Which one of the following mixed sulphates is not an alum ? Options: A . &nbsp K 2 S O 4 . A l 2 ( S O 4 ) 3 .24 H 2 O B . &nbsp K 2 S O 4 . C r 2 ( S O 4 ) 3 .24 H 2 O C . &nbsp N a 2 S O 4 . F e 2 ( S O 4 ) 3 .24 H 2 O D . &nbsp C u S O 4 . A l 2 ( S O 4 ) 3 .24 H 2 O

Which one of the following mixed sulphates is not an alum ?

Question -

Which one of the following mixed sulphates is not an alum ?

Options:

A .

K_{2} S O_{4} . A l_{2} (S O_{4})_{3} .24 H_{2} O

B .

K_{2} S O_{4} . C r_{2} (S O_{4})_{3} .24 H_{2} O

C .

N a_{2} S O_{4} . F e_{2} (S O_{4})_{3} .24 H_{2} O

D .

C u S O_{4} . A l_{2} (S O_{4})_{3} .24 H_{2} O

Answer: Option D
:
D

Alums contain monovalent $M^{+}$ and trivalent $M^{+ 3}$ ions $C u S O_{4} . A l_{2} (S O_{4})_{3} .24 H_{2} O$ has $C u^{+ 2}$ and $A l^{+ 3}$ ions

Was this answer helpful ?

Next Question