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0.70g mixture of (NH(4))(2)SO(4) was boi...

0.70g mixture of `(NH_(4))_(2)SO_(4)` was boiled with 100 ml of 0.2 N NaOH solution will all the `NH_(3)(g)` evolved and get dissolved to 250 mL and 10 mL of this solution was neutralised by using 10 mL of a 0.1 N `H_(2)SO_(4)`. The percentage purity of the `(NH_(4))SO_(4)` was boiled with 100 ml of 0.2 N NaOH solution till all the `NH_(3)(g)` evolved and get dissolved to 250 mL and 10 mL of this solution was neutralised by using 10 mL of a 0.1 N `H_(2)SO_(4)` solution. the percentage purity of the `(NH_(4))_(2)SO_(4)` sample is-

A

94.3

B

50.8

C

47.4

D

79.8

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The correct Answer is:
A
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