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प्रश्न
State one appropriate observation of the following:
Copper sulphate is treated with dilute hydrochloric acid.
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उत्तर
A colourless gas having the smell of rotten eggs is given off. The gas evolved is H2S:
\[\ce{CuS + 2HCl -> CuCl2 + H2S}\]
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संबंधित प्रश्न
How will you prepare hydrochloric acid in laboratory? OR
Describe briefly the method employed to dissolve hydrogen chloride gas in water as it is prepared. What is the purpose of funnel while preparing hydrochloric acid from HCI gas?
Explain, why (or give reasons for)
Only a very dilute solution of hydrogen chloride in water can be concentrated by boiling the solution while a very concentrated solution would become less concentrated when boiled.
Explain, why (or give reasons for)
An aqeous solution of chlorine is acidic is nature.
Give two tests for hydrochloric acid.
How can you prove that hydrochloric acid contain :
Hydrogen
Fill in the blank:
A constant boiling mixture of water and hydrochloric acid is also called as _______________.
Fill in the blank:
The white precipitate of lead chloride is soluble in _________
What wilI you observed when concentrated HCI is added to lead (IV) oxide and warmed ?
State one appropriate observation of the following:
Which gas is evolved when potassium sulphite with dilute hydrochloric acid.
State your observation when dilute hydrochloric acid is added to sodium thiosulphate.
