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If 5g of Iron filling was reacted with excess dilute H\(_2\)SO\(_4\) to evolve hydrogen gas,...

Chemistry
JAMB 2025

If 5g of Iron filling was reacted with excess dilute H\(_2\)SO\(_4\) to evolve hydrogen gas, which came to completion after 10 min, calculate the rate of reaction in g/hr.

  • A. 5
  • B. 30
  • C. 20
  • D. 10
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Correct Answer: Option B
Explanation

Given :

Mass of Iron reacted, m = 5g

time taken, t = 10 mins

However, we must convert the time from mins to hour because of the examiner's demand.

Thus, t = \(\frac{10}{60}\) hr = 0.167

Rate of reaction = \(\frac{mass of reacted iron}{time taken}\)

                          = \(\frac{5}{0.167}\)

                          = 29.94

                          = 30 g/hr

The correct answer is option B.

 

There is an explanation video available below.


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Explanation Video

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