COMPASSLearning
RegisterLogin

JEE Main · 2007 · 29 Apr 2007 · Offline · General Organic Chemistry

WhatsApp Email
Which of the following molecules is expected to rotate the plane of plane polarized light?
  1. (A)(see structure)
    ✓ Correct
  2. (B)(see structure)
  3. (C)(see structure)
  4. (D)(see structure)

Answer: (A)

Solution

A molecule turns the plane of polarised light only when it is chiral, which here means it carries a carbon bonded to four different groups and has no internal mirror plane. Three of the structures possess a plane of symmetry and so are optically inactive in spite of their substitution. The remaining one has a genuine stereocentre with four distinct groups, and that is the molecule able to rotate the plane of polarisation.

JEE Main · 2007 · 29 Apr 2007 · Offline · Single correct option

Practise more: all JEE Main PYQs on General Organic Chemistry →

More JEE Main questions on General Organic Chemistry

  1. From the following, the least stable structure is:
    JEE Main 2026View solution →
  2. Identify correct statement from the following:

    A. Propanal and propanone are functional isomers.
    B. Ethoxyethane and methoxypropane are metamers.
    C. But-2-ene shows optical isomerism.
    D. But-1-ene and but-2-ene are functional isomers.
    E. Pentane and 2, 2-dimethyl propane are cha …
    JEE Main 2026View solution →
  3. Match List-I with List-II.

    List-I (Pair of Compounds):
    A. 2-Methylpropene and but-1-ene
    B. Cis-but-2-ene and trans-but-2-ene
    C. 2-Butanol and diethyl ether
    D. But-1-ene and but-2-ene

    List-II (Type of Isomers):
    I. Stereoisomers
    II. Position isomers
    III. Chain isomers
    IV. Functio …
    JEE Main 2026View solution →
  4. Given below are two statements:

    Statement-I: Compound (X), shown below, dissolves in solution and has two chiral carbon atoms

    Statement-II: Compound (Y), shown below, has two carbons with hybridization, one carbon with an …
    JEE Main 2026View solution →
  5. The IUPAC name of the following comopound is :
    JEE Main 2026View solution →
  6. Consider all the structural isomers with molecular formula are separately treated with KOH (aq) to give respective substitution products, without any rearrangement. The number of products which can exhibit optical isomerism from these is ____ .
    JEE Main 2026View solution →