Consider the following statements:

1. Anhydrous sodium carbonate is commonly known as baking soda.

2. Baking soda is used in fire extinguishers.

3. Bleaching powder is manufactured in the Hasenclever plant.

Which of the statements given above is/are correct?

Consider the following statements:

$1$. Marble is a constituent of toothpaste.

$2$. Gypsum is used for the manufacture of ammonium sulfate.

Which of the statements given above is/are correct?

Consider the following statements:

1. Glycerol is used in explosives.

2. Detergents are made from hydrocarbons obtained from coal or petroleum.

3. Sodium per borate is a mild bleaching agent.

4. Methanol is used for making synthetic fibres.

Which of the statements given above are correct?