[1989]
(a) Bleaching powder
(b) $K_4[Fe(CN)_6]$
(c) Нуро
(d) Potash alum
Correct Answer: 29.(d)
Solution:
(d) Potash alum $K_2 SO_4 \cdot Al_2(SO_4)_3 \cdot 24 H_2 O$ is a double salt.
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