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- 

c. CH3COOH - CH3COO- 

d. NH2CONH2 - NH2CONH+ 


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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