Isomerism – JEE Advanced Previous Year Questions with Solutions

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Q. The correct statement(s) about the compound $\mathrm{H}_{3} \mathrm{C}$ (HO)HC – CH = CH – CH(OH) $\mathrm{CH}_{3}$ (X) is (are) : (A) The total number of stereoisomers possible for X is 6 (B) The total number of diastereomers possible for X is 3 (C) If the stereochemistry about the double bond in X is trans, the number of enantiomers possible for X is 4 (D) If the stereochemistry about the double bond in X is cis, the number of enantiomers possible for X is 2 [iit-2009]

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Sol. (A,D)

Q. In the Newman projection for 2,2–dimethylbutane – X and Y can respectively be – (A) H and H (B) $\mathrm{H}$ and $\mathrm{C}_{2} \mathrm{H}_{5}$ (C) $\mathrm{C}_{2} \mathrm{H}_{5}$ and $\mathrm{H}$ (D) $\mathrm{CH}_{3}$ and $\mathrm{CH}_{3}$ [iit-2010]

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Sol. (B,D)

Q. Amongst the given option, the compound(s) in which all the atoms are in one plane in all the possible conformations (if any), is (are) – [iit-2011]

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Sol. (B,C)

Q. Which of the given statement(s) about N,O,P and Q with respect to M is (are) correct ? (A) M and N are non-mirror image stereoisomers (B) M and O are identical (C) M and P are enantiomers (D) M and Q are identical [JEE-2012]

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Sol. (A,B,C)

Q. The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are) : [JEE-2014]

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Sol. 3

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