Which of the following statements are not cor | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) . Incorrect. The resonance hybrid is always more stable and has lower energy than any of the individual canonical structures.$b$. Correct. The ele

Vedclass · Accepted Answer

$a, c, d$

Vedclass · Answer

(A) . Incorrect. The resonance hybrid is always more stable and has lower energy than any of the individual canonical structures.$b$. Correct. The electromeric effect is a temporary effect and generally predominates over the permanent inductive effect when they oppose each other.$c$. Incorrect. The $+E$ effect occurs when $\pi$ electrons are transferred to the atom to which the attacking reagent gets attached. If they are transferred to the other atom,it is the $-E$ effect.$d$. Incorrect. Resonance structures with separation of opposite charges are less stable than those without charge separation,as they require energy to separate the charges.

Similar Questions

Explain the terms Inductive and Electromeric effects. Which electron displacement effect explains the following correct orders of acidity of the carboxylic acids?
$(a)$ $Cl_3CCOOH > Cl_2CHCOOH > ClCH_2COOH$
$(b)$ $CH_3CH_2COOH > (CH_3)_2CHCOOH > (CH_3)_3C \cdot COOH$

Which of the following does not show hyperconjugation?

The basic strength of $1,8-$bis(dimethylamino)naphthalene is $10^{10}$ times more than $1-$dimethylaminonaphthalene. The reason for this high basic strength is:

Identify the type of electromeric effect ($E$-effect) in the following reactions:
$(a) >C=C< + CN^{-} \to -C(CN)-C^{-}-$
$(b) >C=C< + H^{+} \to -C^{+}-CH-$

The decreasing order of $-I$ (inductive) effect power for the given groups is:
$A. -CN$
$B. -NO_2$
$C. -NH_2$
$D. -F$

Vedclass Test Series

Exam Paper Generator

Online Exam Module