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Question

A straight chain alkane is formed out of ten carbon atoms. How many hydrogen atoms will be there in that molecule?

A
Forty
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B
Twenty two
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C
Twenty
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D
Twenty one
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Solution

The correct option is B Twenty two
The general formula of a non-cyclic alkane is CnH2n+2, where 'n' is the number of carbon atoms. Hence, for an alkane having ten carbon atoms, there are (2×10)+2=22 hydrogen atoms.

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