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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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An element (X)(\mathrm{X}) reacts with hydrogen leading to formation of a class of compounds that is analogous to hydrocarbons. 5 g5 \mathrm{~g} of X\mathrm{X} forms 5.628 g5.628 \mathrm{~g} of a mixture of two compounds of X(XH4\mathrm{X}\left(\mathrm{XH}_4\right. and X2H6)\left.\mathrm{X}_2 \mathrm{H}_6\right) in the molar ratio of 2:1.2: 1. Determine the molar mass of X.\mathrm{X}.
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Correct option: A
28
Option A (28) is correct because applying the Principle of Atomic Conservation (POAC) on element X allows us to determine its molar mass.

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