Top 1000+ Solved Chemistry MCQ Questions Answer
Q. Which gas is used as fire extinguisher?
a. Carbon dioxide
b. Carbon monoxide
c. Carbon suboxide
d. Sulphur dioxide
Q. Which one of the following is not a radioactive element?
a. Uranium
b. Thorium
c. Radium
d. Cadmium
Q. Aspirin is common name of –
a. Salicylic Acid
b. Salicylate
c. Methyl Salicylate
d. Acetyl Salicylic Acid
Q. Carbon monoxide is an inflammable gas. Which one of the following is also inflammable?
a. Helium
b. Nitrogen
c. Oxygen
d. Hydrogen
Q. The constituents of automobile exhaust that can cause cancer is/are :
a. Oxides of nitrogen
b. Carbon monoxide
c. Polycyclic hydrocarbons
d. Lead
Q. Hard steel contains –
a. 2 to 5 per cent carbon
b. 0.5 to 1.5 per cent carbon
c. 0.1 to 0.4 per cent carbon
d. 0.01 to 0.04 per cent carbon
Q. The metals commonly used for electroplating are –
a. Gold, Sodium and Chromium
b. Chromium, Copper and Nickel
c. Nickel, Lead and Chromium
d. Gold, Sodium and Potassium
Q. Which of the following in auto-mobile exhaust can cause cancer?
a. Oxides of nitrogen
b. Carbon monoxide
c. Lead
d. Polyclinic hydrocarbons
Q. Which one of the following gases has the highest calorific value?
a. Natural gas
b. Water gas
c. Coal gas
d. Indane gas
Q. Which type of radiations are absorbed by the upper layer of the atmosphere?
a. Radio-waves
b. Infrared
c. Visible
d. Ultraviolet
Q. The gas which is mainly responsible for the green house effect is:
a. Ozone
b. Oxygen
c. Carbon dioxide
d. Carbon monoxide
Q. Which one of the following is used for dating very old objects of archaeological importance?
a. Phosphorus-31
b. Tritium
c. Radium
d. Carbon-14
Q. Which one out of the following helps in burning?
a. carbon dioxide
b. oxygen
c. carbon monoxide
d. nitrogen