Write the balanced equation involved in the preparation of
(a) bleaching powder from slaked lime
(b) nitric oxide from nitric acid
( c) chlorine from sodium chloride.

Explanation

(a) `Ca(OH)_2 + Cl_2 rarr CaOCl_2 + H_2 O`
(b) `3Cu + (dil.) 8 HNO_3 rarr 3 Cu(NO_3)_2 + 2 NO + 4 H_2 O [Cu rarr Cu^(2+) , No_3 ^(Ө) rarr NO]`
( c) `2 NaCl + 2 H_2 SO_4 + MnO_2 rarr Na_2 SO_4 + MnSO_4 Cl_2 uarr + 2 H_2 O`.