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(a) Write two poisonous gases prepared from chlorine gas.

(b) Why does $Cu^{2+}$ solution give blue colour on reaction with ammonia ?

Answers (1)

$Phosphene\left [ COCl)_2 \right ],\: \: Tear\: gas[CCl_3NO_2]$

$CuSO_4(aq)+NH_4OH(aq)\rightarrow \left [ Cu(NH_3)_4 \right ]SO_4(aq)+4H_2O.$

(blue)

OR

$Cu^{2+}(aq)+4NH_3(aq)\rightarrow \left [ Cu(NH_3)_4 \right ]^{2+}(aq)$

(blue)

Posted by

Sumit Saini

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