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

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

 

 

 

 
 
 
 
 

Answers (1)
S Sumit

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)

                                                         

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