Question

2. When you buy washing soda from the market, you will get it in powd
form because
a. the crystals of washing soda quickly lose water molecules
b. the shop keeper prefers to powder the crystals.
c. washing soda does not form crystals.
d. washing soda is a drying agent.
3. A sample of hard water is heated in a utensil. A white deposi
calcium carbonate is formed. This is due to the presence of
a. calcium chloride
b. magnesium sulphate
c. calcium bicarbonate d. calcium hydroxide
4. The salt that causes hardness in water and also liberates ca
dioxide on heating is,
a. magnesium bicarbonate b. calcium chloride
c. magnesium sulphate d. calcium sulphate.​

Answer 1

Answer:

2. a. the crystals of washing soda quickly lose water molecules.

3.a.calcium chloride.

4.a.magnesium bicarbonate.