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Q.

What mass of ${HNO}_{3}$ is needed to convert 5gm of iodine into iodic acid according to the reaction ?
$I_{2} + {HNO}_{3} ⟶ {HIO}_{3} + {NO}_{2} + H_{2} O$

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a

12.4 gm

b

0.248 gm

c

1.24gm

d

24.8 gm

answer is A.

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Detailed Solution

In the given reaction,

$I_{2} + 10 {HNO}_{3} \to 2 {HIO}_{3} + 10 {NO}_{2} + 4 H_{2} O$

Here, mass of ${HNO}_{3}$ ,

$\frac{5}{254} \times 10 \times 63 = 12.4 g$ .

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