C4.pdf

NARAYANA IIT ACADEMY INDIA

CHEMISTRY-ASSIGNMENT-4 GOC & BENZENE

Sec: Sr.IIT-IZ & NIZ-COSPARK

PONGAL WORKSHEET

MULTIPLE CHOICE QUESTIONS 1. Which of the following does not participate (or) give poor yield in Friedal – Craft reactions ? 

NMe3

NO2

A) 2.

B)

COOH

NH 2

C)

D)

Reactions in which acylated product is predomdinant are O Anhy. AlCl3  C6 H 5  C  Cl  

A)

B)

O Anhy. AlCl3 + Ph3C  C  Cl   O  CH 3  C  Cl  

C)

O Anhy AlCl3  C2 H 5  C  Cl   D) CH 3 Br

2  

3.

Possible products in the following reaction are

CH 3

SO3 H

CH 3

CH 3

Br

CH 3 Br

A)

SO3 H

B)

Br

C)

SO3 H

D)

Narayana IIT Academy

Sr.IIT-IZ & NIZ-COSPARK_PONGAL WORKSHEET

Cl

2  H O

4.

2

 in absence of light  The products which are NOT possible in the above reaction are Cl

Cl

OH

OH

OH

A) 5.

B)

OH

C)

D)

Optical inactivity of Cis-1,2-dimethyl cyclohexane is due to A Plane of symmetry B) Existance of mirror images of gancha form in equal amounts. C) Axis of of symmetry D) Centre of symmetry HCl

6.

? The possible products are

Ph Cl

Ph

A) 7.

Ph

Ph

B)

C)

Ph

D)

For the reactions shown below, identify the correct statement(s) with regard to the products formed H

i)

8.

H

O

O

ii) Ph

MeOH  P H+

Ph

MeONa  Q MeOH

A) P and Q are identical

B) P is recemic and Q is optically active

C) P and Q are positional isomers

D) Both are optically active

In the alkylatio nof benzene, stable  - complex 

H

H

CH3

A)

CHEMISTRY ASSIGNMENT-4

H

CH3

B) 

C)



H

CH 3

D)



CH 3

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9.

Sr.IIT-IZ & NIZ-COSPARK_PONGAL WORKSHEET

The correct statements are A) Protonation increases electrophilic nature of carbonyl group 

B) CF3 SO3 is better leaving group than CH 3SO3



C) Benzyl carbonium ion is stabilized by resonance D)

OH OH

CCl3 CH

is stablised by intramolecular hydrogen bond

CH 3

CH 3 Cl

H

H

H

H

H

10.

H

H

CH 3

CH 2Cl

A

 B

The correct statements regarding the above compounds are: A) The two are position isomers B) None of the two shows optical isomerism C) Only A shows optical isomerism D) The two are not related to each other regarding isomerism. 11.

Resonance can explain the stability of O

CH 2  O O



A)  CH3 2 C OH 12.

B)

NO2

C)

NO 2

D)

NO 2

Tautomerism is shown by OH

O A)

B) NH 2  C  NH 2

N=O

S C) H 2 N  C  NH 2

D)

OH N

HO

N N

OH

CHEMISTRY ASSIGNMENT-4

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13.

Sr.IIT-IZ & NIZ-COSPARK_PONGAL WORKSHEET

Which of the following statements is(are) true regarding E 2 reactions of alkylhalides which follow the order 30  20  10 alkyl halide. A) 30 alkyl halides form most stable carbocation B) Increased branching (from 10 to 30 halide) successively provides greater number of hydrogens to be eliminated as H  C) Increased branching leads to the more stable alkene D) Increased branching facilitates the formation of transition state.

14.

Which of the following alkenes are more stable than ?

A) 15.

B)

D)

Which of the following ions will be aromatic in nature ?



A)

16.

C)

Cl H  H

N

B)

H



N

C)

D)

H

H

Which of the following aromatic rings have greater electron density than CH 3 C

CH 3

?

H

CO

: NH 2

A) 17.

CH 3

B)

CH 2CH 3

C)

D)

Which of the following carbanions are not resonance stabilized ?

O

O

A) CHEMISTRY ASSIGNMENT-4

O B)

O C) O

O

O

D)

.. O ..

O Page 4

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18.

Sr.IIT-IZ & NIZ-COSPARK_PONGAL WORKSHEET

Pyridine is more basic than pyrrole. Which of these following statements explain this fact ? A) In pyrrole lone pair is involved in aromaticity, in pyridine lone pair is not involved in aromaticity it is free for donation B) Conjugated acid of pyridine remains aromatic but pyrrole does not remain aromatic.

N

H



H

Non Aromatic

N

H Aromatic

C) +I power in pyrrole is greater than pyridine D) +M power of pyrrole is greater than pyridine 19.

Which of the following compounds will create electron at ortho and para greater than

OH

CH 3

A)

20.

B)

HO

NH 2

C)

O C

D)

Which of the following compounds exhibit aromatic character ?

O

A)

CHEMISTRY ASSIGNMENT-4

B)

C)

D)

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21.

Sr.IIT-IZ & NIZ-COSPARK_PONGAL WORKSHEET

Which of the following represent correct matching ?

O

O

A) CH3  C  OH and H  C  OCH 3

Metamers

B) CH 3  CH 2  C  CH and CH 3  C  C  CH 3 Position isomers C) CH 3CH 2CH 2 NH 2 and CH 3  CH  CH 3

Tautomers

NH 2

D) CH 3CH 2OH and  CH 3 2 O 22.

Functional isomers

Which of the following is chiral ? CH 3

CH 3

A) 23.

SO

C6 H 5

C6 H 5

C)

SO

D) H 3C

Which of the following are identical molecules ? COOH

COOCH 3

COOCH 3

H

OH

H

OH

HO

H

OH

H

OH

HO

COOCH 3

A) 24.

Ph

B)

H 3C

C2 H 5  N   H

H 3C

C2 H 5  P  0

COOH

B)

H

H H COOH

C)

HO

COOH

H 3COOC

H OH

D)

Which of the following will show optical isomerism ? Br H

Cl

CH 3

A)

B)

H 3C

CH 3

Cl Br H 3C

C) 25.

HO3 S SO3 H

D)

H

Cl

C C C C C OH

Choose the compounds below that are aromatic: :O :

A)

CHEMISTRY ASSIGNMENT-4

B)

C)

O

D)

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