ICSE Class 10 Chemistry 2023 Solved Paper

Study the following observations and name the anions present in each of the reactions.

Question : 58

Total: 88

When a crystalline solid ' P ' is warmed with concentrated H2SO4 and copper turnings a reddish brown gas is released.

Solution:

' P ' is copper nitrate, when it warmed with conc. H2SO4 and copper turnings, a reddish brown gas nitrogen dioxide is released.

Cu(NO3)2

(P)

+H2SO4+Cu→2CuSO4 ‌+2NO2+2H2O
Anion is NO3− (Nitrate)

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