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प्रश्न
Identify the following substance:
Gas C has an offensive smell like rotten eggs.
Identify the following substance:
The Gas having an offensive smell like rotten eggs.
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उत्तर
Hydrogen sulphide (H2S)
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संबंधित प्रश्न
What name is given to the common salt which is mined from underground deposits? How was this salt formed?
Name the raw material used for the production of caustic soda.
Explain why chlorine is used for sterilising drinking water supply.
What is meant by ‘hydrated’ salts? Explain with examples.
The number of molecules of water of crystallisation present in washing soda crystals is ______.
The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is:
Give one example of a salt which gives an aqueous solution having:
pH more than 7
State one observation for each of the following :
Lead nitric is heated strongly in a test tube.
The pH values of three solutions A, B and C are given in the table. Answer the following questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
- Which solution will have no effect on litmus solution?
- Which solution will liberate CO2 when reacted with sodium carbonate?
- Which solution will turn red litmus solution blue?
Copy and complete the following table which refers to the action of heat on some carbonates:
| Carbonate | Colour of residue on cooling |
| Zinc Carbonate | |
| Lead carbonate | |
| Copper carbonate |
