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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