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प्रश्न
Name a colourless gas which bleaches.
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उत्तर
Sulphur dioxide gas (SO2)
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संबंधित प्रश्न
The property by which certain hydrated salts, when left exposed to the atmosphere, lose their water of crystallization and crumble into powder.
What are the two main ways in which common salt (sodium chloride) occurs in nature?
Complete and balance the following chemical equations:
`NaCl + NH_3 + H_2O +CO_2`→
What is meant by 'a family of salts'? Explain with examples.
A salt X when dissolved in distilled water gives a clear solution which turns red litmus blue. Explain the phenomenon.
Name a salt whose solubility decreases with temperature.
You are asked to prepare hard water in your laboratory. Select a group from the following groups of salts, any salt of which you may dissolve in distilled water to obtain hard water.
(A) NaCl; Na2SO4; KCl
(B) NaCl; CaCl2; KCl
(C) CaCl2; CaSO4; MgSO4
(D) Na2SO4; CaSO4; MgSO4
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?
Taking sodium carbonate as an example, give the meaning of the following terms:
Anhydrous
State what would you observe when :
Washing soda crystals are exposed to the atmosphere.
