NEET Electron Displacement Effects Practice Questions With Solutions

NEET Chemistry Electron Displacement Effects Practice Questions

Biology Physics

Question 1.

Methyl group attached to a positively charged carbon atom stabilizes the carbocation due to:

A-I inductive effect

BElectromeric effect

CHyperconjugation

DMesomeric effect

Question 2.

A tertiary butyl carbocation is more stable than a secondary butyl carbocation because-

A+ R effect of

{C H}_{3}

groups

B

-

R effect of

-

CH₃ groups

CHyperconjugation

D

-

l effect of

-

CH₃ groups

Question 3.

The correct order with respect to –I effect of the substituents is: (R = alkyl)

A–NH₂ > –OR < –F

B–NR₂ < –OR < –F

C–NH₂ > –OR > –F

D–NR₂ > –OR > –F

Question 4.

The most stable carbocation among the following is:

A

`

B

C

D

Question 5.

Hyperconjugation occurs among the following compounds:

AI only

BII only

CIII only

DI and III

Question 6.

What is the correct sequence of acidity for the following compounds?

ACH₃COOH > BrCH₂COOH > ClCH₂COOH > FCH₂COOH

BFCH₂COOH > CH₃COOH > BrCH₂COOH > ClCH₂COOH

CBrCH₂COOH > ClCH₂COOH > FCH₂COOH > CH₃COOH

DFCH₂COOH > ClCH₂COOH > BrCH₂COOH > CH₃COOH

Question 7.

Which amongst the following is the most stable carbocation:

A

B

C

D

Question 8.

Polarisation of electrons in acrolein may be written as:

A

\overset{+ δ}{C} H_{2} = C H - \overset{- δ}{C} H O

B

\overset{- δ}{C} H_{2} = C H - \overset{+ δ}{C} H O

C

\overset{- δ}{C} H_{2} = C H - \overset{}{C} \overset{+ δ}{H} O

D

\overset{+ δ}{C} H_{2} = C H - C H \overset{- δ}{O}

Question 9.

The correct order of stability is:

A1–butene > Trans–2–butene > Cis–2–butene

BTrans–2–butene > 1–butene > Cis–2–butene

CTrans–2–butene > Cis–2-butene > 1–butene

DCis-2–butene > Trans–2–butene > 1–butene

Question 10.

The correct order of –I effect is:

A-NR₃⁺ > -OR > -F

B-F > -NR₃⁺ > -OR

C-NR₃⁺ > -F > -OR

D-OR > -NR₃⁺ > -F

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