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How many isomers exist for the molecular formula C4H10?
AOne
BThree
CTwo
DFour
Answer & Solution
Correct answer: C. Two
1. C4H10 corresponds to butane with the alkane formula CnH(2n+2).
2. The straight-chain version is n-butane (CH3-CH2-CH2-CH3).
3. A branched version has a methyl on the central carbon, called isobutane.
4. Both share the same molecular formula but differ in structure.
5. So C4H10 has exactly two structural isomers.
_Source: NCERT Class 10 Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_
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