Q30 / 90 · JEE Main 2022 (25 Jun Shift 2) · Chemistry

The neutralization occurs when $10 mL$ of $0.1 M$ acid ' $A$ ' is allowed to react with $30 mL$ of $0.05 M$ base $M {(OH)}_{2}$ . The basicity of the acid ' $A$ ' is
[ $M$ is a metal]

Correct answer: 3

Solution

Let basicity of acid is $x$

$A + M {(OH)}_{2} ⟶ [Salt + Water]$

At complete neturization.

Milli eq. of acid $=$ Milli eq. of base

$n [0.1 \times 10] = 2 [0.05 \times 30]$

$n = 3$

Hence, the correct answer is 3.

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