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प्रश्न
Name a colourless gas which bleaches.
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उत्तर
Sulphur dioxide gas (SO2)
संबंधित प्रश्न
Name the raw material used for the production of caustic soda.
Explain how anhydrous copper sulphate can be used to detect the presence of moisture (water) in a liquid
What is meant by 'hydrated' and 'anhydrous' salts? Explain with examples.
name two salts which are basic.
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 liberate CO2 when reacted with sodium carbonate?
Define the following term:
Water of crystallization
Distinguish by a chemical test sodium chloride and sodium sulphide.
Salts A, B, C, D and E undergo reactions (i) to (v) respectively. Identify the anion present in these salts on the basis of these reactions.
- When silver nitrate solution is added to a solution of A, a white precipitate, insoluble in dilute nitric acid, is formed.
- The addition of dilute hydrochloric acid to B produces a gas which turns lead acetate black on paper.
- When a freshly prepared solution of ferrous sulphate is added to a solution of C and concentrated sulphuric acid is gently poured from the side of the test tube, a brown ring is formed.
- When dilute sulphuric acid is added to D, a gas is produced which turns acidified potassium dichromate solution from orange to green.
- The addition of dilute hydrochloric acid to E produces effervescence. The gas produced turns lime water milky but does not affect acidified potassium dichromate solution.
Sodium carbonate is a basic salt because it is a salt of a ____________.
The chemical name of plaster of Paris is ______.
