Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- The important ore of aluminium is 

a. Bauxite 

b. Cryolite 

c. Fluorspar 

d. Haematite 


Answer- Bauxite


Que- The National Chemical Laboratory is situated in 

a. New Delhi 

b. Bangalore 

c. Pune 

d. Patna 


Answer- Pune


Que- Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be 

a. 2 : 16 : 2 

b. 2 : 16 : 1 

c. 1 : 16 : 2 

d. 1 : 1 : 1 


Answer- 1 : 16 : 2


Que- The mass number of an atom is equal to 

a. the number of protons 

b. the number of protons and electrons 

c. the number of nucleons 

d. the number of neutrons 


Answer- the number of nucleons


Que- The water pollution in river is measured by the dissolved amount of 

a. Chlorine 

b. Ozone 

c. Nitrogen 

d. Oxygen 


Answer- Oxygen


Que- Ultraviolet rays can be used in water treatment as 

a. Flocculator 

b. Precipitator 

c. Hydrolyser 

d. Disinfectant 


Answer- Disinfectant


Que- Tar roads get damaged if there is 

a. Stagnation of water on road 

b. Heavy traffic 

c. No maintenance 

d. No sloping 


Answer- Stagnation of water on road


Que- Aerated water contains 

a. SO2 

b. NO2 

c. H2 

d. CO2 


Answer- CO2


Que- The BOD values of water indicate the 

a. Amount of organic debris 

b. Amount of oxygen used for biochemical oxidation 

c. Amount of oxygen used for biochemical reduction 

d. Amount of ozone used for biochemical oxidation 


Answer- Amount of oxygen used for biochemical oxidation


Que- The most reactive among the halogens is 

a. Fluorine 

b. Chlorine 

c. Bromine 

d. Iodine 


Answer- Fluorine


Que- Which one element has the lowest electronegativity value 

a. Fluorine 

b. Chlorine 

c. Francium 

d. Radium 


Answer- Francium


Que- Which one element has the highest electronegativity value 

a. Lithium 

b. Nitrogen 

c. Chlorine 

d. Fluorine 


Answer- Fluorine


Que- The element with highest ionization potential is 

a. Oxygen 

b. Carbon 

c. Helium 

d. Boron 


Answer- Helium


Que- Which of the following has no unit? 

a. Electronegativity 

b. Electron affinity 

c. Ionization energy 

d. Excitation potential 


Answer- Electronegativity


Que- Which of the following vegetable oils does not contain essential fatty acids ? 

a. Sunflower oil 

b. Mustard oil 

c. Coconut oil 

d. Groundnut oil 


Answer- Sunflower oil


Que- The example of oligosaccharide is 

a. Sucrose 

b. Glucose 

c. Ribose 

d. Cellulose 


Answer- Sucrose


Que- Number of hydrogen atoms in a Glucose molecule is 

a. 6 

b. 8 

c. 12 

d. 14 


Answer- 12


Que- The residue left after extracting juice from sugarbeet and sugarcane is called 

a. Molasses 

b. Bagasse 

c. Whey 

d. Biomass 


Answer- Bagasse


Que- Nitrogen is an essential constituent of all : 

a. Fats 

b. Proteins 

c. Vitamins 

d. Carbohydrates 


Answer- Proteins


Que- A subshell with l = 2 can take up 

a. 3 electron 

b. 5 electron 

c. 8 electron 

d. 10 electron 


Answer- 10 electron


Que- Two electrons in an orbital are differentiated by which of the following ? 

a. Magnetic quantum number 

b. Spin quantum number 

c. Principal quantum number 

d. Azimuthal quantum number 


Answer- Spin quantum number


Que- When cathode rays strike a target of high atomic weight, they give rise to 

a. alpha-rays 

b. beta and gamma rays 

c. X-rays 

d. Positive rays 


Answer- X-rays


Que- How many electrons can be accommodated in d-orbital? 

a. 3 

b. 6 

c. 8 

d. 10 


Answer- 10


Que- The scientist who experimentally proved the existence of positron is 

a. Fermi 

b. Anderson 

c. Bohr 

d. Bethe 


Answer- Anderson


Que- Which of the following phenomenon is considered responsible for Global Warming? 

a. Greenhouse effect 

b. Fire in coal mines 

c. Dry farming 

d. MonsoonE. Trade winds 


Answer- Greenhouse effect


Que- The nucleus of an atom consists of 

a. electrons and neutrons 

b. electrons and protons 

c. protons and neutrons 

d. All of the above 


Answer- protons and neutrons


Que- The number of moles of solute present in 1 kg of a solvent is called its 

a. molality 

b. molarity 

c. normality 

d. formality 


Answer- molality


Que- The most electronegative element among the following is 

a. sodium 

b. bromine 

c. fluorine 

d. oxygen 


Answer- fluorine


Que- The metal used to recover copper from a solution of copper sulphate is 

a. Na 

b. Ag 

c. Hg 

d. Fe 


Answer- Fe


Que- The first organic compound synthesised in the laboratory was 

a. Urea 

b. Uric acid 

c. Lactic acid 

d. Glucose 


Answer- Glucose


Que- Among the following, carbonate ore of Zinc is 

a. Zinc blende 

b. Calamine 

c. Sphalerite 

d. Zincite 


Answer- Calamine


Que- The metal used for making aircrafts and rockets is 

a. Lead 

b. Aluminium 

c. Nickel 

d. Copper 


Answer- Nickel


Que- The compound that has the least value for octane number is : 

a. 2-methyl heptane 

b. Iso-octane 

c. 2,2-dimethyl hexane 

d. N-heptane 


Answer- N-heptane


Que- The length of double bond is _______ than single bond. 

a. Shorter 

b. Longer 

c. Of same lenght 

d. None of the above 


Answer- Shorter


Que- ""Paramagnetism"" is the property of 

a. Paired electrons 

b. Completely filled electronics subshells 

c. Unpaired electrons 

d. Completely vacant electronic subshells 


Answer- Unpaired electrons


Que- The structure of NaCl crystal is 

a. Body centered cubic 

b. Face centered cubic 

c. Octahedral 

d. Square planar 


Answer- Face centered cubic


Que- Which of the following is a renewable source of energy ? 

a. Coal 

b. Geothermal power 

c. Natural gas 

d. Uranium 


Answer- Geothermal power


Que- Gobar gas contains mainly : 

a. Methane 

b. Ethylene 

c. Propylene 

d. Acetylene 


Answer- Methane


Que- Gobar gas mainly contains 

a. Carbon dioxide 

b. Carbon monoxide 

c. Hydrogen sulphide 

d. Methane 


Answer- Methane


Que- The main constituent of biogas is 

a. Oxygen 

b. Methane 

c. Acetic acid 

d. Methyl alcohol 


Answer- Methane


Que- An example of replenishable energy source is– 

a. Coal 

b. Petroleum 

c. Lignite 

d. Biomass 


Answer- Biomass


Que- Which of the following is used as non-stick coating for cooking utensils? 

a. Perspex 

b. Styrofoam 

c. Polystyrene 

d. Teflon 


Answer- Teflon


Que- The fibre least prone to catch fire is 

a. Nylon 

b. Polyester 

c. Cotton 

d. Terylene 


Answer- Cotton


Que- Which of the following is used to make light weight, but strong plastic ? 

a. Nylon 

b. Polythene 

c. Polyvinyl Chloride 

d. Methyl Methacrylate 


Answer- Polyvinyl Chloride


Que- Which of the following fibres catches fire least ? 

a. Nylon 

b. Cotton 

c. Rayon 

d. Terricot 


Answer- Cotton


Que- Non-stick kitchenwares are coated with 

a. PVC 

b. Graphite 

c. Teflon 

d. Silicon 


Answer- Teflon


Que- Which one of the following minerals is found in Monazite sand ? 

a. Potassium 

b. Uranium 

c. Thorium 

d. Sodium 


Answer- Thorium


Que- Which of the following is the main compound of voter ink? 

a. Silver nitrate 

b. Ammonium Chloride 

c. Silver Chloride 

d. Ammonium Nitrate 


Answer- Silver nitrate


Que- The heaviest naturally occurring element is: 

a. Mercury 

b. Polonium 

c. Thorium 

d. Uranium 


Answer- Uranium


Que- In which of the following ions , the colour is not due to d-d transition ?  

a. [Ti(H2O)6]3+ 

b. [CoF6]3+ 

c. [CrO4]2− 

d. [Cu(NH3)4]2+ 


Answer- [CrO4]2−


Que- What is Zeolite? 

a. Hydrated Aluminosilicate 

b. Hydrated Calcium Sulphate 

c. Dehydrated Aluminosilicate 

d. Dehydrated Calcium Sulphate 


Answer- Hydrated Aluminosilicate


Que- Laughing gas is 

a. Nitric oxide 

b. Nitrous oxide 

c. Nitrogen trioxide 

d. Nitrogen pentoxide 


Answer- Nitrous oxide


Que- Electric fuse is an alloy of 

a. Tin and lead 

b. Zinc and lead 

c. Copper and iron 

d. Carbon and tin 


Answer- Tin and lead


Que- Detergents used for cleaning clothes and utensils contain 

a. Nitrates 

b. Bicarbonates 

c. Sulphonates 

d. Bismuthates 


Answer- Sulphonates


Que- Which one of the following chemicals helps in fruit ripening? 

a. Ethephon 

b. Atrazine 

c. Isoproturan 

d. Malathion 


Answer- Ethephon


Que- Which of the following chemicals is used in photography ? 

a. Aluminium hydroxide 

b. Silver bromide 

c. Potassium nitrate 

d. Sodium chloride 


Answer- Silver bromide


Que- Atomic number is the number equal to 

a. Protons 

b. Electrons 

c. Neutrons 

d. None of the above 


Answer- Protons


Que- Rutherford’s scattering experiment proved the presence of 

a. Atoms in all matter 

b. Electrons in atoms 

c. Neutrons in atoms 

d. Nucleus in atoms 


Answer- Nucleus in atoms


Que- Number of neutrons in an atom of hydrogen is 

a. One 

b. Zero 

c. Two 

d. Three 


Answer- Zero


Que- The atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon ? 

a. 6 

b. 12 

c. 18 

d. Zero 


Answer- 6


Que- An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is 

a. 17 

b. 19 

c. 36 

d. 53 


Answer- 19


Que- Which one of the following contributes largely to the ‘green house effect’ ? 

a. Ozone 

b. Carbon monoxide 

c. Carbon dioxide 

d. Water vapour 


Answer- Water vapour


Que- An important green-house gas other than methane being produced from the agricultural fields is 

a. Nitrous oxide 

b. Ammonia 

c. Sulphur dioxide 

d. Arsine 


Answer- Nitrous oxide


Que- The gas which is mainly responsible for the green house effect is: 

a. Ozone 

b. Oxygen 

c. Carbon dioxide 

d. Carbon monoxide 


Answer- Carbon dioxide


Que- Chernobyl disaster is the result of pollution by 

a. Oil spill 

b. Acid rain 

c. Carbon dioxide 

d. Radioactive waste 


Answer- Radioactive waste


Que- ‘Aerosol’ is known as 

a. Suspended solid particles in air 

b. Pollutant gas, present in air 

c. Microbes, present in air 

d. Green house gas present in air 


Answer- Suspended solid particles in air


Que- The percentage of Nitrogen in Air is 

a. 0.94 

b. 0.03 

c. 78.03 

d. 85.02 


Answer- 78.03


Que- Air is said to be saturated when : 

a. It contains maximum content of water vapour 

b. Its pressure is minimum 

c. Its thickness is maximum 

d. It blows over the barren land 


Answer- It contains maximum content of water vapour


Que- For extinguishing fire, we use 

a. Hydrogen 

b. Carbon Monoxide 

c. Carbon Dioxide 

d. Marsh gas 


Answer- Carbon Dioxide


Que- Dry powder fire extinguishers contain 

a. Sand 

b. Sand and sodium carbonate 

c. Sand and potassium carbonate 

d. Sand and sodium bicarbonate 


Answer- Sand and sodium bicarbonate


Que- Dry ice is the solid form of : 

a. Air 

b. Carbon dioxide 

c. Nitrogen 

d. Water 


Answer- Carbon dioxide


Que- Detergents are 

a. Sodium salts of fatty acids 

b. Sodium salts of sulphonic acids 

c. Sodium salt of benzoic acid 

d. None of the above 


Answer- Sodium salts of sulphonic acids


Que- The metal compound commonly found in Sindhoor or Kumkum is based on 

a. Tin 

b. Lead 

c. Copper 

d. Zinc 


Answer- Lead


Que- Substance used as an anti freeze in radiators of automobiles is : 

a. Methyl alcohol and H2O 

b. Methyl alcohol 

c. Ethyl alcohol 

d. Ethyl alcohol and H2O 


Answer- Methyl alcohol and H2O


Que- Which of the following is used to remove rust stains on cloth? 

a. Kerosene 

b. Lime 

c. Oxalic acid solution 

d. Petrol 


Answer- Oxalic acid solution


Que- Which is not an anasthetic agent in surgical operations? 

a. Chloroform 

b. Ether 

c. Nitrous oxide 

d. Acetone 


Answer- Acetone


Que- 'Acid rain' is caused due to air pollution by 

a. Carbon dioxide 

b. Carbon monoxide 

c. Methane 

d. Nitrous oxide and sulphur dioxide 


Answer- Nitrous oxide and sulphur dioxide


Que- Gas released during Bhopal tragedy was : 

a. Sodium isothiocyanate 

b. Potassium isothiocyanate 

c. Ethyl isocyanate 

d. Methyl isocyanate 


Answer- Methyl isocyanate


Que- The filter over which sewage is sprinkled is called as 

a. Trickling filter 

b. Percolating filter 

c. Contact bed 

d. Intermittent sand filter 


Answer- Trickling filter


Que- Main source of lead pollution is from 

a. Sewage 

b. Leaded gasoline 

c. Tobacco 

d. Insecticides 


Answer- Leaded gasoline


Que- An example of major air pollutant is 

a. Oxygen 

b. Carbon monoxide 

c. Helium 

d. Carbon dioxide 


Answer- Carbon monoxide


Que- The nuclear particles which are assumed to hold the nucleons together are 

a. electrons 

b. positrons 

c. neutrons 

d. mesons 


Answer- mesons


Que- The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is 

a. 2.05 gram 

b. 3.05 gram 

c. 4.05 gram 

d. 5.05 gram 


Answer- 3.05 gram


Que- The octane number of zero is assigned to 

a. 2-methyl octane 

b. n-heptane 

c. iso-octane 

d. 3-methyl octane 


Answer- n-heptane


Que- The metal that is used as a catalyst in the hydrogenation of oils is 

a. Ni 

b. Pb 

c. Cu 

d. Pt 


Answer- Ni


Que- The most abundant rare gas in the atmosphere is 

a. He 

b. Ne 

c. Ar 

d. Xe 


Answer- Ar


Que- Maximum permissible concentration of copper in drinking water in mg/L is 

a. 0.01 

b. 0.05 

c. 1.0 

d. 2.0 


Answer- 1.0


Que- The amount of chlorine available in water after disinfection is called as 

a. Free chlorine 

b. Residual chlorine 

c. Free available chlorine 

d. Combined available chlorine 


Answer- Residual chlorine


Que- Maximum permissible concentration of total hardness in drinking water is 

a. 50 

b. 100 

c. 200 

d. 500 


Answer- 200


Que- Which one of the following is extensively used for sterilizing water ? 

a. Bleaching powder 

b. Alum 

c. Borax powder 

d. Soda powder 


Answer- Bleaching powder


Que- Assertion (A) : Synthetic detergents can lather when in hard water.  Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water. 

a. Both A and R is true and R is the correct explanation of A 

b. Both A and R is true but R is not a correct explanation of A 

c. A is true but R is false 

d. A is false but R is true 


Answer- Both A and R is true and R is the correct explanation of A


Que- Which one is the most reactive halogen? 

a. Iodine 

b. Bromine 

c. Fluorine 

d. Chlorine 


Answer- Fluorine


Que- Who first published the periodic table? 

a. John Dalton 

b. Julius Lothar Meyer 

c. Henry Moseley 

d. Dmitri Mendeleev 


Answer- Dmitri Mendeleev


Que- The most suitable vessel for storing concentrated sulphuric acid is 

a. Copper vessel 

b. Aluminium vessel 

c. Glass vessel 

d. Earthen vessel 


Answer- Glass vessel


Que- Which one of the following nonmetals shows allotropy in the liquid state? 

a. Carbon 

b. Sulphur 

c. Phosphorous 

d. Bromine 


Answer- Sulphur


Que- Sulphuric acid is 

a. Monobasic 

b. Dibasic 

c. Tribasic 

d. Tetrabasic 


Answer- Dibasic


Que- The buffer action of blood is due to the presence of 

a. HCI and NaCI 

b. CI– and [CO3]2– 

c. CI– and [HCO3]– 

d. [HCO3]– and H2CO3 


Answer- [HCO3]– and H2CO3


Que- Bakelite is a co-polymer of Phenol and 

a. Formaldehyde 

b. Acetaldehyde 

c. Benzaldehyde 

d. Cinnaldehyde 


Answer- Formaldehyde


Que- Which of the following is not an addition polymer? 

a. Nylon 

b. PVC 

c. Polythene 

d. Polystyrene 


Answer- Nylon


Que- The polymer used in making plastic crockery is 

a. Decron 

b. Nylon 

c. Bakelite 

d. Melamine 


Answer- Melamine

Previous Post Next Post