Top 1000+ Solved Chemistry MCQ Questions Answer
Q. The process by which milk is converted to curd is called –
a. Pasteurization
b. Vernalization
c. Fermentation
d. Retting
Q. The technique of calculating the age of fossil organisms is -
a. Radiocarbon dating
b. Electroporation
c. Counting the annual rings
d. Micromanipulation
Q. Of the following which one pollutes the air of a big city?
a. Copper
b. Chromium
c. Lead
d. Calcium
Q. Hydrofluoric acid is not kept in glass bottles because it reacts with -
a. visible light
b. silicon dioxide of glass
c. aluminium oxide of glass
d. sodium oxide of glass
Q. Which gas is used in fire extinguishers?
a. Carbon dioxide
b. Nitrogen oxide
c. Carbon monoxide
d. Sulpher dioxide
Q. Combustion of a candle is a/an -
a. photochemical reaction
b. physical change
c. endothermic reaction
d. exothermic reaction
Q. Another name for baking soda is :
a. Sodium bicarbonate
b. Sodium carbonate
c. Sodium sulphate
d. Sodium hydroxide
Q. Brass is an alloy of -
a. Nickel and Copper
b. Copper and Silver
c. Nickel and Zinc
d. Zinc and Copper
Q. "Bhopal gas tragedy" 1984 is related to–
a. Aluminium Phosphide
b. Methyl bromide
c. Methyl isocyanate
d. Carbon dioxide
Q. Surface water is a better source of drinking water because it is poor in -
a. Dust
b. Bacteria
c. Arsenic
d. Algae