Top 1000+ Solved Chemistry MCQ Questions Answer
Q. Which of the following metal has the lowest melting point?
a. Lead
b. Lithium
c. Potassium
d. Sodium
Q. The main component of liquid bleach is:
a. Sodium chloride
b. Sodium hypochlorite
c. Hydrochloric acid
d. Sodium hypochlorate
Q. The chemical used as a fixer in photography is -
a. sodium thiosulphate
b. sodium sulphate
c. borax
d. ammonium sulphate
Q. Which of the following is the most abundant metal on Earth's crust?
a. Magnesium
b. Iron
c. Copper
d. Aluminium
Q. Which compound is formed when a Magnesium ribbon is burnt in air?
a. Magnesium Nitrate
b. Magnesium Carbonate
c. Magnesium Oxide
d. Magnesium Nitride
Q. Interveinal necrotic spots on leaves appear due to –
a. HF injuly
b. SO2 injury
c. NO2 injury
d. O3 injury
Q. Which one of the following is not a 'green house gas'?
a. Chlorofluorocarbons
b. Methane
c. Carbon dioxide
d. Nitrogen
Q. Carbon dioxide is –
a. a reducing agent
b. an oxidising agent
c. a dehydrating agent
d. a bleaching agent
Q. Black lung disease occurs in people working in –
a. Electroplating industry
b. Organic solvents industry
c. Paint manufacturing industry
d. Coal mines