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Question

Assertion :The gram molecular mass of glucose is 180 gram. Reason: The atomicity of glucose is 24.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The number of atoms in the molecules of an element is known as atomicity. Atomicity of glucose (C6H12O6) is (6+12+6)=24

The molar mass of glucose can be calculated from the molar masses of individual atoms present in it.

From the molecular formula, C6H12O6, one can find there are 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms in one molecule of glucose.

So, the molecular mass is (12×6)+(1×12)+(16×6)=180 g/mol

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