What is the hybridisation state of benzyl carbonium ion ?

(a)

sp²

(b)

spd²

(c)

sp³

(d)

sp²d

Which of the following species is not electrophilic in nature ?

(a)

Cl⁺

(b)

BH₃

(c)

H₃O⁺

(d)

⁺NO₂

Hyper Conjugation is also known as ___________.

(a)

no bond resonance

(b)

Baker - nathan effect

(c)

both (a)and (b)

(d)

none of these

Which of the following species does not exert a resonance effect ?

(a)

C₆H₅OH

(b)

C₆H₅Cl

(c)

C₆H₅NH₂

(d)

\({ C }_{ 6 }{ H }_{ 5 }\overset { + }{ N } { H }_{ 3 }\)

Which of the following carbocation will be most stable ?

(a)

Ph₃C_-+

(b)

\({ C }{ H }_{ 3 }-\overset { + }{ C } { H }_{ 2 }\)

(c)

\(\left( { CH }_{ 3 } \right) _{ 2 }-\overset { + }{ C } { H }\)

(d)

\(CH_{ 2 }=CH-\overset { + }{ C } { { H }_{ 2 } }\)

Heterolytic fission of C-C bond results in the formation of _____________.

(a)

free radical

(b)

Carbanion

(c)

Carbocation

(d)

Carbanion and Carbocation

Which of the following species does not acts as a nucleophile ?

(a)

ROH

(b)

ROR

(c)

PCl₃

(d)

BF₃

Which of the following is heterolytic compound?

(a)

Pyrrole

(b)

Furan

(c)

Thiophene

(d)

All of these

The most stable carbanion is _____________

(a)

CH₃-CH₂

(b)

CH₂ = CH

(c)

CH₂ ≡ C

(d)

(CH₃)₂ - CH

In -NO₂, -NH₂, -SO₃H, the decreasing order of I II III -I effect is ___________

(a)

I > II > III

(b)

I > III > II

(c)

III > II > I

(d)

III > I > II

The nucleophile is not ___________

(a)

Lewis base

(b)

Lewis acid

(c)

\({ H }_{ 2 }\overset { .. }{ \underset { .. }{ O } } \)

(d)

Carbanion

Which of the following statements is not correct for a nucleophile ?

(a)

Nucleophiles attack low electron density sites

(b)

Nucleophiles are not electron seeking

(c)

Nucleophiles is a Lewis acid

(d)

Ammonia is a nucleophile

Assertion (A) : Phenol is less acidic than benzoic acid.
Reason (R) : Phenoxide has less number of resonating structures that benzyl carboxylate ion.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not correct explanation of A.
(c) A is true statement but R is false.
(d) Both A and R are false.

(a)

Both A and R are true and R is the correct explanation of A.

(b)

Both A and R are true but R is not correct explanation of A.

(c)

A is true statement but R is false.

(d)

Both A and R are false.

The electrometric effect is ___________

(a)

Permanent effect

(b)

Temporary effect

(c)

p-electrons transfer in the effect

(d)

Both (b) and (c)

Which one is incorrect match of reactions ?

(a)

(b)

\(C{ H }_{ 3 }-C{ H }_{ 2 }-Br\overset { aq.\quad KOH }{ \longrightarrow } C{ H }_{ 3 }-C{ H }_{ 2 }OH\) ⟶ Nucleophilic substitution reaction

(c)

(d)

\(\left( C{ H }_{ 3 } \right) C-Cl\overset { \overset { + }{ H } }{ \longrightarrow } { \left( C{ H }_{ 3 } \right) }_{ 3 }C-C{ H }_{ 2 }+{ H }_{ 2 }O+{ Cl }^{ - }\) ⟶ Nucleophilic substitution reaction

The stability of alkyl free radicals is due to ___________

(a)

Hyperconjugation

(b)

+I effect

(c)

-I effect

(d)

Both a & b

Which of the following compounds will not undergo Friedal-craft's reaction easily ?

(a)

Xylene

(b)

Nitrobenzene

(c)

Toluene

(d)

Cumene

Assertion (A) : \(C{ H }_{ 3 }-\overset { + }{ C } H-C{ H }_{ 3 }\) has 6 hyper-conjugative hydrogens. While \(C{ H }_{ 3 }-\overset { + }{ C } H-C{ H }_{ 2 }-C{ H }_{ 3 }\) has 5 hyper-conjugative hydrogens.
Reason (R) : \(C{ H }_{ 3 }-\overset { + }{ C } H-C{ H }_{ 3 }\) is more stable than \(C{ H }_{ 3 }-\overset { + }{ C } H-C{ H }_{ 2 }-C{ H }_{ 3 }\)
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) Both A and R are false.

(a)

Both A and R are true and R is the correct explanation of A.

(b)

Both A and R are true but R is not the correct explanation of A.

(c)

A is true but R is false.

(d)

Both A and R are false

Assertion (A) : Phenol is less acidic than benzoic acid.
Reason (R) : Phenoxide has less number of resonating structures than benzyl carboxylate ion.

(a)

Both A and R are true and R is the correct explanation of A.

(b)

Both A and R are true but R is not the correct explanation of A.

(c)

A is true but R is false.

(d)

Both A and R are false.

Which one of the following is positively charged electrophiles ?

(a)

CO₂

(b)

AlCl₃

(c)

BF₃

(d)

RX