Question Booklets

Quiz Category: Chemistry

Q. Hydrogen bomb is based on the principle of

A. controlled fusion reaction

B. uncontrolled fusion reaction

C. controlled fission reaction

D. uncontrolled fission reaction

Correct option is B

Q. H2O is liquid and H2S is a gas because

A. oxygen forms stronger hydrogen level than sulphur.

B. oxygen is less electronegative than sulphur.

C. atomic radius of oxygen is less than that of sulphur.

D. atomic radius of oxygen is greater than that of sulphur.

Correct option is A

Q. Consider the following statements and select the correct code. Assertion (A): A chemical reaction becomes faster at higher temperature. Reason (R): At higher temperature, molecular motion becomes more rapid.

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

B. Both A and R are true, but R is not correct explanation of A.

C. A is true, but R is false.

D. A is false, but R is true.

Correct option is A

Q. The order of appearance of the following with increasing temperature during the refining of crude oil is

A. Kerosene, gasoline, diesel

B. Diesel, gasoline, kerosene

C. Gasoline, kerosene, diesel

D. Gasoline, diesel, kerosene

Correct option is C

Q. The blue colour of water in the sea. What is the reason behind the phenomenon?

A. Refraction of the blue light by the impurities in sea water.

B. Scattering of blue light by water molecules.

C. Refraction of blue sky by sea water.

D. Absorption of other colours except the blue colour by water molecules.

Correct option is B

Q. Helium is preferred to hydrogen in air balloons because it

A. is cheaper

B. is less dense

C. has greater lifting power

D. does not form an explosive mixture with air

Correct option is D

Q. Which one of the following pairs is correctly matched?

A. Silver iodide — Horn silver

B. Silver chloride — Artificial rain

C. Zinc phosphide — Rat poison

D. Zinc sulphide — Philosopher’s wool

Correct option is C

Q. While tinning of brass utensils, the ammonium chloride powder used to clean the hot utensil produces fumes of

A. ammonia

B. carbon monoxide

C. hydrochloric acid

D. ammonia and hydrochloric acid

Correct option is D

Q. Hydrofluoric acid is not kept in glass bottles because it reacts with

A. visible light

B. sodium oxide of glass

C. aluminium oxide of glass

D. silicon dioxide of glass

Correct option is D

Q. The inexhaustible source of energy of the stars is due to

A. conversion of hydrogen to helium

B. conversion of helium to hydrogen

C. decay of radioactive elements

D. excess of oxygen that helps burning and release of energy

Correct option is A