Q. 104.3( 8 Votes )
On adding dilute HCl to CuO powder, the solution formed is blue green. Predict the new compound formed which imparts a blue-green colour to the solution.
When HCl is diluted with copper oxide, the following reaction takes place:
HCl + CuO → CuCl2 + H2O
The new compound formed is copper chloride (CuCl2) which imparts a blue-green colour to the solution. The above reaction is a type of double displacement reaction.
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Which among the following statement(s) is(are) true? Exposure of silver chloride to sunlight for a long duration turns grey due to:
(i) The formation of silver by decomposition of silver chloride
(ii) Sublimation of silver chloride
(iii) Decomposition of chlorine gas from silver chloride
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(i) Reaction of water with quicklime
(ii) Dilution of an acid
(iii) Evaporation of water
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