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Question

The molecular formula of a compound is C2X6. X is unknown . If the mass ratio of C to X is 4:1. Find X.



A

Helium

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B

Sodium

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C

Calcium

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D

Hydrogen

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Solution

The correct option is D

Hydrogen


Let the mass of the element X be ‘y’. so the mass ratio of carbon to X = (2×12)(6×y)=41

So y = 1

This means the mass of element X=1

So X is hydrogen


Chemistry

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