Top 1000+ Solved Chemistry MCQ Questions Answer
Q. In vulcanisation process, rubber can be hardened by adding -
a. Nitrogen
b. Silicon
c. Sulphur
d. Alcohol
Q. Urea is a -
a. Sodium fertilizer
b. Phosphatic fertilizer
c. Nitrogenous fertilizer
d. Potassium fertilizer
Q. During inter conversion of energy from one form to other forms, total energy at any time remains–
a. constant
b. zero
c. increasing
d. decreasing
Q. Which of the following is a physical change?
a. oxidation
b. reduction
c. sublimation
d. decomposition
Q. Which gas is used to manufacture vanaspati from vegetable oil is -
a. carbon dioxide
b. nitrogen
c. oxygen
d. hydrogen
Q. The nucleus of an atom consists of -
a. electrons and neutrons
b. electrons and protons
c. protons and neutrons
d. All of the above
Q. 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
Q. Ethanol containing 5% water is known as –
a. rectified spirit
b. denatured spirit
c. methylated alcohol
d. power alcohol
Q. The major harmful gas emitted by automobile vehicles which causes air pollution is –
a. Carbon Monoxide
b. Methane
c. Carbon dioxide
d. Ozone gas