Bleaching Action of Chlorine

Q. Why is $HCl$ gas passed through $H_{2}S{O}_4$ during the laboratory preparation of hydrochloric acid?

1. $H_{2}S{O}_4$ acts as a dehydrating agent
   
2. $H_{2}S{O}_4$ coverts hydrogen chloride to hydrochloric acid
3. $H_{2}S{O}_4$ helps to speed up the reaction
4. $H_{2}S{O}_4$ coverts hydrochloric acid to hydrogen chloride gas

Q.

Bleaching powder is prepared by passing chlorine gas over dry slaked lime.

1. True

2. False

Q.

Why is carboxylic acid weaker than $\mathrm{HCl}$?

Q.

In the textile industries, which of the following is used to bleach cotton fabrics?

1. Chlorine

2. Hydrogen

3. Nitrogen

4. Ozone

Q.

What are tri acidic bases? Give one example?

Q. Which of the following can decolorise a coloured substance by bleaching?

1. Carbon dioxide
2. Hydrogen gas
3. Oxygen
4. Chlorine gas

Q. Question 15
Give two important uses of washing soda and baking soda.

Q. What type of liquid is hydrogen peroxide?

Q.

Among the following options, which is the strongest acid?

1. H₃PO₄

2. H₂SO₄

3. CH₃COOH

4. HNO₃

Q. Nascent oxygen is a powerful ______ agent which is responsible for the bleaching property of ______.

1. reducing, chlorine
2. oxidising, sulphur
3. reducing, sulphur
4. oxidising, chlorine

Q.

When chlorine reacts with water what are the final products?

1. Hydrochloric acid

2. Hypochlorous acid

3. Nascent oxygen

4. Chlorine gas

Q.

Which among the given options is used to bleach cotton fabrics?

1. Methanol

2. Carbon dioxide

3. Carbon monoxide

4. Chlorine

Q.

Which among the given options help in the production of bleaching powder?

1. Dry slaked lime

2. Caustic soda

3. Caustic potash

4. Soda water

Q.

Which ions formed from hypochlorous acid form the basis for the bleaching action of chlorine?

1. $Cl{O}^{-}$
2. $Cl{O}^{+}$
3. $H^{+}$
4. $O^{-}$

Q. What happens when moist news paper is introduced in to a jar of chlorine

Q. Chlorine is used for ___.

1. breathing

2. bleaching

3. fertilising

4. preserving food

Q. Which of these following elements is used to kill germs in water to make it safer?

1. Oxygen

2. Chlorine

3. Nitrogen

4. Hydrogen

Q. How does washing soda changes to washing powder?