Question

1. Name two organic acids and two inorganic acids.
2. What are indicators? Write the colour change of blue and red litmus paper in acidic and basic
medium.
3. Write a short note on acid rain.
4. Why acids are not stored in metal containers?
5. What is the pH value of water? What colour does it shows in the pH Scale?

Answer 1

Answer:

1. inorganic = hydrochloric acid (HCL).nitric acid (HNO3).
2. organic acid =benzene(C6H6),carboxylic acid
3. indicators are substance whose colour changes  due to change in ph.
4. acid rain is a boared term that includes any form of precipitaion with acid components such as sulphurisc or nitric acid.
5. 7.blue.

Explanation

Answer 2

CHEMISTRY

1.Answer

Organic acid

1. citric acid
2. tatric acid
3. malic acid

Inorganic acid

1. Hydrochloric acid
2. sulphuric acid
3. Nitric acid

2.Answer

indicator is a medium where we use to classify compound is in either acid,base and salt

Red to blue -->Base

Blue to red--->Acid

3.Answer

An acid rain is caused by the increase of gas in exccesive amount that cause acid rain

Some gases

sulphur dioxide

Nitric acid

This cause many problem like harmful the monument and aquatic life.

4.Answer

Acid are not stored in metal because acid easily react with metal and form hydrogen gas,salt.

So,it is harmful to put acid in a metal container

5Answer

The pH value of water is 7

and colour become green