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Faraday's First Law

0.197g of a s...

Question

0.197g of a substance, when heated with strong nitric acid and silver nitrate, gave 0.3525g of silver iodide. Percentage of iodine is:

A

95%

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B

96.70%

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C

95.50%

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D

98.05%

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Solution

The correct option is B 96.70%
% I = $\frac{A t o m i c m a s s o f \times}{m o l m a s s o f \times} \times \frac{m a s s o f A s i \times 100}{m a s s o f c o m p e d}$
% I = $\frac{127}{235} \times \frac{0.3525 \times 100}{0.197}$
% I = 96.7%

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