Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- Brass is an alloy of 

a. Lead and tin 

b. Zinc and copper 

c. Antimony, tin and lead 

d. Zinc, tin and copper 

Answer- Zinc and copper

Que- Brass is an alloy of : 

a. Cu, Al and Zn 

b. Cu and Sn 

c. Cu and Zn 

d. Al and Mg 

Answer- Cu and Zn

Que- The gas used for artificial ripening of green fruit is 

a. ethylene 

b. ethane 

c. carbon dioxide 

d. acetylene 

Answer- ethylene

Que- Zone refining is used for the purification of 

a. Au 

b. Ge 

c. Ag 

d. Cu 

Answer- Ge

Que- The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is 

a. cineole 

b. engenol 

c. geraniol 

d. limonene 

Answer- cineole

Que- The molecule which has the highest percentage of ionic character among the following is 

a. HI 

b. HF 

c. HCI 

d. HBr 

Answer- HF

Que- The high reactivity of fluorine is due to 

a. its high electro negativity 

b. small size of fluorine atom 

c. availability of d-orbitals 

d. strong F - F bond 

Answer- its high electro negativity

Que- Diamonds are glittering and attractive because light incident on them undergoes 

a. Highest refraction 

b. Multiple internal reflections 

c. Multiple surface reflections 

d. Hundred percent transmission 

Answer- Multiple internal reflections

Que- If lime water is kept in the air, it turns milky due to presence of : 

a. Carbon dioxide 

b. Nitrogen 

c. Oxygen 

d. Sulphurdioxide 

Answer- Carbon dioxide

Que- Diamond is harder than graphite because of : 

a. Difference in layers of atoms 

b. Tetrahedral structure of diamond 

c. Difference of crystalline structures 

d. None of these 

Answer- Difference in layers of atoms

Que- The gas used to extinguish fire is 

a. Neon 

b. Nitrogen 

c. Carbon dioxide 

d. Carbon monoxide 

Answer- Carbon dioxide

Que- Which among the following coal contains 90 per cent of carbon? 

a. Anthracite 

b. Bitumen 

c. Lignite 

d. Peat 

Answer- Anthracite

Que- Which of the following is not a nitrogenous fetiliser? 

a. Ammonium sulphate 

b. Urea 

c. Ammonium nitrate 

d. Superphosphate 

Answer- Superphosphate

Que- Which one of the following is used as a sowing agent in the preparation of soft drinks? 

a. Phosphoric acid 

b. Phosphorus acid 

c. Salicylic acid 

d. Boric acid 

Answer- Phosphoric acid

Que- Pyrethrin used in mosquito coil is obtained from 

a. A seed plant 

b. An insect 

c. A bacterium 

d. A fungus 

Answer- A seed plant

Que- What is a common name for the substance which irritates lachrymal glands ? 

a. Tear Gas 

b. Laughing Gas 

c. Anaesthetic Gas 

d. Noble Gas 

Answer- Tear Gas

Que- The material used in solar cells contains 

a. Tin 

b. Silicon 

c. Caesium 

d. Thallium 

Answer- Silicon

Que- The nuclear particle having no mass and no charge, but only spin is 

a. Proton 

b. Neutrino 

c. Meson 

d. Electron 

Answer- Neutrino

Que- The orientation of an atomic orbital is governed by 

a. Principal quantum number 

b. Magnetic quantum number 

c. Spin quantum number 

d. Azimuthal quantum number 

Answer- Magnetic quantum number

Que- 'Atomic theory' of matter was given by 

a. Avogadro 

b. Dalton 

c. Newton 

d. Pascal 

Answer- Dalton

Que- The most suitable unit for expressing nuclear radius is : 

a. Nanometre 

b. Fermi 

c. Angstrom 

d. Micron 

Answer- Angstrom

Que- The total energy of revolving electron in an atom 

a. Cannot be negative 

b. Can have any value above zero 

c. Can never be positive 

d. Will always be positive 

Answer- Can never be positive

Que- Hamburger effect is otherwise known as– 

a. Sodium pump 

b. Anaerobic metabolism 

c. Chloride shift 

d. Respiratory product 

Answer- Chloride shift

Que- The inert gas used as beacon light is 

a. Kr 

b. Ar 

c. He 

d. Ne 

Answer- Ne

Que- The noble gas used in radiotherapy is 

a. Neon 

b. Argon 

c. Radon 

d. Xenon 

Answer- Radon

Que- Inert gases are 

a. Miscible with water 

b. Not stable 

c. Chemically unreactive 

d. Chemically very active 

Answer- Chemically unreactive

Que- Which one of the following does not form oxyacid ? 

a. Sulphur 

b. Chlorine 

c. Nitrogen 

d. Fluorine 

Answer- Fluorine

Que- What is the chemical symbol of mercury? 

a. Mr 

b. Mg 

c. Hg 

d. None of the above 

Answer- Hg

Que- Which of the following is a monoatomic gas? 

a. Oxygen 

b. Neon 

c. Nitrogen 

d. Fluorine 

Answer- Neon

Que- The purest form of water in nature is 

a. Rain water 

b. Lake water 

c. River water 

d. Sea water 

Answer- Rain water

Que- In drinking water supply, which of the following treatments is not involved 

a. Coagulation 

b. Sedimentation 

c. Softening 

d. Disinfection 

Answer- Softening

Que- The two metal ions that cause hardness to water are: 

a. Calcium, Magnesium 

b. Sodium, Calcium 

c. Sodium, Potassium 

d. Sodium, Magnesium 

Answer- Calcium, Magnesium

Que- The iron ore magnetite consists of 

a. Fe2O3 

b. Fe3OH4 

c. FeCO3 

d. 3Fe2O3 .3H2O 

Answer- Fe2O3

Que- The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is 

a. 5x/36 

b. 5x 

c. 7.2 x 

d. x/6 

Answer- 5x/36

Que- The major constituent of air is 

a. carbon dioxide 

b. nitrogen 

c. oxygen 

d. hydrogen 

Answer- nitrogen

Que- The main chemical constituent of clay is 

a. silicon oxide 

b. aluminium borosilicate 

c. zeolites 

d. aluminium silicate 

Answer- aluminium silicate

Que- The mineral containing both magnesium and calcium is 

a. magnesite 

b. calcite 

c. carnallite 

d. dolomite 

Answer- dolomite

Que- Two moles of an ideal gas expand freely into vacuum. The work done by the gas is 

a. 2J 

b. 4J 

c. Infinity 

d. 0 

Answer- 0

Que- The Fungus which is used in the alcohol industry is 

a. Mushroom 

b. Candida Aibicans 

c. Yeast 

d. Rhizopus 

Answer- Yeast

Que- Which of the following is used to denature ethanol ? 

a. Methyl alcohol 

b. Propyl alcohol 

c. Phenol 

d. Methane 

Answer- Methyl alcohol

Que- Ethanol containing 5% water is known as 

a. Rectified spirit 

b. Denatured spirit 

c. Methylated alcohol 

d. Power alcohol 

Answer- Rectified spirit

Que- Alcohol prepared by the distillation of wood is : 

a. Propyl alcohol 

b. Methyl alcohol 

c. Ethyl alcohol 

d. Glycerol 

Answer- Methyl alcohol

Que- London smog is found in 

a. Summer during day time 

b. Summer during morning time 

c. Winter during morning time 

d. Winter during day time 

Answer- Winter during morning time

Que- Photo chemical smog is a resultant of the reaction among 

a. High concentration of NO2, O3, and CO in the evening 

b. CO, CO2 and NO2 at low temperature 

c. CO, O2 and peroxy acetyl nitrate in the presence of Sunlight 

d. NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight 

Answer- NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight

Que- The gas involved in Bhopal incident was 

a. Hydrogen sulphide 

b. Nitrogen dioxide 

c. Methyl chloride 

d. Methyl isocyanate 

Answer- Methyl isocyanate

Que- Which of the following chemicals is responsible for depletion of ozone layer in the atmosphere? 

a. Chlorofluorocarbons 

b. Nitrous oxide 

c. Sulphur dioxide 

d. Carbon dioxide 

Answer- Chlorofluorocarbons

Que- Which of the following is a method/process of disposing of solid waste which cannot be reused or recycled ? 

a. Landfills 

b. Incineration 

c. Pyrolysis and Gasification 

d. All the above 

Answer- All the above

Que- Sour taste of ‘Coca Cola’ is due to the presence of 

a. Acetic acid 

b. Phosphoric acid 

c. Hydrochloric acid 

d. Formic acid 

Answer- Phosphoric acid

Que- An acid having basicity one is 

a. Sodium dihydrogen phosphate 

b. Disodium hydrogen phosphate 

c. Sodium phosphate 

d. Phosphoric acid 

Answer- Disodium hydrogen phosphate

Que- The acid present in red ants is 

a. Acetic acid 

b. Butyric acid 

c. Caproic acid 

d. Formic acid 

Answer- Formic acid

Que- Bee sting contains 

a. An acidic liquid 

b. A salt solution 

c. An alkaline liquid 

d. A corrosive liquid 

Answer- An acidic liquid

Que- Sweat contains water and ________ 

a. Citric acid 

b. Lactic acid 

c. Salt 

d. Vinegar 

Answer- Salt

Que- The main use of salt in the diet is to 

a. make the taste of food better 

b. produce in small amounts the hydrochloric acid required for the digestion of food 

c. ease the process of cooking 

d. increase the solubility of food particles in water 

Answer- produce in small amounts the hydrochloric acid required for the digestion of food

Que- The monomer of polythene is 

a. vinyl chloride 

b. ethylene 

c. ethyl alcohol 

d. None of the above 

Answer- ethylene

Que- The luster of a metal is due to 

a. its high density 

b. its high polishing 

c. its chemical inertness 

d. presence of free electrons 

Answer- presence of free electrons

Que- The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is 

a. 1.568 x 103 

b. 6.023 x 1019 

c. 4.84 x 1017 

d. 6.023 x 1023 

Answer- 6.023 x 1019

Que- The most malleable metal is 

a. platinum 

b. silver 

c. iron 

d. gold 

Answer- gold

Que- The most pure form of Carbon among the options is 

a. Anthracite 

b. Lampblack 

c. Graphite 

d. Wood Charcoal 

Answer- Anthracite

Que- Carbon footprint can be reduced by 

a. All of these 

b. Recycling waste materials 

c. Using energy efficient appliances 

d. Commuting by public transport 

Answer- All of these

Que- Which of the following gases is most toxic ? 

a. Carbon dioxide 

b. Carbon monoxide 

c. Sulphur dioxide 

d. Chlorine 

Answer- Carbon monoxide

Que- Why is water not suitable for putting out a petrol fire ? 

a. The oxygen content of water is isolated by petrol and thus it helps in burning 

b. Petrol is too inflammable to be extinguished by water 

c. The heat required for combustion of petrol is very low 

d. Water, being heavy, slips below petrol which thus remains in contact with air and burns 

Answer- Water, being heavy, slips below petrol which thus remains in contact with air and burns

Que- Which of the following is used as a lubricant in heavy machines? 

a. Bauxite 

b. Sulphur 

c. Phosphorus 

d. Graphite 

Answer- Graphite

Que- Which of the following is used in making smoke bombs? 

a. Sulphur 

b. Phosphorus 

c. Hydrogen 

d. Carbon 

Answer- Carbon

Que- Water gas is the mixture of 

a. Carbon dioxide and hydrogen 

b. Carbon monoxide and nitrogen 

c. Carbon monoxide and hydrogen 

d. Carbon dioxide and nitrogen 

Answer- Carbon monoxide and hydrogen

Que- In electro-refining, the pure metal is deposited on 

a. Vessel 

b. Electrolyte 

c. Cathode 

d. Anode 

Answer- Cathode

Que- Which of the following electrodes is used in strongly alkaline solution? 

a. Mercury - mercuric oxide electrode 

b. Mercury - mercurous sulphate electrode 

c. Mercury - mercurous chloride electrode 

d. Silver - silver chloride electrode 

Answer- Mercury - mercuric oxide electrode

Que- The laws of electrolysis are given by 

a. Ostwald 

b. Faraday 

c. Arrhenius 

d. Lewis 

Answer- Faraday

Que- Global warming may result in 

a. Flood 

b. Cyclone 

c. Decrease in forest productivity 

d. All of the above 

Answer- All of the above

Que- Oxygen which is vital for life is a product of photosynthesis and comes from 

a. Carbonates from soil 

b. Carbon dioxide 

c. Water 

d. Oxides of mineral elements 

Answer- Water

Que- Which one of the following is a greenhouse gas ? 

a. Nitrogen 

b. Helium 

c. Carbon dioxide 

d. Sulphur dioxide 

Answer- Carbon dioxide

Que- Acid rain is caused by the pollution of environment by 

a. Carbon monoxide and Carbon dioxide 

b. Ozone and Carbon dioxide 

c. Nitrous oxide and Sulphur dioxide 

d. Carbon dioxide and Nitrogen 

Answer- Nitrous oxide and Sulphur dioxide

Que- The ‘Green House effect’ is produced due to the presence of excess amount of 

a. Sulphur dioxide 

b. Nitrogen dioxide 

c. Carbon monoxide 

d. Methane 

Answer- Methane

Que- Which one is the most reactive gaseous element? 

a. Chlorine 

b. Bromine 

c. Iodine 

d. Flourine 

Answer- Flourine

Que- Which of the following metals occurs in free state ? 

a. Copper 

b. Iron 

c. Zinc 

d. Lead 

Answer- Lead

Que- The “King of Metals” is : 

a. Gold 

b. Silver 

c. Iron 

d. Aluminium 

Answer- Gold

Que- Which of the following metals is used in Space Crafts to withstand high temperatures ? 

a. Fe 

b. Ti 

c. Ni 

d. Pb 

Answer- Ti

Que- Phosphorus is kept in water because 

a. Its ignition temperature is very high 

b. Its ignition temperature is very low 

c. Its critical temperature is high 

d. Its critical temperature is low 

Answer- Its ignition temperature is very low

Que- Most commonly used bleaching agent is 

a. Sodium chloride 

b. Alcohol 

c. Carbon dioxide 

d. Chlorine 

Answer- Chlorine

Que- The acid which is secreted by the glands in the stomach wall is 

a. Sulphuric acid 

b. Hydrochloric acid 

c. Nitric acid 

d. Phosphoric acid 

Answer- Nitric acid

Que- Hydrochloric acid is also known as 

a. Galic acid 

b. Picric acid 

c. Muriatic acid 

d. Chloric acid 

Answer- Muriatic acid

Que- Heating of a ore below its melting point in the absence of air is known as 

a. Refining 

b. Calcination 

c. Roasting 

d. Smelting 

Answer- Calcination

Que- Stainless steel is usually made by alloying the steel with 

a. Copper and nickel 

b. Copper and chromium 

c. Chromium and nickel 

d. Manganese and copper 

Answer- Chromium and nickel

Que- Which one of the following mineral does not contain oxygen ? 

a. Haematite 

b. Bauxite 

c. Cryolite 

d. Calcite 

Answer- Cryolite

Que- Which mineral is the ore of aluminium ? 

a. Haematite 

b. Bauxite 

c. Magnetite 

d. Siderite 

Answer- Bauxite

Que- Which of the following is a metallic ore ? 

a. Mica 

b. Quartz 

c. Feldspar 

d. Galena 

Answer- Galena

Que- Magnalium is an alloy of 

a. Aluminium and Magnesium 

b. Magnesium and Tin 

c. Aluminium and Zinc 

d. Manganese and Magnesium 

Answer- Aluminium and Magnesium

Que- Magnetite is 

a. Fe2O3 

b. Fe3O4 

c. FeCO3 

d. 2Fe2O3. 3H2O 

Answer- Fe3O4

Que- Atomic number of an atom gives the number of which of the following ? 

a. Electrons 

b. Protons 

c. Neutrons 

d. Neutrons and protons 

Answer- Protons

Que- The chemical bahaviour of an atom depends upon 

a. The number of protons in its nucleus 

b. The number of neutrons in the nucleus 

c. The number of electrons orbiting around the nucleus 

d. The number of nucleons in the nucleus 

Answer- The number of electrons orbiting around the nucleus

Que- Which one of the following has a maximum tendency to form M3 ion ? 

a. N 

b. Bi 

c. P 

d. As 

Answer- N

Que- A matured mammalian cell without nucleus is 

a. Lymphocyte 

b. Erythrocyte 

c. Spermatozoan 

d. Oocyte 

Answer- Erythrocyte

Que- Which of the following metals can displace copper from copper sulphate solution ? 

a. Platinum 

b. Mercury 

c. Iron 

d. Gold 

Answer- Iron

Que- Which type of radiations are absorbed by the upper layer of the atmosphere? 

a. Radio-waves 

b. Infrared 

c. Visible 

d. Ultraviolet 

Answer- Ultraviolet

Que- Sulphur dioxide level in the atmosphere can be reduced by using 

a. More efficient car engines 

b. Catalytic converters in industry 

c. Static electricity to attract it in factory chimneys 

d. Low - sulphur fuels 

Answer- Low - sulphur fuels

Que- The term 'brown air' is used for 

a. Acid fumes 

b. Photochemical smog 

c. Sulphurous smog 

d. Industrial smog 

Answer- Photochemical smog

Que- The sewage obtained from water closets and urinals is known as 

a. Sanitary waste 

b. Industrial waste 

c. Garbage 

d. Sullage 

Answer- Sanitary waste

Que- Which one amongst the following is not a Green House gas? 

a. Nitrogen 

b. Carbon dioxide 

c. Carbon Monoxide 

d. Chloro fluoro carbons 

Answer- Nitrogen

Que- Main pollutant present in automobile exhaust is 

a. CO 

b. CO2 

c. NO 

d. Hydrocarbons 

Answer- CO

Que- The liquid waste from kitchens and baths, of residences is known as : 

a. Domestic sewage 

b. Storm water 

c. Sullage 

d. Refuse 

Answer- Sullage

Que- Most poisonous pollutant in water is 

a. Zinc 

b. Phosphate 

c. Arsenic 

d. Detergent 

Answer- Arsenic

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