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1. Vinu dissolves \(50 g\) of sugar in \(250 ml\) of hot water, Sarath dissolves \(50 g\) of same sugar in \(250 ml\) of cold water. Who will get faster dissolution of sugar? and Why?
The solubility of a in a liquid increases as rises.
Sugar will dissolve in Vinu, because Vinu dissolves \(50 g\) of sugar in \(250 ml\) of hot water and Sarath dissolves \(50 g\) of sugar in \(250 ml\) of cold water.
2. 'A' is a blue coloured crystaline salt. On heating it loses blue colour and to give 'B'. When water is added, 'B' gives back to 'A'. Identify A and B, write the equation.
is the blue-colored crystalline salt (A).
Copper sulphate pentahydrate loses its blue colour when heated, yielding anhydrous (B).
When is added to anhydrous (B), is formed (A).
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