(b) oxygen
(c) nitrogen
(d) argon

Q-6 The charcoal use to decolourise raw sugar is
(a) animal charcoal
(b) sugar charcoal
(c) coconut charcoal
(d) wood charcoal

Q-7 The most abundant metal in the earth’s crust is
(a) zinc
(b) copper
(c) aluminium
(d) iron

Q-8 Which of the following is the lightest metal?
(a) Mercury
(b) Silver
(c) Lithium
(d) Lead

Q-9 The most important ore of aluminium is
(a) bauxite
(b) calamine
(c) calcite
(d) galena

Q-10 The element present in the largest amount in rocks and minerals is
(a) carbon
(b) silicon
(c) hydrogen
(d) aluminium

Q-11 Production of chlorofiuorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products ?
(a) Television
(b) Tubelight
(c) Cooking gas
(d) Refrigerator 

Q-12 The gas used to extinguish fire, is
(a) neon
(b) nitrogen
(c) carbon dioxide
(d) carbon monoxide

Q-13 In which of the following activities silicon carbide is used ?
(a) Making cement and glass
(b) Disinfecting water of ponds
(c) Making casts for statues
(d) Cutting very hard substances

Q-14 Which of the following is used in beauty parlours for hair setting?
(a) Chlorine
(b) Sulphur
(c) Phosphorus
(d) Silicon

Q-15 What type of reaction is carried out by the lipase in the digestion of fats?
(a) Reduction
(b) Dehydration
(c) Hydrolysis
(d) Calcification

Q-16 Which one of the following compounds is frequently found packed with drying tubes?
(a) Calcium sulphate
(b) Magnesium chloride
(c) Calcium chloride
(d) Sodium thiosulphate

Q-17 The element common to all acids is
(a) carbon
(b) hydrogen
(c) oxygen
(d) sulphur

Q-18 Gobar gas contains mainly
(a) methane
(b) carbon dioxide
(c) butane
(d) carbon monoxide

Q-19 The most malleable metal is
(a)Silver
(b)Gold
(c) Aluminium
(d)Sodium

Q-20 Tetraethyl lead is used as
(a) mosquito repellent
(b)painkiller
(c) fire extinguisher
(d)petrol additive

Q-21 Metal used to make wires for safety fuses must have
(a) very low resistivity and high melting point
(b) high resistivity and low melting point
(c) low resistivity and low melting point
(d) high resistivity and high melting point

Q-22 Which of the following is not a natural polymer?
(a) Wool
(b) Silk
(c) Cotton
(d) Teflon

Q-23 Which one among the following polymers is used to make personal armour such as combat helmets, ballistic face masks, and ballistic vests?
(a) Teflon
(b) PVC
(c) Bakelite
(d) Kevlar

Q-24 Which of the following gases in the atmosphere is/are responsible for acid rains?
I. Oxides of sulphur
II. Oxides of nitrogen
III. Oxides of carbon Select the correct answer using the codes given below”

(a) I and II
(b) I and III
(c) Only II
(d) All of these

Q-25 Vermicompost is a/an
(a) inorganic fertilizer
(b) toxic substance
(c) organic bio fertilizer
(d) synthetic fertilizer

Q-26 Which one of the following is involved for desalination of sea water?
(a) Simple osmosis
(b) Reverse osmosis
(c) Use of sodium aluminium silicate as zeolite
(d) Use of ion selective electrode

Q-27 The pungent smell of garlic is due to
(a) a phosphate compound
(b) a nitrate compound
(c) a sulphur compound
(d) a chlorine compound

Q-28 Which one among the following statement about an atom is not correct?
(a) Atoms always combine to form molecule
(b) Atoms are the basic units from which molecules and ions are formed
(c) Atoms are always neutral in nature
(d) Atoms aggregate in large numbers to from the matter that we can see, feel and touch

Q-29 The light emitted by firefly is due to
(a) a radioactive substance
(b) chemiluminiscence process
(c) a photoelectric process
(d) burning of phosphorus

Q-30 Which one among the following metals is used in fireworks to make a brilliant white light?
(a) Sodium
(b) Magnesium
(c) Aluminium
(d) Silver

Q-31 Which one of the following reactions is responsible for the transformation of inexpensive liquid vegetable fats into commercially important solid fats (e.g. ghee)?
(a) Hydrogenation
(b) Oxidation
(c) Halogenation
(d) Saponification

Q-32 Which one of the following is the softest?
(a) Sodium
(b) Iron
(c) Aluminium
(d) Copper

Q-34 A polymer which is used for making ropes and carpet fibres is
(a) polyacetylene
(b) polypropylene
(c) polyacrylonitrile
(d) PVC

Q-35 Which one among the following salts causes hardness to the water?.
(a) Calcium bicarbonate
(b) Calcium carbonate
(c) Sodium sulphate
(d) Potassium chloride

Q-36 Why is the meat preserved in the brine solution is not spoil as quickly as fresh meat?
(a) The bacteria will fall victim to osmosis and shrivel up and die-
(b) The brine solution makes the meat acidic, so growth of bacteria is prevented
(c) The brine solution is an unfavourable medium for the reproduction of bacteria
(d) None of the above

Q-37 Which one of the following is used as a mordant in dyeing and tanning industry?
(a) Magnesium oxide
(b) Magnesium chloride
(c) Magnesium sulphate
(d) Magnesium carbonate

Q-38 Which one of the following is the reason for keeping the chloroform in brown-tinted glass containers?
(a) Its brilliance colour hurts eyes
(b) Its deep red colour is piercing
(c) With UV-rays and 02, it forms poisonous gas phosgene
(d) With IR-rays, it forms a poisonous cyanide

Q-39 Which one among the following is the chief compound used in Pepper spray, a riot control agent?
(a) Capsaicin
(b) Black pepper
(c) Sulphur dioxide
(d) Hydrogen sulphide

Q-40 The flavour of apple is mainly due to which one of the following?
(a) Formalin
(b) Ethanol
(c) Benzene
(d) Benzaldehyde

Q-41 Which one of the following chemicals released along with domestic wastes has caused the phenomenon of Eutrophication’ which leads to high productivity of water bodies?
(a) Phosphates and nitrates
(b) Sulphates and chlorides
(c) Chlorides and carbonates
(d) Bicarbonates and carbonates

Q-42 Which one of the following has been producing/can produce light by a chemical change?
(a) Electric bulb
(b) Moon
(c) Sun
(d) Lightning and thunder

Q-43 Which one of the following chemical compounds is responsible for the stimulation of tear glands by the onion?.
(a) A phosphate compound
(b) A nitrate compound
(c) A sulphide compound
(d) A chloride compound

Q-44 KO2 (Potassium superoxide) is used in oxygen cylinders in space and submarines because it
(a) eliminates moisture
(b) absorbs C0₂
(c) produces ozone
(d) produces C0₂

Q-45 The bleaching action of chlorine occurs in the presence of
(a) moisture
(b) sunlight
(c) pure oxygen
(d) pure sulphur dioxide

Q-46 Which one among the following polymers is re-synthesised from the naturally occurring polymer?
(a) Kevlar
(b) Teflon
(c) Rayon
(d) Cellulose

Q-47 Many communities put salt on their roads after a snowfall, Why?
(a) To enhance the freezing and hardening of snow
(b) To control the slipping of vehicles
(c) To keep the melted snow from refreezing
(d) None of the above

Q-48 Why hard water does not give lather with soap?
(a) Hard water contains calcium and magnesium ions, which form precipitate with soap
(b) Hard water contains sulphate and chloride ions, which form precipitate
(c) pH of hard water is high
(d) pH of hard water is less

Q-49 The rusting of iron nail
(a) decreases it weight
(b) increases its weight
(c) does not affect weight but iron is oxidised
(d) does not affect weight but iron is reduced

Q-50 Which one of the following is correct? Butter is?
(a) a supercooled oil
(b) an emulsion
(c) a molecular solid
(d) a gel

Q-51 A pale blue gas with a fish-like odour restores the colour of a blackened lead painting. The gas is also used as rocket fuel. It is
(a) oxygen
(b) ammonia
(c) sulphur dioxide
(d) ozone

Q-52 Which one of the following is used to slow down the speed of the neutrons in the nuclear reactor?
(a) Controlling rod
(b) Moderator
(b) Coolant
(d) Accelerator

Q-53 Which one among the following substances evolved heat when dissolved in water?
(a) Glucose
(b) Fructose
(c) Quick lime
(d) Salt peter

Q-54 The most abundant metal in the Earth’s crust is
(a) Si
(b) Fe
(c) Al
(d) Cu

Q-55 Which of the following is correct for the semiconductor?
(a) A large gap between filled band and vacant band
(b) An impurity band present between filled band and vacant band.
(c) A small gap between filled band and vacant band.
(d) Filled band and vacant band overlap with one another

Q-56 Making of chappathi is based on
(a) Graham’s law
(b) Henry’s law
(c) Charles’ law
(d) Boyle’s law

Q-57 The hair dye available in the market contains two bottles, one containing dye and other containing hydrogen peroxide. The bottles are mixed before applying the dye. The function of hydrogen peroxide is
(a)to dilute the dye
(b)to oxidise the dye to give desired colour
(c)to reduce the dye to give desired colour
(d)to acidify the dye solution

Q-58 Which one of the following pairs of metals is present in the cytochrome-c and chlorophyll respectively?.
(a) Fe and Zn
(b) Mg and Mn
(c) Fe and Mg
(d) Mg and Zn

Q-59 Which one of the following carbohydrates is used for silvering of mirror?
(a) Sucrose
(b) Maltose
(c)Fructose
(d) Glucose

Q-60 Which bioinsecticide was first developed on commercial scale?
(a) Morphine
(b) Quinine
(c) DDT
(d) Sporeine

Q-61 Which one among the following will you put into pure water in order to pass electric current through it?
(a) Kerosene
(b) Mustard oil
(c) Sugar
(d) Lemon juice

Q-62 What is “Agent orange”?
(a) An insecticide
(b) A weedicide
(c) A fertilizer
(d) A biofertilizer

Q-63 What is the role of positive catalyst in a chemical reaction?
(a) It increases the rate of reaction
(b) It decreases the rate of reaction
(c) It increases the yield of the products
(d) It provides better purity of the products

Q-64 The coil in a heater is made of
(a) nichrome
(b) tungsten
(c) copper
(d) iron

Q-65 From which one among the following water source, the water is likely to be contaminated with fluorine?
(a) Ground water
(b) Rain water
(c) River water
(d) Pond water

Q-66 Which one of the following is not responsible for the global warming?
(a) Carbon dioxide
(b) Methane
(c) CFCs
(d)Slacked lime

Q-67 The Fehlling’s solution is used for the detection of
(a) glucose
(b) starch
(c) lipids
(d) proteins

Q-68 Shallow lake with rich organic products are called
(a) heterotrophic
(b) eutrophic
(c) mesotrophic
(d) oligotrophic

Q-69 A person is weak, sterile and has very poor eyesight. These are the symptoms because of a pollutant
(a) copper
(b) mercury
(c) magnesium
(d) lead

Q-70 In terms of magnetic properties oxygen belongs to
(a) magnetic material
(b) ferromagnetic materials
(c) paramagnetic materials-
(d) diamagnetic materials

Q-71 The pure form of carbon is
(a) diamond
(b) graphite
(c) charcoal
(d) fullerene

Q-72 Which one of the following reducing agents can also act as an oxidising agent?
(a)Hydrogen chloricd
(b)Hydrogen iodide
(c)Hydrogen sulphide
(d)Sulphur dioxide

Q-73 The polymeric fibre used as a substitute for wool in making synthetic blankets, sweater, etc., is
(a) nylon
(b) teflon
(c) orlon
(d) bakelite

Q-74 A body is charged negatively. It implies that
(a) it has lost some of its protons
(b) it has lost some of its electrons
(c) it has gained some electrons from outside
(d) None of the above

Q-75 Which one among the following polymers is used for making bullet-proof material?
(a) Polyvinyl chloride
(b) Polystyrene
(c) Polyethylene
(d) Polyamide

Q-76 Which one of the following is the metallurgical operation in which a metal is obtained in a fused state?
(a) Calcination
(b) Roasting
(c) Froth floatation
(d) Smelting

Q-77 What is the role of positive catalyst in chemical reaction?
(a) It increase the rate of reaction
(b) It decrease the rate of reaction
(c) It increases the yield of the products
(d) It provides better purity of the products

Q-78 Which one of the following oxides is the most abundant in Earth crust?
(a) Na2O
(b) CaO
(c) MgO
(d) SiO2

Q-79 Natural Opal which is commonly used as gemstones in many countries is mainly
(a) a hydrated calcium compound
(b) a magnesium compound
(c) a sulphur compound
(d) a hydrated silica

Q-80 Sacrificial anode protects Iron or ships, underground pipelines etc. from rusting, a process known as cathodic protection. Which one of the following metals cannot be used as a sacrificial anode?
(a) Tin
(b) Aluminium
(c) Zinc
(d) Magnesium

Q-81 In modern days, which one of the following chemical compounds is used for the hair setting in beauty parlour/ salon?
(a) A phosphate compound
(b) A sulphur compound
(c) A magnesium compound
(d) A bicarbonate compound

Q-82 The gas used in a refrigerator is
(a)cooled down on flowing
(b)heated up on flowing
(c)cooled down when compressed
(d)cooled down when expanded

Q-83 Which one of the following is not an ore?
(a) Bauxite
(b) Pig iron
(c) Malachite
(d) Zinc blende

Q-84 Which one of the following is used to measure the performance of a motor or gasoline, an aviation fuel?
(a) Iodine number
(b) Octane number
(c) Both ‘a’ and ‘b’
(d) Neither ‘a’ nor ‘b’

Q-85 The number of spectral lines when electron jumps from 5th energy level to 2nd energy level state will be
(a) 5
(b) 10
(c) 6
(d) 15

Q-86 Which one among the following chemicals can be used to clean the surface of gold ornaments?
(a) Concentrated sulphuric acid
(b) Concentrated sodium hydroxide
(c) Aqua-regia
(d) Sodium thiosulphate solution

Q-87 Which one among the following statements is correct?
(a) All bases are alkalis
(b) None of the basis is alkali
(c) There are no more bases except the alkalis
(d) All alkalis are bases but all bases are not alkalis

Q-88 Which chemical was an important symbol in our struggle for freedom?
(a) Glucose
(b)Fertilizer
(c) Medicine
(d)Sodium chloride

Q-89 Which one of the following is the hardest alkali metal?
(a) Li
(b) K
(c) Na
(d) Cs

Q-90 At the very low temperature, ice forms
(a)tetrahedral crystal
(b)cubic crystal
(c)hexagonal crystal
(d)None of the above

Q-91 Food wrapped in newspaper is likely to get contaminated with
(a) aluminium
(b) lead
(c) iron
(d) magnesium

Q-92 Consider the following statements
I.Dry ice is the solid form of CO2.
II.Dry ice is used primarily as a cooling agent.
III.Water ice is colder than dry ice.
Which of the statements given above is/are correct?

(a) Only I
(b) Only II
(c) I and II
(d) I, II and III

Q-93 The bonding between the nitrogenous bases of one strand with another strand of DNA is done by

(a) covalent bond
(b) van der Waals’ interaction
(c) hydrogen bond
(d) ionic bond

Q-94 Which one among the following when dissolved in water give hissing sound?
(a) Limestone
(b) Sodalime
(c) Slaked lime
(d)Quick lime

Q-95 Which one among the following would expand the most on being heated?
(a) Water
(b) Air
(c) Alcohol
(d) Glass

Q-96 If a limestone piece is dipped in water, bubbles evolve. The bubbling is due to
(a) hydrogen
(b) oxygen
(c) water vapour
(d) carbon dioxide

Q-97 Commercially vulcanisation of rubber involves
(a) sulphur
(b) carbon
(c) phosphorus
(d) selenium

Q-98 Scuba divers are at high risk due to high concentration of dissolved gases while breathing air at high pressure under water. The tanks used by Scuba divers are filled with
(a) air diluted with helium
(b) 02
(c) N2
(d) a mixture of nitrogen and helium

Q-99 Carbonated beverages such as soft drinks and soda water contains mainly
(a) carbon dioxide
(b) calcium carbonate
(c) calcium hydroxide
(d) potassium carbonate

Q-100 Which one of the following is correct? Setting of plaster of Paris is “
(a)dehydration
(b)oxidation with atmospheric oxygen
(c)hydration leading to another hydrate
(d)combination with atmospheric carbon dioxide

Q-101 Consider the following substances
I. Heavy Water
II. Graphite
Which of the substances given above is/are used as a moderator in a nuclear reactor? ”
(a) Only I
(b) Only II
(c) Both I and II
(d) Neither I nor II

Q-102 Which one of the following is used in the preparation of antiseptic solution?
(a)Potassium nitrate
(b)Iodine
(c)Iodine chloride
(d)Potassium chloride

Q-103 When the fats are reacted with alkali, they form ’soaps’. The type of reaction taking place in the formation of soaps is called
(a) emulsification
(b) saponification
(c) halogenation
(d) oxidation

Q-104 The biological specimens in laboratory are preserved in the glass containing formalin. What is the “formalin”?
(a)An aqueous solution of H2S04
(b)An aqueous solution of HNOa
(c)An aqueous solution of formaldehyde
(d)Concentrated solution of HNOa

Q-105 Which one of the following is the major component of the photochemical smog?
(a) Carbon dioxide
(b) Ozone
(c) Carbon monoxide
(d) Nitrogen

Q-106 As which one of the following, does carbon occur in its purest form in nature?
(a) Diamond
(b) Graphite
(c) Carbon black
(d) Coal

Q-107 The pH of fresh groundwater slightly decreases upon exposure to air because “
(a) carbon dioxide from air is dissolved in the water
(b) oxygen from air is dissolved in the water
(c) the dissolved carbon dioxide of the groundwater escapes into air
(d) the dissolved oxygen of the groundwater escapes into air

Q-108 Which of the following pesticide is applied to the foundation of buildings to prevent termites?
(a) Aldrin
(b) Malathion
(c) Atrazine
(d) Carbaryl

Q-109 Which one of the following enzyme is used to digest gelatine in the process of recovering silver from the photographic film?
(a) Amylase
(b) Pepsin
(c) lipase
(d) None of these

Q-110 Contact lenses are made from
(a) polyvinyl chloride
(b) polystyrene
(c) Teflon
(d) lucite

Q-111 Now does the ‘hypo’ used in photography?
(a)It acts as a strong reducing agent
(b)It acts as a strong oxidising agent
(c)It removes unreacted AgBr in the form of complex
(d)All of the above

Q-112 Which of the following pairs of chemical compounds has the potential for carbon capturing by chemical process to reduce the global warming?
(a) Potassium oxide and sodium oxide
(b) Magnesium oxide and calcium oxide
(c) Magnesium oxide and potassium oxide
(d) Calcium oxide and potassium oxide

Q-113 The highest temperature can be achieved in which type of furnace?
(a) Blast
(b) Reverberatory
(c) Electric
(d) None of these

Q-114 One of the occupational health hazards commonly faced by the workers of ceramic, pottery or glass industries is
(a) stone formation in gall bladder
(b) melanoma
(c) stone formation in kidney
(d) silicosis

Q-115 Which one of the following glasses form the basis of re writable CD and DVD solid-state memory technology?
(a) Recycled glass
(b) Borosilicate glasses
(c) Chalcogenide glasses
(d) Pyrex glasses

Q-116 What is the purpose of adding baking soda to dough?.
(a) To generate moisture
(b) To give a good flavour
(c) To give a good colour
(d) To generate carbon dioxid

Q-117 Liquid sodium is used for the heat transfer medium in some of nuclear reactor because
(a) sodium has high rate of vapourisation
(b) sodium has low density and high viscosity
(c) sodium has high specific heat than the most liquid metals
(d) All of the above

Q-118 Which one of the following petroleum refinery products has the lowest boiling point?
(a) Kerosene
(b) Gasoline
(c) Diesel
(d) Lubricating oil

Q-119 Vinegar is used as a condiment, and in the pickling of vegetables and other foods. What is the constituent of vinegar?
(a) Butanoic acid
(b) Methanoic acid
(c) Ethanoic acid
(d) Hexanoic acid

Q-120 Which one of the following is used to measure the combustion quality of diesel fuel during compression ignition?
(a) Octane number
(b) Cetane number
(c) Iodine number
(d) Polenske number

Q-121 Which one of the following is an element?
(a) Topaz
(b) Diamond
(c) Ruby
(d) Sapphire

Q-122 The bond which is present between water molecules is
(a) electrovalent bond
(b) covalent bond
(c) hydrogen bond
(d)van der Waals’ bond

Q-123 Which one among the following agents is added to domestic LPG cylinder to help in the detection of gas leakage?
(a) Methano
(b) Ethanol
(c) Thioethanol
(d) Chloroform

Q-124 Which allotropy of carbon is in rigid three-demensional structure?
(a) Graphite
(b)Fullerene
(c) Diamond
(d)Carbon black

Q-125 Guncotton is used as a propellant or low-order explosive. Chemically the gun cotton is
(a) potassium hydroxide
(b) cellulose sulphate
(c) cellulose nitrate
(d) calcium phosphate

Q-126 Sodium stearate is a salt and is used
(a) in gun powder
(b) in paint
(c) to make soap
(d) to make fertilizer

Q-127 ‘Freon’ used as refrigerants is chemically known as
(a) fluorinated aromatic compound
(b) fluorinated hydrocarbon
(c) chlorinated hydrocarbon
(d) chlorofluoro hydrocarbon

Q-128 Milk, Mayonnaise are the examples of
(a) sol
(b) gel
(c) emulsion
(d) foam

Q-129 Which one among the following is not a greenhouse gas?.
(a) Methane
(b) Hydrogen
(c) Carbon Dioxide
(d) Nitrous Oxide

Q-130 Which one of the following is the important ore of magnesium?
(a) Cassiterite
(b) Malachite
(c) Camalite
(d) Galena

Q-131 Nail polish remover contains
(a) benzene
(b) formaldehyde
(c) acetic acid
(d) acetone

Q-132 Misch metal is widely used in the manufacture of which of the following?
(a) Material of car break
(b) Smoke detectors
(c) Cigarette lighter
(d) Emergency lighter

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