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

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