Exams › JEE Main › Chemistry

For the statements given below, choose the correct sequence of T and F, where T means the statement is true and F means it is false: (i) A greater number of contributing resonance forms leads to greater resonance energy. (ii) Resonance forms differ in the positions of nuclei but contain the same number of unpaired electrons. (iii) The actual molecular structure, called the resonance hybrid, has lower energy than any of the canonical forms.

1. TTT
2. TFT
3. FFF
4. TFF

Correct answer: FFF

Solution

All three statements are false: (i) more resonance forms do not necessarily lead to greater resonance energy, (ii) resonance forms differ in electron distribution, not in the positions of nuclei, and (iii) the resonance hybrid typically has energy that is lower than the average of the canonical forms, not lower than any individual form.

Related JEE Main Chemistry questions

• Which statement is correct about hyperconjugation, also called no-bond resonance?
• Lactic acid loses its optical activity when the hydroxyl group is replaced by hydrogen because
• Which is the most suitable technique for separating a mixture of sugars?
• Which of the following compounds fails to give a positive Lassaigne’s test for nitrogen?
• Which statement correctly compares the staggered and eclipsed conformations of ethane?
• Arrange the following carbanions in decreasing order of stability: (I) RC\equiv C^- (II) C_6H_5^- (III) R_2C=CH^- (IV) R_3C–CH_2^-

⚔️ Practice JEE Main Chemistry free + battle 1v1 →