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Question

An organic compound has molecular formula C9H18. Its all carbon atoms are sp3 hybridized and its all hydrogen atoms are identical. Its structural formula can be

A
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B
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C
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D
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Solution

The correct option is B
For a compound with molecular formula CcHhXxNnOo
Degree of unsaturation=(c+1)h2x2+n2
Where, X = Halogen
c=number of carbon atom
h=number of hydrogen atom
n=number of nitrogen atom
o=number of oxygen atom
In C9H18O
Degree of unsaturation=(9+1)182=1
Compound has one degree of unsaturation, it can either one ring or one double bond.
All have sp3 hybridized carbons so cannot have double bond thus one ring will be present.
Also, all hydrogens are identical as per question.
Hence coorect option is b.

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