Top 1000+ Solved Chemistry MCQ Questions Answer
Q. Acid rain is caused due to pollution of atmosphere by –
a. oxides of carbon and nitrogen
b. oxides of nitrogen and sulphur
c. oxides of nitrogen and phosphorous
d. None of these
Q. Neuron is -
a. Fundamental unit of energy
b. Particle released in radioactive emission
c. Antiparbcle of neutron
d. Fundamental unit of nervous system
Q. Water cycle refers to –
a. an integrated attempt to recycle water in relatively arid regions
b. constant movement of water from ocean to land and back to ocean once again
c. scientific management of water in areas excessively plagued with water-logging
d. water distribution in relatively dry area
Q. 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
Q. Which of the following is not a method of preparing oxygen?
a. Electrolysis of water
b. Fractional distillation of liquid air
c. Decomposition of potassium permanganate
d. Decomposition of manganese dioxide
Q. Which one of the following takes place during a nuclear fusion?
a. a heavy nucleus bombarded by neutrons breaks up
b. a heavy nucleus breaks up spontaneously
c. two light nuclei combine to form a heavy nucleus
d. a light nucleus breaks up spontaneously
Q. Helium is added to the oxygen supply of deep sea divers because it is -
a. less poisonous than nitrogen
b. (2) Lighter than nitrogen
c. Readily miscible with oxygen
d. less soluble in blood than nitrogen at high pressure
Q. The chemical bahaviour of an atom depends upon -
a. the number of protons in its nucleus
b. the number of neutrons in the nucleus
c. the number of electrons orbiting around the nucleus
d. the number of nucleons in the nucleus
Q. Methyl phenyl ether can be obtained by reacting -
a. phenolate ions and methyl iodide
b. methoxide ions and bromobenzene
c. methanol and phenol
d. bromobenzene and methyl bromide
Q. Acid Rain is caused due to pollution of atmosphere by –
a. Oxides of nitrogen and phosphorus
b. Oxides of carbon and nitrogen
c. Oxides of nitrogen and sulphur
d. None of these
Q. The Bhopal gas tragedy was caused by the gas -
a. Methyl chloride
b. Methyl Iso Cyanide
c. Methyl Iso Cyanate
d. Methyl Cyanide
Q. The wine is prepared by the process of
a. fermentation
b. catalysation
c. conjugation
d. displacement
Q. Fission and fusion are called -
a. molecular reactions
b. potential reactions
c. nuclear reactions
d. heat reactions
Q. Acids on reacting with metal carbonates release which of the following gases?
a. Hydrogen sulphide
b. Carbon Dioxide
c. Propane
d. Hydrogen
Q. Which of the following is released during photosynthesis?
a. Oxygen
b. Carbon dioxide
c. Energy
d. Light