Main 33 · Advanced 48
Isomerism
- Main 2022ChemistryInteger
Observe structures of the following compounds
The total number of structures/compounds which possess asymmetric carbon atoms is ______.
- Main 2022ChemistrySingle correct
Two isomers (A) and (B) with Molar mass 184 g/mol and elemental composition C, 52.2% ; H, 4.9 % and Br 42.9% gave benzoic acid and p-bromobenzoic acid, respectively on oxidation with . Isomer 'A' is optically active and gives a pale yellow precipitate when warmed with alcoholic . Isomer 'A' and 'B' are, respectively
- Main 2022ChemistryInteger
The number of chiral alcohol(s) with molecular formula is ______.
- Main 2022ChemistrySingle correct
Most stable product of the following reaction is :
- Main 2022ChemistryInteger
The number of sp hybridised carbons in an acyclic neutral compound with molecular formula is ______.
- Main 2022ChemistryInteger
In the given reaction
(Where Et is )
The number of chiral carbon/s in product A is ______.
- Main 2022ChemistryInteger
The total number of monobromo derivatives formed by the alkanes with molecular formula is (excluding stereo isomers) ______.
- Main 2022ChemistryInteger
Total number of isomers (including stereoisomers) obtained on monochlorination of methylcyclohexane is ______.
- Main 2022ChemistryInteger
Optical activity of an enantiomeric mixture is +12.6° and the specific rotation of (+) isomer is +30°. The optical purity is ______%.
- Main 2022ChemistrySingle correct
Compound 'A' undergoes following sequence of reactions to give compound 'B'. The correct structure and chirality of compound 'B' is
[where Et is −CH]
Compound 'A' (2-bromo-3-methylbutane) is treated with (i) Mg, EtO (ii) DO to give B.
- Main 2022ChemistrySingle correct
Given below are two statements.
Statement I: The compound (A) shown, a carbon bearing NO, H, a (Z)-prop-1-enyl group and an (E)-prop-1-enyl group, is optically active.
Statement II: The second compound shown is mirror image of above compound A.
In the light of the above statement, choose the most appropriate answer from the options given below.
- Main 2022ChemistryInteger
The number of stereoisomers formed in a reaction of (±)Ph(C=O)C(OH)(CN)Ph with HCN is _______.
[where Ph is −CH]
- Main 2022ChemistryInteger
The number of isomeric compounds (structural isomers only) possible with the molecular formula CHO, which do not react with metallic sodium is _______.
- Advanced 2021ChemistrySingle correct
Among the following, the conformation that corresponds to the most stable conformation of meso-butane-2,3-diol is
- Advanced 2021ChemistryMultiple correct
Given:
,
The compound(s), which on reaction with will give the product having degree of rotation, is(are)
- Advanced 2021ChemistryInteger
The maximum number of possible isomers (including stereoisomers) which may be formed on mono-bromination of 1-methylcyclohex-1-ene using and UV light is ____.
- Advanced 2020ChemistrySingle correct
Newman projections P, Q, R and S are shown below:
Which one of the following options represents identical molecules?
- Advanced 2020ChemistryList match
The Fischer projection of D-erythrose is shown below.
D-Erythrose and its isomers are listed as P, Q, R, and S in Column-I. Choose the correct relationship of P, Q, R, and S with D-erythrose from Column II.
- Advanced 2020ChemistryInteger
An organic compound () rotates plane-polarized light. It produces pink color with neutral solution. What is the total number of all the possible isomers for this compound?
- Advanced 2020ChemistryMultiple correct
Consider the following transformations of a compound P.
Choose the correct option(s).