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प्रश्न
Identify the following substance:
Gas C has an offensive smell like rotten eggs.
उत्तर
Hydrogen sulphide
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संबंधित प्रश्न
Write a balanced equation for the preparation of the following salts:
Copper sulphate from Copper Carbonate.
Why is sodium chloride required in our body?
Name three chemicals made from common salt (or sodium chloride).
Name the salt which is used as preservative in pickles, and in curing meat and fish.
Write the name and formula of one salt each which contains:
two molecules of water of crystallisation
The pH values of three solutions A, B and C are given in the table. Answer the folloiwng questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
Which solution will have no effect on litmus solution?
State what would you observe when :
The salt ferric chloride is exposed to the atmosphere.
Distinguish by a chemical test, Sodium carbonate and sodium sulphite.
How is normal salt obtained? Give a suitable reaction.
You are provided with the list of chemicals mentioned below in the box:
| Sodium hydroxide solution, copper carbonate, zinc, hydrochloric acid, copper, dilute sulphuric acid, chlorine, iron |
Using suitable chemicals from the list given, write a balanced chemical equation for the preparation of the salt mentioned below:
Copper sulphate
