Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- Total number of naturally occurring elements 

a. 62 

b. 92 

c. 98 

d. 110 


Answer- 92


Que- The coloured discharge tubes for advertisement mainly contain 

a. Xenon 

b. Argon 

c. Helium 

d. Neon 


Answer- Neon


Que- Natural rubber is a polymer of 

a. Vinyl acetate 

b. Propene 

c. Isoprene 

d. Styrene 


Answer- Isoprene


Que- What is a Bakelite ? 

a. Solution 

b. Acid 

c. Base 

d. Polymer 


Answer- Polymer


Que- What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper ? 

a. There is a crackling sound 

b. There is a violent explosion. 

c. There is no reaction. 

d. The paper ignites 


Answer- There is a violent explosion.


Que- Silver nitrate solution is kept in brown bottles in laboratory because 

a. It reacts with ordinary white bottles 

b. Brown bottles stops the passage of light through it 

c. Brown bottles do not react with it 

d. Brown bottles react with it 


Answer- Brown bottles stops the passage of light through it


Que- Which colour is produce by Arsenic during flame test? 

a. Green 

b. Red 

c. Crimson 

d. Blue 


Answer- Blue


Que- The natural resource, known as black gold is 

a. Coal 

b. Lead 

c. Tin 

d. Platinum 


Answer- Coal


Que- The chief constituent of natural gas is: 

a. Methane 

b. Helium 

c. Nitrogen 

d. Propane 


Answer- Methane


Que- The resources which can be used continuously, year-after-year are called 

a. Biotic 

b. Abiotic 

c. Non-renewable 

d. Renewable 


Answer- Renewable


Que- The highest volume of gases in lower atmosphere is comprised of 

a. Hydrogen 

b. Carbon dioxide 

c. Oxygen 

d. Nitrogen 


Answer- Nitrogen


Que- What is the maximum Water Vapour content in the atmosphere? 

a. 2 to 3 per cent 

b. 3 to 4 per cent 

c. 4 to 5 per cent 

d. 5 to 6 per cent 


Answer- 3 to 4 per cent


Que- Which of the process is known as nitrification? 

a. Reaction of Nitrogen Monoxide with oxygen to form nitric acid 

b. Reaction of nitrogen dioxide with water to form nitric acid 

c. Conversion of ammonia to nitrites 

d. Conversion of nitrite to nitric oxide 


Answer- Conversion of ammonia to nitrites


Que- Which is not a green house gas ? 

a. CO2 

b. CH4 

c. N2O 

d. Chlorofluorocarbons 


Answer- N2O


Que- Formation of ozone hole is maximum over 

a. Africa 

b. India 

c. Antarctica 

d. Europe 


Answer- Antarctica


Que- Ozone saves the biosphere by absorbing high energy radiations called ________ . 

a. Infra-red (IR) 

b. Gamma rays 

c. Ultraviolet rays (UV) 

d. X–rays 


Answer- Ultraviolet rays (UV)


Que- Which one of the following is not a cause for present global warming and climate change ? 

a. CFC emission 

b. Carbon dioxide emission 

c. Deforestation 

d. Methane emission 


Answer- Deforestation


Que- Which one of the following elements is least likely to be found in commercial fertilisers? 

a. Nitrogen 

b. Phosphorous 

c. Potassium 

d. Silicon 


Answer- Silicon


Que- Which of the following is caused by the higher concentration of Nitrogen and Phosphorous ? 

a. Eutrophication 

b. Hardness 

c. Alkalinity 

d. Acidity 


Answer- Eutrophication


Que- If the sewage is fully oxidized, the nitrogen is in the form of 

a. Nitrites 

b. Ammonia 

c. Nitramines 

d. Nitrates 


Answer- Nitrates


Que- If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by 

a. Mercury 

b. Lead 

c. Iron 

d. Arsenic 


Answer- Lead


Que- Extensively used nitrogenous fertilizer is 

a. Ammonium nitrate 

b. Urea 

c. Ammonium sulphate 

d. Nitro-lime 


Answer- Urea


Que- What is the atomic number of mercury? 

a. 32 

b. 41 

c. 63 

d. 80 


Answer- 80


Que- Which of the following molecules has a bond order of 2.5? 

a. HCL 

b. CO 

c. F2 

d. NO 


Answer- F2


Que- An element of atomic no. 29 belongs to 

a. S-block 

b. D-block 

c. P-block 

d. F-block 


Answer- D-block


Que- Which metal is the heaviest in periodic table among the following ? 

a. Os 

b. Pt 

c. Pb 

d. W 


Answer- Os


Que- Ruby and sapphire are oxides of 

a. Copper 

b. Tin 

c. Iron 

d. Aluminium 


Answer- Aluminium


Que- One carat of diamond is equal to 

a. 100 mg 

b. 150 mg 

c. 200 mg 

d. 250 mg 


Answer- 200 mg


Que- Carbon dioxide is 

a. A reducing agent 

b. An oxidising agent 

c. A dehydrating agent 

d. A bleaching agent 


Answer- A reducing agent


Que- Hardest allotrope of carbon is 

a. Diamond 

b. Graphite 

c. Coke 

d. Lamp black 


Answer- Diamond


Que- Diamond is lustrous because 

a. It is colourless 

b. It is hard 

c. It is pure 

d. Its refractive index is high 


Answer- Its refractive index is high


Que- Dry ice is 

a. Solid ammonia 

b. Solid sulphur dioxide 

c. Dry carbon dioxide gas 

d. Solid carbon dioxide 


Answer- Solid carbon dioxide


Que- Yellow Cake an item of smuggling across border is 

a. A crude from of heroin 

b. A crude from of cocaine 

c. Uranium oxide 

d. Unreformed gold 


Answer- Uranium oxide


Que- The transuranium elements are the chemical elements with atomic numbers greater than 

a. 86 

b. 89 

c. 92 

d. 96 


Answer- 92


Que- Which of the following elements is non-radioactive ? 

a. Uranium 

b. Thorium 

c. Plutonium 

d. Zirconium 


Answer- Zirconium


Que- Which of the following is used in dating archaeological findings ? 

a. 92235U 

b. 614C 

c. 13H 

d. 818O 


Answer- 614C


Que- German silver used for making utensils is an alloy of 

a. Copper, silver, nickel 

b. Copper, zinc, nickel 

c. Copper, zinc, aluminium 

d. Copper, nickel, aluminium 


Answer- Copper, zinc, nickel


Que- The coordination number of body centered atom in cubic structure is 

a. 4 

b. 6 

c. 8 

d. 10 


Answer- 8


Que- The product, 9-nitroanthracene is obtained from anthracene by the action of 

a. Nitric acid and acetic anhydride 

b. Nitric acid and ethyl alcohol 

c. Nitric acid and acetic acid 

d. Nitric acid in excess 


Answer- Nitric acid and acetic anhydride


Que- Cyanide poisoning causes death in seconds because 

a. It denatures enzymes of the heart/muscle 

b. It breaks the electron transport chain 

c. It causes Lysis of red blood cells 

d. It causes cardiac arrest 


Answer- It causes cardiac arrest


Que- Peroxyacetyl nitrate is a 

a. Acidic dye 

b. Plant hormone 

c. Vitamin 

d. Secondary pollutant 


Answer- Secondary pollutant


Que- What is used in storage batteries? 

a. Copper 

b. Tin 

c. Lead 

d. Zinc 


Answer- Lead


Que- Match the List-I with List-II and select the correct answer using the codes given below the listsList-I (Green house gas)List-II(Major source)F.Carbondioxide1.Enteric fermentation in cattleG.Methane2.Burning of fossilH.Chloroflro carbons3.Mercury compounds in waste waterJ.Nitrous oxide4.Nylon production 5.Air conditioner and refrigeration unitsCodes :FGHJA.2154B.3421C.3241D.1234 

a. A 

b. B 

c. C 

d. D 


Answer- A


Que- Acid rain is caused by 

a. SO2 and particulates 

b. NO2and particulates 

c. CO2and CFCs 

d. SO2 and NO2 


Answer- SO2 and NO2


Que- The Bhopal gas tragedy was caused by the gas 

a. Methyl chloride 

b. Methyl Isocyanide 

c. Methyl Isocyanate 

d. Methyl Cyanide 


Answer- Methyl Isocyanate


Que- The Bhopal tragedy was caused by the gas 

a. Phosgene 

b. Carbon monoxide 

c. Methyl isocyanate 

d. Chlorine 


Answer- Methyl isocyanate


Que- Which of the following caused radioactive pollution along the coast of Kerala ? 

a. Plutonium 

b. Zinc 

c. Thorium 

d. Radium 


Answer- Thorium


Que- When a spoon is to be electroplated with nickel the spoon is 

a. Dipped in a nickel sulphate solution 

b. Made anode and a pure nickel rod, the cathode 

c. Made cathode and a pure nickel red, the anode 

d. Coated with nickel sulphate and dried 


Answer- Made cathode and a pure nickel red, the anode


Que- Conversion of chemical energy into electrical energy occurs in 

a. Atomic bombs 

b. Dynamo 

c. A battery 

d. Electric heaters 


Answer- A battery


Que- The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called : 

a. Zinc plating 

b. Alloy formation 

c. Vulcanization 

d. Galvanization 


Answer- Galvanization


Que- Galvanization of iron is carried out using 

a. Zinc 

b. Tin 

c. Copper 

d. Chromium 


Answer- Zinc


Que- The working of a dry cell is based on 

a. Decomposition reaction 

b. Spontaneous oxidation-reduction reaction 

c. Combination reaction 

d. Electrolysis 


Answer- Electrolysis


Que- The addition of gypsum to portland cement helps in : 

a. Increasing the strength of cement 

b. Rapid setting of cement 

c. Preventing rapid setting of cement 

d. Reduction in the cost of cement 


Answer- Preventing rapid setting of cement


Que- Which gas is most stable at room temperature? 

a. H2 

b. N2 

c. F2 

d. O2 


Answer- N2


Que- Which of the following is used as a preservative to protect processed food? 

a. Sodium sulphate 

b. Saccharin 

c. BHT 

d. Sodium metabisulphite 


Answer- Sodium metabisulphite


Que- Chemical composition of cement is 

a. Limestone and Clay 

b. Limestone, Clay and Gypsum 

c. Limestone and Gypsum 

d. Clay and Gypsum 


Answer- Limestone, Clay and Gypsum


Que- Which one of the following elements is used in the manufacture of fertilizers ? 

a. Fluorine 

b. Potassium 

c. Lead 

d. Aluminium 


Answer- Potassium


Que- Milk is 

a. Emulsion 

b. Suspension 

c. Foam 

d. Gel 


Answer- Emulsion


Que- Milk is a natural 

a. Solution 

b. Emulsion 

c. Mixture 

d. Suspension 


Answer- Emulsion


Que- Emulsifier is an agent which 

a. Accelerates the dispersion 

b. Homogenizes the emulsion 

c. Stabilizes an emulsion 

d. Aids the flocculation of emulsion 


Answer- Stabilizes an emulsion


Que- An emulsifier is an agent which 

a. Stabilises an emulsion 

b. Aids the flocculation of an emulsion 

c. Accelerates the dispersion 

d. Homogenises an emulsion 


Answer- Stabilises an emulsion


Que- Muddy water is treated with alum in purification process, it is termed as : 

a. Emulsification 

b. Absorption 

c. Adsorption 

d. Coagulation 


Answer- Coagulation


Que- Carborundum is another name of 

a. Silicon carbide 

b. Silicon oxide 

c. Calcium carbide 

d. Calcium oxide 


Answer- Silicon carbide


Que- German silver is an alloy of 

a. Copper, nickel and silver 

b. Silver, copper and aluminium 

c. Zinc, copper and nickel 

d. Zinc, silver and copper 


Answer- Zinc, copper and nickel


Que- Which one of the following does not contain Silver ? 

a. Ruby Silver 

b. Lunar Caustic 

c. German Silver 

d. Horn Silver 


Answer- German Silver


Que- Type metal used in printing press is an alloy of 

a. Lead and copper 

b. Lead and antimony 

c. Lead and bismuth 

d. Lead and zinc 


Answer- Lead and antimony


Que- Ultra purification of a metal is done by : 

a. Slugging 

b. Zone melting 

c. Smelting 

d. Leaching 


Answer- Zone melting


Que- Silicon is used in 

a. Solar energy devices 

b. Semiconductors 

c. Transistors 

d. All of these 


Answer- All of these


Que- Which of the inert gases can form compounds? 

a. Helium 

b. Xenon 

c. Krypton 

d. Argon 


Answer- Xenon


Que- Vulcanized rubber contains sulphur 

a. 2% 

b. 3-5% 

c. 7-9% 

d. 10-15% 


Answer- 3-5%


Que- Which of the following alloy is used in making magnet ? 

a. Duralumin 

b. Stainless steel 

c. Alnico 

d. Magnalium 


Answer- Alnico


Que- In its reaction with silver nitrate, C2H2 shows 

a. Oxidising property 

b. Reducing property 

c. Basic property 

d. Acidic property 


Answer- Acidic property


Que- Major portion of the earth’s crust is mainly constituted by 

a. Oxygen and Iron 

b. Oxygen and Silicon 

c. Silicon and Iron 

d. Silicon and Aluminium 


Answer- Oxygen and Silicon


Que- In surgery, metal pins are used for joining together broken bones. These metal pins remain uncorroded in the body. What is the material of these pins? 

a. Copper 

b. Iron 

c. Aluminium 

d. Titanium 


Answer- Titanium


Que- Name two elements that find wide application in transistor industry. 

a. Silicon and Germanium 

b. Carbon and Platinum 

c. Iridium and Germanium 

d. Tungsten and Platinum 


Answer- Silicon and Germanium


Que- Which one is the naturally occuring heaviest element? 

a. Mercury 

b. Thorium 

c. Uranium 

d. Protactinium 


Answer- Uranium


Que- Which of the following will replace hydrogen from acids to form salts ? 

a. S 

b. Na 

c. Ag 

d. P 


Answer- Na


Que- The main component of liquid bleach is: 

a. Sodium chloride 

b. Sodium hypochlorite 

c. Hydrochloric acid 

d. Sodium hypochlorate 


Answer- Sodium hypochlorite


Que- Quartz is made of 

a. Calcium Sulphate 

b. Calcium Silicate 

c. Sodium Sulphate 

d. Sodium Silicate 


Answer- Sodium Silicate


Que- What is the product formed when sodium bicarbonate is heated strongly? 

a. Sodium Carbonate 

b. Sodium Hydroxide 

c. Sodium Peroxide 

d. Sodium Monoxide 


Answer- Sodium Carbonate


Que- Cement is formed by strongly heating a mixture of 

a. Limestone and graphite 

b. Limestone and clay 

c. Chalk and graphite 

d. Clay and graphite 


Answer- Limestone and clay


Que- Persons working in cement plants and lime stone quarries are prone to disease like 

a. Cancer 

b. Asthma 

c. Silicosis 

d. Pneumoconiosis 


Answer- Silicosis


Que- Sodium vapour lamps glow with yellow colour. This is due to 

a. sublimation of sodium to emit yellow colour 

b. The emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum 

c. The low ionisation energy of sodium 

d. Its ability to absorb all other colours except yellow 


Answer- The emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum


Que- Which amidst the following is not a gem stone ? 

a. Cat's-eye 

b. Topaz 

c. Opal 

d. Pearl 


Answer- Cat's-eye


Que- Calcium salts used as fertilizer is : 

a. Calcium Carbide 

b. Calcium Carbonate 

c. Calcium Cyanide 

d. Calcium Sulphate 


Answer- Calcium Sulphate


Que- Aluminium salt commonly used to stop bleeding is 

a. Aluminium nitrate 

b. Aluminium sulphate 

c. Aluminium Chloride 

d. Potash alum 


Answer- Aluminium sulphate


Que- In silvery paints, the main constituent present is 

a. Aluminium powder 

b. Silver powder 

c. Lead powder 

d. White lead 


Answer- Aluminium powder


Que- Which of the following appeared to be with a significant potential for accumulation through food chains ?  

a. DDT 

b. Parathion 

c. Lindane 

d. Carbaryl 


Answer- DDT


Que- Higher concentration of nitrogen dioxide in atmosphere air causes 

a. Cancer 

b. Bronchitis 

c. Asphyxiation 

d. Corrosion 


Answer- Bronchitis


Que- Which of the following in automobile exhaust can cause cancer? 

a. Oxides of nitrogen 

b. Carbon monoxide 

c. Lead 

d. Polyclinic hydrocarbons 


Answer- Polyclinic hydrocarbons


Que- White lung cancer is caused by 

a. Asbestos 

b. Silica 

c. Textiles 

d. Paper 


Answer- Textiles


Que- Which of the following is a man-made source of air pollution ? 

a. Automobile exhaust 

b. Forest fire 

c. Bacterial action in soil and swamp areas 

d. All of the above 


Answer- Automobile exhaust


Que- Which of the following pollutants is main product of automobile exhaust ? 

a. CO 

b. CO2 

c. NO 

d. Hydrocarbons 


Answer- NO


Que- The smog is essentially caused by the presence of 

a. O3 and N2 

b. O2 and N2 

c. Oxides of N and S 

d. O2 and O3 


Answer- Oxides of N and S


Que- The depletion in Ozone layer is caused by ________ . 

a. Nitrous oxide 

b. Carbon dioxide 

c. Chlorofluorocarbons 

d. Methane 


Answer- Chlorofluorocarbons


Que- Which of the following is the maximum number of electrons that can be present in M-shell? 

a. 2 

b. 8 

c. 18 

d. 32 


Answer- 18


Que- Atoms of different elements have 

a. Same atomic number and same electronic configuration 

b. Different atomic number and same eletronic configu-ration 

c. Different atomic number and different number of valence electrons 

d. Same number of electrons and neutrons 


Answer- Different atomic number and different number of valence electrons


Que- A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? 

a. From brown to blue-black 

b. From brown to orange-red 

c. From blue to pink 

d. From pink to blue-green 


Answer- From brown to blue-black


Que- An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a : 

a. Power transmittor 

b. Battery 

c. Uninterrupted power supply (UPS) 

d. Generator 


Answer- Battery


Que- The metals commonly used for electroplating are 

a. Gold, Sodium and Chromium 

b. Chromium, Copper and Nickel 

c. Nickel, Lead and Chromium 

d. Gold, Sodium and Potassium 


Answer- Chromium, Copper and Nickel

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