The value of van't Hoff factors for $K C l, N a C l$ and $K_{2} {S O}_{4}$ , respectively, are :

2, 2 and 2

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2, 2, and 3

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1, 1 and 2

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1, 1 and 1

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Solution

The correct option is B 2, 2, and 3
$i$
i) For $K C l$ $2$
$K C l ⟶ K^{+} + {C l}^{-}     $ {since $i = n$ for strong electrolytes}
ii) $N a C l$
$N a C l ⟶ {N a}^{+} + {C l}^{-}     $
$n = 2$
iii) $K_{2} {S O}_{4}$
$K_{2} {S O}_{4} ⟶ {2 K}^{+} + {S O}_{4}^{2 -}     $
$n = 3$
$i = 3$

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The value of van't Hoff factors for KCl,NaCl and K2SO4, respectively, are :

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