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प्रश्न
Distinguish by a chemical test sodium chloride and sodium sulphide.
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उत्तर
When diluted sulphuric acid is added to sodium sulphide and heated, hydrogen sulphide gas is produced, which smells like rotten eggs and turns lead acetate paper black.
\[\ce{Na2S + H2SO4 -> H2S ^ + Na2SO4}\]
When concentrated sulphuric acid is exposed to sodium chloride and heated, HCl gas is produced, resulting in dense white vapours when a glass rod dipped in ammonia is brought near it.
\[\ce{NaCl + H2SO4 -> HCl ^ + NaHSO4}\]
संबंधित प्रश्न
The property by which certain hydrated salts, when left exposed to the atmosphere, lose their water of crystallization and crumble into powder.
Name three products of the chlor-alkali process. State two uses of each of these products.
Give the names and formulae of any two salts. Also name the acids and bases from which these salt may be obtained.
The products of chlor-alkali process are:
(a) NaCl, Cl2 and H2
(b) H2, Cl2 and NaOH
(c) Cl2, Na2CO3 and H2O
(d) NaOH, Cl2 and HCl
Consider the following salts:
Na2CO3, NaCl, NH4Cl, CH3COONa, K2SO4, (NH4)2SO4
Which of these salts will give:
basic solutions (or alkaline solutions)?
name two salts which are neutral, when dissolved in water.
Answer the questions below relating your answers only to salts in the following list: Sodium chloride, anhydrous calcium chloride, copper sulphate-5-water?
- What name is given to the water in the compound copper sulphate-5-water?
- If copper sulphate-5-water is heated, anhydrous coppersulphate is formed. What is its colour?
- By what means, other than healing, could you dehydrate copper sulphate-5-water and obtain anhydrous coppersulphate?
- Which one of the salts in the given list is deliquescent?
Differentiate hydrate and anhydrous salts with examples.
Write any five uses of salts.
Many salts absorb water from the atmosphere. This property is called:
