Free Printable Inductive and resonance effect

1.

The inductive effect can be best described as:

a)

a) the conjugation of σ-bonding orbital with the adjacent π-orbital.

b)

b) the ability of atom or group to cause bond polarization

c)

c) the transfer of lone pair of electrons from more electronegative atom to lesser electronegative atom in a molecule.

d)

d) All of the above.

2.

Most stable carbocation is

a)

$CH_3-CH_2^+$

b)

$Br-CH_3-CH_2^+$

c)

$Cl-CH_3-CH_2^+$

d)

$F-CH_3-CH_2^+$

3.

Most stable carboanion is

a)

$\ ^{\Theta}CH_2-CH_2-NO_2$

b)

$\ ^{\Theta}CH_2-CH_2-COOH$

c)

$\ ^{\Theta}CH_2-CH_2-CN$

d)

$\ ^{\Theta}CH_2-CH_2-CH_2-CH_2-F$

4.

Identify the correct sequence with respect to Inductive effects.

a)

a) CF₃`> CH₂F`> CHF₂`> CF₃`

b)

b) CF₃`> CHF₂`> CH₂F`> CH₃`

c)

c) CH₃`> CH₂F`> CHF₂`> CF₃`

d)

d) CH₃`> CHF₂`> CH₂F`v CF₃`

5.

The correct order of acidic strength of following substituted phenols is :

a)

1

b)

2

c)

3

d)

4

6.

The strongest Lewis base in aqueous solution among the following is :

a)

a) CH₃NH₂

b)

b) (CH₃)₂NH

c)

c) (CH₃)₃N

d)

d) C₆H₅NH₂

7.

Which of the following group shows electron withdrawing inductive effect ?

a)

–CH₂CH₃

b)

– NO₂

c)

–C₆H₅

d)

–CH₃

8.

In which of the following hybridisation of carbon the -I effect is the greatest

a)

sp

b)

sp²

c)

sp³

9.

Which of the following is an incorrect statement about inductive effect?

a)

-I effect of a group weakens the O-H bond in -COOH & favours ionisation of a carboxylic acid

b)

It operates through space.

c)

Aniline is a weaker base than ammonia due to -I effect shown by the phenyl group.

d)

Alkyl groups are good examples of positive inductive effect.

10.

Which of the following is more basic than aniline?

a)

p-nitro aniline

b)

triphenylamine

c)

diphenylamine

d)

benzylamine

11.

In mesomeric effect the following electrons will delocalise:

a)

$p$

b)

$\pi$

c)

$s$

d)

$\sigma$

12.

Resonance forms are in equilibrium with each other.

a)

True

b)

False

13.

Find the correct statement among these

a)

It is permanent effect

b)

It involves the delocalisation of σ e^-

c)

The no. of paired/unpaired e^- can be unequal at times

d)

Noone of the above are correct

14.

Why phenol is more acidic than other alcohol ?

a)

Phenoxide ion is more stable due to resonance

b)

Phenoxide has higher steric effect

c)

Alkyl alcohols are having infinite canonical forms

d)

Alkyl alcohols show steric effect and nullify all other effect

15.

Which of the following is not +M GROUP?

a)

-CHO

b)

-NH₂

c)

-OH

d)

-X

16.

Which of the following is -M group?

a)

-OR

b)

-SH

c)

-NO₂

d)

-NR₂

17.

The most stable carbocation is

a)

b)

c)

d)

18.

WHICH OF THE FOLLOWING IS MOST ACIDIC?

a)

b)

c)

d)

19.

the above compound is less acidic than?

a)

(CH₃)₂NH

b)

o-Nitrophenol

c)

o-Cresol

d)

o-methoxyphenol

20.

Among the above the strongest base is

a)

1)

b)

2)

c)

3)

d)

4)

Inductive and resonance effect

Total questions: 20

Worksheet time: 10mins

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