Top 1000+ Solved Chemistry MCQ Questions Answer
Q. Heavy metals got their name because compared to other atoms they have -
a. Higher densities
b. Higher atomic masses
c. Higher atomic numbers
d. Higher atomic radii
Q. Concentration of a material which is lethal to 50% animal is called–
a. LD50
b. LC50
c. NOAEL
d. ADI
Q. Muddy water is treated with alum in purification process, it is termed as :
a. emulsification
b. absorption
c. adsorption
d. coagulation
Q. ‘Plaster of paris’ chemically known as
a. Sodium Aluminate
b. Calcium sulphate
c. Spdium bicarbonate
d. Sodium acetate
Q. The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called –
a. Zinc plating
b. Alloy formation
c. Vulcanization
d. Galvanization
Q. Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth?
a. Carbon dioxide
b. Oxygen
c. Carbon monoxide
d. Nitrogen
Q. Philosopher’s wool is chemically -
a. Aluminium oxide
b. Magnesium oxide
c. Zinc oxide
d. Calcium oxide
Q. The chemical used for cloud seeding for artificial rains is -
a. Silver Nitrate
b. Potassium Bromide
c. Silver Iodide
d. Potassium Nitrate