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NEET 2026

Exam: NEET
Year: 2026
Subject: Chemistry
Chapter: p Block Elements (Group 13 & 14)

NEET 2026 · Chemistry · p Block Elements (Group 13 & 14)

In potash alum, the ratio of K ^+ and SO _4^ 2- ions is

In potash alum, the ratio of K

^+

and SO

_4^{2-}

ions is

Options

A $3:2$
B $1:2$
C $2:1$
D $2:3$

Correct answer

B. $1:2$

Step-by-step solution

The chemical formula of potash alum is

\text{K}_2\text{SO}_4 \cdot \text{Al}_2(\text{SO}_4)_3 \cdot 24\text{H}_2\text{O}

.

In one formula unit of potash alum, the number of

\text{K}^+

ions is

2

.

The number of

\text{SO}_4^{2-}

ions is

1 + 3 = 4

.

The ratio of

\text{K}^+

to

\text{SO}_4^{2-}

ions is

2:4

, which simplifies to

1:2

.

Answer:

1:2

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