Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3 

a. 4 

b. 5 

c. 2 

d. zero 


Answer- 4


Que- The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in 

a. 1.8 gram of H2O 

b. 12 moles of KMnO4 

c. 0.6N H2SO4 

d. 4.6 gram of C2H5OH 


Answer- 12 moles of KMnO4


Que- Brass is made of 

a. Copper and tin 

b. Tin and lead 

c. Copper and zinc 

d. Copper, tin and zinc 


Answer- Copper and zinc


Que- Bridgmanite is 

a. A bridge on the river Thames 

b. Name of a game 

c. Earth’s most abundant mineral 

d. Name of a music 


Answer- Earth’s most abundant mineral


Que- Bronze is an alloy of 

a. Copper and Zinc 

b. Tin and Zinc 

c. Copper and Tin 

d. Iron and Zinc 


Answer- Copper and Tin


Que- Percentage of carbon in steel ranges from 

a. 0.1 to 1.5 

b. 1.5 to 3.0 

c. 3.0 to 4.0 

d. 4.0 to 6.0 


Answer- 0.1 to 1.5


Que- Copper is refined by 

a. Roasting 

b. Oxidation 

c. Electrolysis 

d. Zone refining 


Answer- Roasting


Que- Where does the oxygen that keeps us alive come from? 

a. Carbon dioxide 

b. Carbonates absorbed from soil 

c. Oxides of minerals 

d. Water 


Answer- Water


Que- In chemical terms, what are alums used for purifying water for drinking purposes ? 

a. Hydrated chlorides 

b. Double nitrate 

c. Double sulphates 

d. Nitrates of aluminium 


Answer- Double sulphates


Que- Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water. 

a. Magnesium 

b. Calcium 

c. Manganese 

d. None of these 


Answer- None of these


Que- If water smells bad, then that odour can be removed by adding 

a. Alum 

b. Bleach 

c. Activated carbon 

d. Deactivated nitrogen 


Answer- Activated carbon


Que- Surface water is a better source of drinking water because it is poor in 

a. Dust 

b. Bacteria 

c. Arsenic 

d. Algae 


Answer- Arsenic


Que- Heavy metal pollution of water is caused by: 

a. Paints 

b. Wood burning 

c. Acid Plants 

d. Domestic sewage 


Answer- Paints


Que- Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful 

a. Solar ultraviolet radiation 

b. Solar infrared radiation 

c. CO2 in the air 

d. SO2 in the air 


Answer- Solar ultraviolet radiation


Que- 'Bhopal gas tragedy' 1984 is related to which gas 

a. Aluminium Phosphide 

b. Methyl bromide 

c. Methyl isocyanate 

d. Carbon dioxide 


Answer- Methyl isocyanate


Que- When a nutrient like fertilizer is present in large quantities in a water bodies, plants grow and decay in large numbers because of suffocation of pond that does not leave enough oxygen needed to support life. This type of pollution is called 

a. Smog 

b. Eutrophication 

c. Green house effect 

d. None of these 


Answer- Eutrophication


Que- Which of the following is the correct sequence of countries in terms of maximum carbon dioxide emission? 

a. China, USA, European Union, India 

b. USA, India, China, European Union 

c. China, India, European Union, USA 

d. European Union, China, USA, India 


Answer- China, USA, European Union, India


Que- Normal rainwater is slightly acidic due to the presence of 

a. Carbon dioxide 

b. Sulphur dioxide 

c. Methane 

d. None of the above 


Answer- Carbon dioxide


Que- Global warming is mainly due to accumulation of 

a. Oxides of nitrogen 

b. Oxides of sulphur 

c. Carbon dioxide 

d. Carbon monoxide 


Answer- Carbon dioxide


Que- Main pollutants released from iron and steel industry are 

a. CO, CO2 and SO2 

b. NO, SO3 and H2S 

c. CO2, H2S and NO2 

d. CO2, NO2 and SO3 


Answer- CO, CO2 and SO2


Que- Which one of the following is a major green house gas? 

a. Carbon dioxide 

b. Chloro fluorocarbon 

c. Carbon monoxide 

d. Freon 


Answer- Carbon dioxide


Que- The 'solid waste' is also known as 

a. Sedge 

b. Toxic waste 

c. Sludge 

d. Scrubber 


Answer- Sludge


Que- Periodic table contains how many periods 

a. 6 

b. 7 

c. 8 

d. 10 


Answer- 7


Que- Which one is the lightest element in the periodic table 

a. Hydrogen 

b. Helium 

c. Oxygen 

d. Carbon 


Answer- Hydrogen


Que- Which one of the following is most electronegative? 

a. Carbon 

b. Silicon 

c. Lead 

d. Tin 


Answer- Carbon


Que- Periodic table contains how many groups 

a. 16 

b. 17 

c. 18 

d. 19 


Answer- 18


Que- Total number of elements in the Periodic table 

a. 112 

b. 115 

c. 118 

d. 127 


Answer- 118


Que- Synthetic detergents are prepared from 

a. Potassium salts of higher fatty-acids 

b. Sodium salts of higher fattyacids 

c. Hydrocarbons of petroleum 

d. Glycerides 


Answer- Hydrocarbons of petroleum


Que- What is a mixture of potassium nitrate, powdered charcoal and sulphur called? 

a. Glass 

b. Cement 

c. Paint 

d. Gun powder 


Answer- Gun powder


Que- Iodex, a pain relief balm, has the smell of ________ . 

a. Methyl salicylate 

b. Ethyl salicylate 

c. Propyl salicylate 

d. Butyl salicylate 


Answer- Methyl salicylate


Que- Silver halides are used in photographic plates because they are 

a. Oxidised in air 

b. Soluble in hyposolution 

c. Reduced by light 

d. Totally colourless 


Answer- Reduced by light


Que- Who developed Hydrogen Bomb? 

a. Wernher Von Braun 

b. J. Robert Oppen Heimer 

c. Edward Teller 

d. Samuel Cohen 


Answer- Edward Teller


Que- Bleaching powder is used in drinking water as a/an 

a. Disinfectant 

b. Antibiotic 

c. Antiseptic 

d. Coagulant 


Answer- Disinfectant


Que- The process of removing calcium and magnesium from hard water is known as 

a. Sedimentation 

b. Filtration 

c. Flocculation 

d. Water softening 


Answer- Water softening


Que- Hard water and soft water can be distinguished by using 

a. Dilute acid 

b. Ordinary soap 

c. Detergent 

d. Liquid soap 


Answer- Detergent


Que- Which method will be employed to test the hardness of water? 

a. Boiling 

b. Distillation 

c. Formation of lather with soap 

d. None of these 


Answer- Formation of lather with soap


Que- The purest form of water is 

a. Tap water 

b. Rain water 

c. Ground water 

d. Distilled water 


Answer- Rain water


Que- The hardest form of carbon is 

a. coke 

b. graphite 

c. diamond 

d. charcoal 


Answer- diamond


Que- The most important ore of aluminium is 

a. bauxite 

b. magnetite 

c. haematite 

d. monazite 


Answer- bauxite


Que- The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of 

a. an addition reaction 

b. a condensation reaction 

c. an oxidation reaction 

d. an elimination reaction 


Answer- a condensation reaction


Que- The number of electrons presents in H+ is 

a. zero 

b. one 

c. two 

d. three 


Answer- zero


Que- The hottest part of the gas flame is known as 

a. luminous zone 

b. dark zone 

c. blue zone 

d. non-luminous zone 


Answer- luminous zone


Que- Saccharin is made up of 

a. Toluene 

b. Phenol 

c. Propane 

d. Butane 


Answer- Toluene


Que- The compound to which H2 does not add is 

a. Biphenyl ethylene 

b. Tetraphenyl ethylene 

c. Tetra – a –naphthylethylene 

d. Tetra –9 – phenanthrylethylene 


Answer- Tetraphenyl ethylene


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

a. Ca(CN)2 

b. CaCN2 

c. NH4NO3 

d. Urea 


Answer- Ca(CN)2


Que- The pair of compounds used as anaesthetic in medicines : 

a. Ether, Ammonia 

b. Nitrous oxide, Chloroform 

c. Chloroform, Nitrogen dioxide 

d. Nitrogen dioxide, ether 


Answer- Nitrous oxide, Chloroform


Que- Which of the following is used for refrigeration? 

a. Sulphur dioxide 

b. Chlorine 

c. Freon 

d. Phosphine 


Answer- Freon


Que- L.P.G. is mostly liquefied 

a. Hydrogen 

b. Oxygen 

c. Butane 

d. Methane 


Answer- Butane


Que- Which one of the following is not coal variety? 

a. Lignite 

b. Bituminous 

c. Dolomite 

d. Peat 


Answer- Dolomite


Que- Which of the following is used to increase the anti-knocking property of petrol ? 

a. Tetramethyl lead 

b. Tetraethyl lead 

c. Trimethyl lead 

d. Triethyl lead 


Answer- Tetraethyl lead


Que- The quality of petrol is expressed in terms of 

a. Cetane number 

b. Gold number 

c. Octane number 

d. Added unlead compounds 


Answer- Octane number


Que- Which of the following type of coal has the lowest proportion of volatile matter ? 

a. Lignite 

b. Peat 

c. Bituminous 

d. Anthracite 


Answer- Anthracite


Que- A colloidal system in which a liquid is dispersed in a liquid is called 

a. Gel 

b. Emulsion 

c. Sol 

d. Precipitate 


Answer- Emulsion


Que- Which is a natural colloid ? 

a. Sodium chloride 

b. Urea 

c. Cane-sugar 

d. Blood 


Answer- Blood


Que- Suspension particles have the size between 

a. 10–2 – 10–4 cm 

b. 10–5 – 10–7cm 

c. 10–8 – 10–10cm 

d. 10–1 – 10–2 cm 


Answer- 10–2 – 10–4 cm


Que- Which of the following acts as best adsorbent? 

a. Charcoal 

b. Activated Charcoal 

c. Activated Coconut Charcoal 

d. Carbon black 


Answer- Activated Coconut Charcoal


Que- Gelatin is mostly used in making ice-creams in order to 

a. Prevent making a colloid 

b. Stabilise the colloid and prevent crystallisation 

c. Stabilise mixture 

d. Enrich the aroma 


Answer- Stabilise the colloid and prevent crystallisation


Que- Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ? 

a. Borax 

b. Saltpetre 

c. Hydrogen peroxide 

d. Sodium chloride 


Answer- Sodium chloride


Que- Soap is prepared by boiling caustic soda with 

a. Alcohol 

b. Kerosene oil 

c. Glycerine 

d. Fats 


Answer- Fats


Que- 'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of – 

a. Hund's rule of maximum multiplicity 

b. Exclusion Principle of Pauli 

c. Uncertainty Principle of Hiesenberg 

d. Avogadro's Law 


Answer- Exclusion Principle of Pauli


Que- Which of the following is not a donor atom? 

a. Phosphorus 

b. Antimony 

c. Arsenic 

d. Aluminium 


Answer- Aluminium


Que- What happens when a chemical bond is formed ? 

a. Energy is always absorbed 

b. Energy in always released 

c. More energy is released than is absorbed 

d. Energy is neither released nor absorbed 


Answer- Energy is always absorbed


Que- Among the following the hardest metal is 

a. Gold 

b. Iron 

c. Platinum 

d. Tungsten 


Answer- Tungsten


Que- What material is used to make electric heater coil ? 

a. Copper 

b. Iron 

c. Silver 

d. Nichrome 


Answer- Nichrome


Que- Among the following, which is always found in free-state in nature? 

a. Gold 

b. Silver 

c. Sodium 

d. Copper 


Answer- Gold


Que- Philosopher’s Wool is 

a. Zinc carbonate 

b. Zinc sulphate 

c. Zinc oxide 

d. Zinc blende 


Answer- Zinc oxide


Que- Which of the following metals has least melting point ? 

a. Gold 

b. Silver 

c. Mercury 

d. Copper 


Answer- Mercury


Que- Commercial nitric acid is coloured because it contains dissolved : 

a. Oxygen 

b. Nitrous oxide 

c. Nitrogen dioxide 

d. Coloured impurities 


Answer- Nitrogen dioxide


Que- Choose the incorrect statement pertaining to organic compounds 

a. They have low melting and boiling points 

b. They do not dissolve in water 

c. They are not easily combustible 

d. They contain mainly carbon and hydrogen 


Answer- They are not easily combustible


Que- The gas which emits from rice field is 

a. Ethane 

b. Methane 

c. Nitrogen 

d. All of the above 


Answer- Methane


Que- Ethylene is a ________ molecule. 

a. Polar 

b. Ionic 

c. Covalent 

d. Nonpolar 


Answer- Nonpolar


Que- The next higher homologue of C6H14 is 

a. C7H14 

b. C7H12 

c. C6H12 

d. C7H16 


Answer- C7H16


Que- In an oxygen molecule, two atoms are united by 

a. One bond 

b. Two bonds 

c. Three bonds 

d. Four bonds 


Answer- Two bonds


Que- How many electrons are there in a Hydrogen atom? 

a. One 

b. Two 

c. Three 

d. Four 


Answer- One


Que- The third shell of an atom can have a maximum of ______ electrons. 

a. 13 

b. 15 

c. 18 

d. 21 


Answer- 18


Que- Who developed the model of atomic structure ? 

a. Bohr and Rutherford 

b. Volta 

c. Alfred Nobel 

d. Faraday 


Answer- Bohr and Rutherford


Que- Which among the following is a covalent compound ? 

a. Calcium chloride 

b. Magnesium fluoride 

c. Sodium chloride 

d. Carbon tetrachloride 


Answer- Carbon tetrachloride


Que- Gold dissolves in 

a. Hydrochloric acid 

b. Nitric acid 

c. Aqua regia 

d. Acetic acid 


Answer- Aqua regia


Que- Nitric acid does not react with 

a. Gold 

b. Copper 

c. Zinc 

d. Iron 


Answer- Gold


Que- Nitrogen in water is commonly found in the form of 

a. Nitrous oxide 

b. Nitrate 

c. Nitric oxide 

d. Nitrite 


Answer- Nitrite


Que- Aquaregia is a mixture of the following in the ratio 1 : 3 by volume 

a. Conc. HNO3 and conc. HCl 

b. Conc. HNO3  and conc. H2SO4 

c. Dil. HCl and dil. HNO3  

d. Conc. HCl and conc. HNO3  


Answer- Conc. HNO3 and conc. HCl


Que- One of the following is used to dissolve noble metals. That is 

a. Nitric acid 

b. Hydrochloric acid 

c. Sulphuric acid 

d. Aqua regia 


Answer- Aqua regia


Que- Aspirin is 

a. Methoxy benzoic acid 

b. Methyl Salicilate 

c. Acetyl Salicilic acid 

d. Phenyl Salicilate 


Answer- Acetyl Salicilic acid


Que- Aspirin is common name of 

a. Salicylic Acid 

b. Salicylate 

c. Methyl Salicylate 

d. Acetyl Salicylic Acid 


Answer- Acetyl Salicylic Acid


Que- By-product obtained by soap industry is 

a. Caustic soda 

b. Glycerol 

c. Naphthalene 

d. Caustic potash 


Answer- Glycerol


Que- Chloroform can be used as 

a. Analgesic 

b. Anaesthetic 

c. Antimalarial 

d. Antibiotic 


Answer- Anaesthetic


Que- Soap helps in better cleaning of clothes because 

a. Soap acts like catalyst 

b. It reduces the surface tension of solution 

c. It gives strength to solution 

d. It absorbs the dirt 


Answer- It reduces the surface tension of solution


Que- Rusting of iron takes place due to 

a. Oxidation 

b. Carbonation 

c. Exfoliation 

d. Corrosion 


Answer- Oxidation


Que- Combustion of a candle is a/an 

a. Photochemical reaction 

b. Physical change 

c. Endothermic reaction 

d. Exothermic reaction 


Answer- Exothermic reaction


Que- Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ? 

a. Methane 

b. Ethane 

c. Propane 

d. Butane 


Answer- Butane


Que- Candle is a mixture of 

a. Paraffin was and stearic acid 

b. Bees wax and stearic acid 

c. Higher fatty acids and stearic acid 

d. Bees wax and paraffin wax 


Answer- Paraffin was and stearic acid


Que- Coal is formed from 

a. Crude oil 

b. Deposit of animal waste 

c. Coke 

d. Compressed and hardened biomass 


Answer- Compressed and hardened biomass


Que- Which one of the following forms of phosphorus is most reactive? 

a. Black phosphorus 

b. White phosphorus 

c. Violet phosphorus 

d. Red phosphorus 


Answer- White phosphorus


Que- Limestone is a raw material used by which industry? 

a. Aluminium 

b. Fertilizers 

c. Cement 

d. Petrochemicals 


Answer- Cement


Que- The element absorbed both in cation and anion form is 

a. Sulphur 

b. Nitrogen 

c. Calcium 

d. Phosphorus 


Answer- Nitrogen


Que- Cement containing excess amount of lime 

a. Cracks during setting 

b. Becomes more strong 

c. Is slow setting 

d. Is quick setting 


Answer- Becomes more strong


Que- Commercially, sodium bicarbonate is known as 

a. Washing soda 

b. Baking soda 

c. Bleaching powder 

d. Soda ash 


Answer- Baking soda


Que- All isotopes of the same element have ________ 

a. Different atomic numbers and different atomic mass 

b. Different atomic numbers and the same atomic mass 

c. The same atomic number but different atomic masses 

d. The same atomic number and the atomic mass 


Answer- The same atomic number but different atomic masses


Que- The fundamental particles present in the nucleus of an atom are 

a. Electron, proton 

b. Proton, neutron 

c. Neutron, electron 

d. Neutron, positron 


Answer- Proton, neutron


Que- J.J. Thomson’s proposed model of atom is generally called ________ model. 

a. Cream and cake 

b. Plum and pudding 

c. Plum and cake 

d. Cream and pudding 


Answer- Plum and pudding

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