Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- In galvanization, iron is coated with 

a. Copper 

b. Zinc 

c. Tin 

d. Nickel 

Answer- Zinc

Que- The process of improving the quality of rubber by heating it with sulphur is called 

a. Vulcanization 

b. Acceleration 

c. Sulphonation 

d. Galvanization 

Answer- Vulcanization

Que- Which one among the following is not a mixture? 

a. Graphite 

b. Glass 

c. Brass 

d. Steel 

Answer- Graphite

Que- The gas used to dilute oxygen for breathing by deep sea divers is: 

a. Neon 

b. Argon 

c. Nitrogen 

d. Helium 

Answer- Helium

Que- The most abundant element in the human body is 

a. Carbon 

b. Iron 

c. Nitrogen 

d. Oxygen 

Answer- Oxygen

Que- The most abundant element in the earth’s atmosphere is 

a. Argon 

b. Nitrogen 

c. Oxygen 

d. Krypton 

Answer- Nitrogen

Que- Select the one which is not a mixture : 

a. Air 

b. Gasoline 

c. LPG 

d. Distilled water 

Answer- Distilled water

Que- Which of these acids is not organic in origin? 

a. Lactic acid 

b. Sulphuric acid 

c. Citric acid 

d. Oxalic acid 

Answer- Sulphuric acid

Que- Match the sourc in Column B with the product of Column A. (Product) Column B (Source)A. Formic acid1. LemonB. Citric acid 2. TamarindC. Tartaric acid3. Ants 

a. A B C3 2 1 

b. A B C3 1 2 

c. A B C2 3 1 

d. A B C2 1 3 

Answer- A B C3 1 2

Que- Saline soil contains 

a. High concentration of salt 

b. Lot of moisture 

c. Hard rocks 

d. None of the above 

Answer- High concentration of salt

Que- Sour milk contains 

a. Acetic acid 

b. Tartaric acid 

c. Citric acid 

d. Lactic acid 

Answer- Lactic acid

Que- Basicity of boric acid, H3BO3 is 

a. 2 

b. 3 

c. 4 

d. 5 

Answer- 2

Que- The substance which does not expand on going from liquid state to solid state is 

a. Water 

b. Cast-iron 

c. Aluminium 

d. Type metal 

Answer- Type metal

Que- Glycol is added to aviation gasoline because it 

a. Reduces evaporation of petrol 

b. Increases efficiency of petrol 

c. Prevents freezing of petrol 

d. Reduces consumption of petrol 

Answer- Prevents freezing of petrol

Que- Which is the heaviest metal among the following? 

a. Gold 

b. Silver 

c. Iron 

d. Copper 

Answer- Gold

Que- The wire of flash bulbs is made up of 

a. Mg 

b. Ba 

c. Cu 

d. Ag 

Answer- Mg

Que- Which among the following is found in chlorophyll ? 

a. Ca2+ 

b. Mg2+ 

c. Fe2+ 

d. Al3+ 

Answer- Mg2+

Que- Copper substances when exposed to air gains a green coating due to the formation of: 

a. CuO 

b. CuCO3 Cu(OH)2 

c. CuSO4 

d. Cu(NO3)2 

Answer- CuCO3 Cu(OH)2

Que- Browning of paper in old books is caused by 

a. Frequent use 

b. Lack of aeration 

c. Collection of dust 

d. Oxidation of cellulose 

Answer- Oxidation of cellulose

Que- Catalyst is a substance which 

a. Increases the rate of the reaction 

b. Decreases the rate of reaction 

c. Has no action on the rate of the reaction 

d. None of these 

Answer- None of these

Que- When quick lime is added to water 

a. Heat is liberated 

b. Heat is absorbed 

c. Temperature decreases 

d. No heat change takes place 

Answer- Heat is liberated

Que- What is the element that is in the highest percentage in the composition of the earth ? 

a. Silicon 

b. Oxygen 

c. Magnesium 

d. Iron 

Answer- Oxygen

Que- The structure of (HPO3)3 is 

a. Linear 

b. Tetrahedral 

c. Cyclic 

d. Octahedral 

Answer- Cyclic

Que- Spontaneous change is one in which there is: 

a. A lowering of entropy 

b. A lowering of free energy 

c. Increase in free energy 

d. An increase in Internal energy 

Answer- A lowering of free energy

Que- Which of the following kinds of spectroscopy can provide information on the energy difference between the initial and final states rather the energy levels involved in the transition? 

a. UV absorption spectroscopy 

b. UV photoelectron spectroscopy 

c. Infrared absorption spectroscopy 

d. Rotational spectroscopy 

Answer- UV photoelectron spectroscopy

Que- When ice cubes are made, the entropy of water 

a. Does not change 

b. Decreases 

c. Increases 

d. May either increase or decrease depending on the process used 

Answer- Decreases

Que- Warming ammonium chloride with sodium hydrochloride in a test tube is an example of 

a. Open system 

b. Closed system 

c. Isobaric system 

d. Isothermal system 

Answer- Open system

Que- Which of the following partially miscible liquid pairs has both lower and upper critical solution temperature? 

a. Water and Phenol 

b. Aniline and n-hexane 

c. Glycerine and m-toluene 

d. Water and diethyl aniline 

Answer- Glycerine and m-toluene

Que- The aprotic solvent is 

a. H2O 

b. C6H6 

c. HF 

d. NH3 

Answer- HF

Que- Which of the following has the highest lattice energy? 

a. KF 

b. CsF 

c. NaF 

d. RbF 

Answer- NaF

Que- Which of the following substance is highly plastic ? 

a. Quartz 

b. Mica 

c. Granite 

d. Clay 

Answer- Clay

Que- Soldering of two metals is possible because of the property of : 

a. Viscosity 

b. Osmosis 

c. Cohesion 

d. Surface tension 

Answer- Cohesion

Que- Which of the following elements is not present in stainless steel? 

a. Iron 

b. Tungsten 

c. Chromium 

d. Nickel 

Answer- Tungsten

Que- Which one of the following minerals is found in pure form? 

a. Iron 

b. Copper 

c. Bauxite 

d. Manganese 

Answer- Copper

Que- What is the principal ore of aluminium ? 

a. Dolomite 

b. Copper 

c. Lignite 

d. Bauxite 

Answer- Bauxite

Que- Burning pyrites ore gives out 

a. Carbon dioxide gas 

b. Sulphur dioxide gas 

c. Nitrogen dioxide gas 

d. Nitric oxide gas 

Answer- Sulphur dioxide gas

Que- Which one of the following pairs is not correctly matched? 

a. Haematite : Copper 

b. Bauxite : Aluminium 

c. Monazite : Thorium 

d. Pitchblende : Uranium 

Answer- Haematite : Copper

Que- The substance most commonly used as a food preservative is 

a. Sodium carbonate 

b. Tartaric acid 

c. Acetic acid 

d. Sodium salt of benzoic acid 

Answer- Sodium salt of benzoic acid

Que- Curd is sour due to presence of 

a. Tartaric acid 

b. Lactic acid 

c. Acetic acid 

d. Oxalic acid 

Answer- Lactic acid

Que- Drinking soda is 

a. Alkaline 

b. Acidic 

c. Neutral 

d. Oxidant 

Answer- Acidic

Que- Which of the following has pH value 7? 

a. Pure Water 

b. H2SO4 

c. Sodium Carbonate 

d. HCl 

Answer- Pure Water

Que- Muscle fatigue is caused by the accumulation of : 

a. Pyruvic acid 

b. Lactic acid 

c. Oxalacetic acid 

d. Uric acid 

Answer- Lactic acid

Que- The main buffer system of the human blood is 

a. H2CO3 - HCO3 

b. H2CO3 - CO32- 



Answer- H2CO3 - HCO3

Que- The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is 

a. helium 

b. ozone 

c. oxygen 

d. methane 

Answer- ozone

Que- The most commonly used bleaching agent is 

a. alcohol 

b. carbon dioxide 

c. chlorine 

d. sodium chlorine 

Answer- chlorine

Que- The nucleus of a hydrogen atom consists of 

a. 1 proton only 

b. 1 proton + 2 neutron 

c. 1 neutron only 

d. 1 electron only 

Answer- 1 proton only

Que- The heat required to raise the temperature of body by 1 K is called 

a. specific heat 

b. thermal capacity 

c. water equivalent 

d. None of the above 

Answer- thermal capacity

Que- The gas produced in marshy places due to decomposition of vegetation is 

a. Carbon monoxide 

b. Carbon dioxide 

c. Sulphur dioxide 

d. Methane 

Answer- Methane

Que- Organic compounds are 

a. Covalent compounds 

b. Ionic compounds 

c. Co-ordination compounds 

d. Interstitial compounds 

Answer- Covalent compounds

Que- Vinegar is an aqueous solution of 

a. Oxalic acid 

b. Citric acid 

c. Hydrochloric acid 

d. Acetic acid 

Answer- Acetic acid

Que- Two elements which can form a large number of compounds are 

a. Carbon and Hydrogen 

b. Carbon and Nitrogen 

c. Carbon and Oxygen 

d. Carbon and Sulphur 

Answer- Carbon and Hydrogen

Que- Alcoholic (– OH) group can be identified by : 

a. Tollen's Reagent Test 

b. Esterification Test 

c. FeCl3Test 

d. Ozonolysis Reaction 

Answer- FeCl3Test

Que- Which of the following vitamins is generally excreted by human in urine? 

a. Vitamin B 

b. Vitamin C 

c. Vitamin D 

d. None of these 

Answer- None of these

Que- The presence of Cobalt in Vitamin B12 was established for the first time by 

a. Hydrolysis test 

b. Spectroscopy 

c. Borax-Bead test 

d. Sodium Nitroprusside test 

Answer- Spectroscopy

Que- What is the second largest component in milk ? 

a. Fat 

b. Minerals 

c. Water 

d. Sugar 

Answer- Fat

Que- Which among the following is a carbohydrate ? 

a. Nylon 

b. Cane-sugar 

c. Turpentine 

d. Hydrogen peroxide 

Answer- Cane-sugar

Que- How many atoms of oxygen are in a glucose molecule? 

a. 3 

b. 4 

c. 6 

d. 10 

Answer- 6

Que- The common name of sodium bicarbonate is 

a. Soda ash 

b. Baking soda 

c. Soda lime 

d. Baking powder 

Answer- Baking soda

Que- Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid ? 

a. Methylene blue 

b. Methyl red 

c. Phenolphthaline 

d. Methyl orange 

Answer- Methyl orange

Que- Alum stops bleeding in minor cuts because of 

a. Solvation 

b. Emulsion 

c. Dialysis 

d. Coagulation 

Answer- Coagulation

Que- The chemical name of 'Hypo' commonly used in photography is 

a. Sodium thiosulphate 

b. Silver nitrate 

c. Sodium nitrate 

d. Silver iodide 

Answer- Sodium thiosulphate

Que- Interveinal necrotic spots on leaves appear due to 

a. HF injury 

b. SO2 injury 

c. NO2 injury 

d. O3 injury 

Answer- SO2 injury

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

a. Ethylene 

b. Acetylene 

c. Ethane 

d. Methane 

Answer- Ethylene

Que- The natural source of hydrocarbon is 

a. Crude oil 

b. Biomass 

c. Coal 

d. Carbohydrates 

Answer- Crude oil

Que- By which organic compound all the oils are known ? 

a. Carbohydrate 

b. Protein 

c. Hydrocarbon 

d. Ester 

Answer- Hydrocarbon

Que- Which of the following elements is found in all organic compounds? 

a. Carbon 

b. Calcium 

c. Nitrogen 

d. Oxygen 

Answer- Carbon

Que- Ethanol containing 5% water is known as : 

a. Dilute alcohol 

b. Power alcohol 

c. Rectified spirit 

d. Absolute alcohol 

Answer- Rectified spirit

Que- An alloy used in making heating elements for electric heating device is 

a. Solder 

b. Alloy Steel 

c. Nichrome 

d. German Silver 

Answer- Nichrome

Que- Which of the following is an iron ore ? 

a. Bauxite 

b. Magnetite 

c. Lignite 

d. Nitrite 

Answer- Magnetite

Que- The important metal used with iron to produce stainless steel is 

a. Aluminium 

b. Chromium 

c. Tin 

d. Carbon 

Answer- Chromium

Que- Which of the following metals form an amalgam with other metals ? 

a. Lead 

b. Tin 

c. Zinc 

d. Mercury 

Answer- Mercury

Que- ________ gives hardness to stainless steel. 

a. Zinc 

b. Lead 

c. Carbon 

d. Tin 

Answer- Carbon

Que- When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to 

a. SO3 

b. SO2 

c. NO2 

d. N2O 

Answer- NO2

Que- Wax used for making candle is chemically a mixture of 

a. Aliphatic hydrocarbons 

b. Aromatic hydrocarbons 

c. Cyclic hydrocarbons 

d. Aliphatic and aromatic hydrocarbons 

Answer- Aliphatic hydrocarbons

Que- Adding Cl2 to benzene in the presence of AlCl3 is an example of : 

a. Elimination reaction 

b. Substitution reaction 

c. None of the options 

d. Addition reaction 

Answer- Substitution reaction

Que- Benzene cannot undergo : 

a. Substitution 

b. Addition 

c. Elimination 

d. Oxidation 

Answer- Elimination

Que- Which one is the simplest aromatic hydrocarbon? 

a. Aspirin 

b. Benzene 

c. Chloride 

d. Picric acid 

Answer- Benzene

Que- Rock salt is a mineral containing 

a. Potassium 

b. Magnesium 

c. Sodium 

d. Iron 

Answer- Sodium

Que- Baking soda is : 

a. Potassium carbonate 

b. Sodium hydroxide 

c. Sodium carbonate 

d. Sodium bicarbonate 

Answer- Sodium bicarbonate

Que- Sodium Carbonate is commonly known as 

a. Baking Soda 

b. Washing Soda 

c. Caustic Soda 

d. Caustic Potash 

Answer- Washing Soda

Que- Brine refers to : 

a. Salt water 

b. Sweet water 

c. Pure water 

d. Starch water 

Answer- Salt water

Que- The chemical name of baking soda is 

a. Sodium carbonate 

b. Sodium bicarbonate 

c. Sodium chloride 

d. Sodium nitrate 

Answer- Sodium bicarbonate

Que- Which one of the following group of gases contributes to the 'Green House Effect'? 

a. Carbon dioxide and Methane 

b. Ammonia and Ozone 

c. Carbon monoxide and Sulphur dioxide 

d. Carbon tetraflouride and Nitrous oxide 

Answer- Carbon dioxide and Methane

Que- Black lung disease occurs in people working in 

a. Electroplating industry 

b. Organic solvents industry 

c. Paint manufacturing industry 

d. Coal mines 

Answer- Coal mines

Que- The least preferred technique in the disposal of Municipal Solid Waste is 

a. Incineration 

b. Composting 

c. Land filling 

d. Bricketting 

Answer- Bricketting

Que- Which one of the following was used as a chemical weapon in the first world war ? 

a. Carbon monoxide 

b. Hydrogen cyanide 

c. Mustard gas 

d. Water gas 

Answer- Mustard gas

Que- The depletion of ozone layer is due to 

a. Chlorofluorocarbons  

b. Carbon dioxide 

c. Sulphur dioxide 

d. Ethane 

Answer- Chlorofluorocarbons 

Que- Sour taste of lemon is due to the presence of which of the following ? 

a. Citric acid 

b. Acetic acid 

c. Oxalic acid 

d. Formic acid 

Answer- Citric acid

Que- pH scale ranges from 

a. 0 – 7 

b. 8 – 14 

c. 0 – 14 

d. None 

Answer- 0 – 14

Que- Normal rainwater has a pH level of 

a. 3.2 

b. 5.6 

c. 6.3 

d. 8.3 

Answer- 5.6

Que- Which one of the following is used as preservative for foodstuff ? 

a. Sodium Benzoate 

b. Picric acid 

c. Glycerine 

d. Sodium Chloride 

Answer- Sodium Benzoate

Que- The acid which fails to liberate carbon dioxide from sodium bicarbonate is : 

a. Acetic acid 

b. Formic acid 

c. Carbonic acid 

d. Sulphuric acid 

Answer- Sulphuric acid

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

a. Nitrous oxide 

b. Carbon dioxide 

c. Chlorofluorocarbon 

d. Sulphur dioxide 

Answer- Chlorofluorocarbon

Que- Nitrogen fixation is a process of 

a. Assimilation of nitrate 

b. Utilisation of nitrogen gas 

c. Conversion of organic nitrogen to proteins 

d. Conversion of molecular nitrogen to ammonia 

Answer- Conversion of molecular nitrogen to ammonia

Que- Greenhouse effect is caused by 

a. Nitrogen 

b. Carbon dioxide 

c. Carbon monoxide 

d. Nitrogen dioxide 

Answer- Carbon dioxide

Que- The lowest layer of earth's atmosphere is 

a. Troposphere 

b. Stratosphere 

c. Mesosphere 

d. Ionosphere 

Answer- Troposphere

Que- Earth’s atmosphere is an envelope of gases extending to a height of 

a. 100 km 

b. 150 km 

c. 200 km 

d. 300 km 

Answer- 200 km

Que- The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is 

a. carbon 

b. hydrogen 

c. oxygen 

d. nitrogen 

Answer- oxygen

Que- The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is 

a. chain isomerism 

b. functional group isomerism 

c. positional isomerism 

d. metamerism 

Answer- positional isomerism

Que- The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind? 

a. 1/6 

b. 1/3 

c. 1/8 

d. 1/4 

Answer- 1/8

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