Solutions Question 2
Question: Which of the following salt has the same value of Van’t Hoff factor $ i $ as that of $ K_3[Fe{{(CN)}_6}] $ [CBSE PMT 1994; AIIMS 1998]
Options:
A) $ Al_2{{(SO_4)}_3} $
B) $ NaCl $
C) $ Na_2SO_4 $
D) $ Al{{(NO_3)}_3} $
Show Answer
Answer:
Correct Answer: A
Solution:
$ K_4[Fe{{(CN)}_6}] $ dissociates as $ 4{K^{+}}+{{[Fe{{(CN)}_6}]}^{4-}}, $ thus 1 molecule dissociates into five particles in the similar way $ Al_2{{(SO_4)}_3} $ also gives five particles per molecule.
