Question

Which of the following are the example of double salt?
A $FeSO _4 \left( NH _4\right)_2 SO _4 \cdot 6 H _2 O$
B $CuSO _4 4 NH _3 H _2 O$
C $K _2 SO _4 \cdot Al _2\left( SO _4\right)_3 \cdot 24 H _2 O$
D $Fe ( CN )_2 \cdot 4 KCN$
Choose the correct answer

• A. A and B only
• B. A, B and D only
• C. A and C only
• D. B and D only

Answer 1

Answer: (C)

A and C only

Answer 2

Double salt contain's two or more types of salts. CuSO4​⋅4NH3​⋅H2​O and Fe(CN)2​.4KCN are complex compounds.