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ChemistryJEE Main 2 Apr 2026, Shift 1·Q1·MCQ·Easy–moderate

Some Basic Concepts · Stoichiometry of iron with steam

The mass of iron converted into FeX3OX4\ce{Fe3O4} by the action of 18 g of steam is :

(Given : Molar mass of H, O and Fe are 1, 16 and 56 g mol−1^{-1} respectively)

Assume iron is present in excess :

  1. (1)2.1 g
  2. (2)4.2 g
  3. (3)21 g
  4. (4)42 g

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See the full 2 Apr 2026, Shift 1 paper