Find out the statements which are not true.
A. Resonating structure with more number of covalent bonds and lesser charge separation are more stable.
B. In electromeric effect, an unsaturated system shows +E effect with nucleophile and -E effect with electrophile.
C. Inductive effect is responsible for high melting point, boiling point and dipole moment of polar compounds.
D. The greater the number of alkyl groups attached to the doubly bonded carbon atoms, higher is the heat of hydrogenation.
E. Stability of carbanion increases with the increase in s-character of the carbon carrying the negative charge.
Choose the correct answer from the options given below.
A. Resonating structure with more number of covalent bonds and lesser charge separation are more stable.
B. In electromeric effect, an unsaturated system shows +E effect with nucleophile and -E effect with electrophile.
C. Inductive effect is responsible for high melting point, boiling point and dipole moment of polar compounds.
D. The greater the number of alkyl groups attached to the doubly bonded carbon atoms, higher is the heat of hydrogenation.
E. Stability of carbanion increases with the increase in s-character of the carbon carrying the negative charge.
Choose the correct answer from the options given below.
- (A)A, D & E only
- (B)B, D & E only
- (C)A, C & D only
- (D)B & D only✓ Correct
Answer: (D)
Solution
Each statement is tested. A is correct: canonical structures with more covalent bonds and less charge separation contribute more to the hybrid. B is wrong: in the electromeric effect the unsaturated system shows the effect towards a nucleophile and the effect towards an electrophile, the reverse of what is written. C is correct: the inductive polarity of polar molecules raises their melting point, boiling point and dipole moment. D is wrong: more alkyl groups on the doubly bonded carbons make the alkene more stable through hyperconjugation and so lower, not raise, its heat of hydrogenation. E is correct: greater s-character holds the lone pair closer to the nucleus and stabilises the carbanion. The statements that are not true are B and D.
JEE Main · 2026 · 24 Jan 2026 · Shift 2 · Single correct option