100+ Physical Chemistry MCQ Questions with Answers - 2

Question: 6

Give importance uses of plaster of paris?

Used to make black board chalks, toys etc.

Used to make smooth surfaces and ornate designs on walls and false ceilings.

Used to make casts for statues.

Used for setting fractured bones and in density.

Question: 7

What is soda ash?

Anhydrous sodium carbonate is otherwise called as soda ash. It is prepared by heating washing soda.

Question: 8

Why is sodium bicarbonate used in baking powder?

When sodium bicarbonate is heated, it decomposes with the evolution of carbon dioxide. This CO₂ gas softens the dough. Hence it is used as a constituent of baking powder.

Question: 9

What is stainless?

Steel containing 8% nickel and 18% Chromium is called stainless steel.

It is used for making utensils, surgical instruments automobile parts etc.

Question: 10

What is RCC?

RCC means Reinforced Cement Concrete. It is used in the construction of dams, bridges, roofs and pillars.