Ncert Exercises & Solutions

Identify A to E and also explain the reaction involved.

The substances from A to E are

A = C u; B = C u {(N O_{3})}_{2}; C = {[C u {(N H_{3})}_{4}]}^{2 +}; D = C O_{2}; E = C a C O_{3}

Reactions:

$(i) C u C O_{3} \overset{∆}{\to} C u O + C O_{2}] \times 2$
$(i i) 2 C u O + C u S \to \underset{[A]}{3 C u} + S O_{2}$
$(i i i) \underset{[A]}{C u} + 4 H N O_{3} (c o n c .) \to C u \underset{[B]}{{(N O_{3})}_{2}} + 2 N O + 2 H_{2} O$
$(i v) \underset{[B]}{C u^{2 +}} + N H_{3} \to \underset{(B l u e s o l u t i o n)}{\underset{[C]}{[C u {(N O_{3})}_{4}]}}$
$(v) C a {(O H)}_{2} + \underset{[D]}{C O_{2}} \to \underset{[E]}{C a C O_{3}} + H_{2} O$
$(v i) C a C O_{3} + H_{2} O + C O_{2} \to C a {(H C O_{3})}_{2}$

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