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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