The mass of iron converted | Mole Concept | JEE Main 2026

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JEE Main 2026

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Question

The mass of iron converted into $\mathrm{Fe}_3 \mathrm{O}_4$ by the action of 18 g of steam is :
(Given : Molar mass of $\mathrm{H}, \mathrm{O}$ and Fe are 1, 16 and $56 \mathrm{~g} \mathrm{~mol}^{-1}$ respectively)
Assume iron is present in excess :

Select the correct option:

A

2.1 g

B

4.2 g

C

21 g

D

42 g

✓ Correct! Well done.

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Solution

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