Given below are two statements: 
 
Assertion (A): chlorine is an electron-withdrawing group, yet it is ortho-, para- directing in electrophilic aromatic substitution reactions.
Reason (R): Halogen atom is a ring deactivator.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.
 

 

Subtopic:  Haloarenes: Directive Influence of Halogen |
 54%
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Match the items in column I with the column II.
 

Column I: Structures Column II: IUPAC name
a. i. 4-Bromo- 3-methylpent-2-ene
b.  ii. 3-Bromo-2-methylpropene
c. iii.  1-Bromo-2-methylbut-2-ene
d. iv. 4-Bromopent-2-ene



1. a=iii; b=iv; c=i; d=ii
2. a=ii; b=iv; c=i; d=iii
3. a=iv; b=i; c=ii; d=iii
4. a=iv; b=ii, c=iv; d=iii

Subtopic:  Introduction and Physical Properties |
 81%
From NCERT
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Given below are two statements: 

Assertion (A): Vinyl halides do not undergo nucleophilic substitution easily.
Reason (R): Even though the intermediate carbocation is stabilized by loosely held p-electrons, the cleavage is difficult because of strong bonding.
 
Choose the correct answer from the options given below:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Chemical Properties |
From NCERT
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Ethylene chloride and ethylidene chloride are isomers. Identify the correct statements. 

a. Both the compounds form same product on treatment with alcoholic KOH 
b. Both the compounds form same product on treatment with aq. NaOH
c. Both the compounds form same product on reduction
d. Both the compounds are optically active

Choose the correct option

1. (a, b)

2. (b, c)

3. (c, d)

4. (a, c)

Subtopic:  Mechanism of Reactions | Chemical Properties |
 54%
From NCERT
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Which of the following statements is correct about the kinetics of the above-given reaction?

(i).  The rate of reaction depends on the concentration of only (b).
(ii).  The rate of reaction depends on the concentration of both (a) and (b).
(iii).  Molecularity of reaction is one.
(iv).  Molecularity of reaction is two.


Choose the correct option

1. (i, ii)

2. (ii, iii)

3. (iii, iv)

4. (i, iii)

Subtopic:  Mechanism of Reactions | Chemical Properties |
 71%
From NCERT
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Which of the following statements are correct about the mechanism of this reaction?
(i) A carbocation will be formed as an intermediate in the reaction.
(ii) OH will attach the substrate (b) from one side and Cl will leave it simultaneously from other side.
(iii) An unstable intermediate will be formed in which OH and Cl will be attached by weak bonds.
(iv) Reaction proceeds through SN1 mechanism 

Choose the correct option

1. (i, ii)

2. (ii, iii)

3. (iii, iv)

4. (i, iv)

Subtopic:  Mechanism of Reactions | Chemical Properties |
 69%
From NCERT
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The statements regarding the reaction intermediate are given below. 

i. Intermediate (c) is unstable because in this carbon is attached to 5 atoms.
ii. Intermediate (c) is unstable because carbon atom is sp2 hybridised.
iii. Intermediate (c) is stable because carbon atom is sp2 hybridised.
iv. Intermediate (c) is less stable than the reactant (b).


The correct statements are:

1. (i, ii)

2. (ii, iii)

3. (iii, iv)

4. (i, iv)

Subtopic:  Mechanism of Reactions | Chemical Properties |
 74%
From NCERT
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Which of the following statements are correct about this reaction?

(i) The given reaction follows SN2 mechanism.
(ii) (b) and (d) have opposite configuration.
(iii) (b) and (d) have the same configuration.
(iv) The given reaction follows SN1 mechanism


Choose the correct option:

1. (i, ii)

2. (ii, iii)

3. (iii, iv)

4. (i, iii)

Subtopic:  Mechanism of Reactions |
 80%
From NCERT
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Which of the statements are correct about the above reaction?
(i) (a) and (e) both are nucleophiles.
(ii) In (c) carbon atom is sp3 hybridized.
(iii) In (c) carbon atom is sp2 hybridized.
(iv) (a) and (e) both are electrophiles.

Choose the correct option

1. (i, ii)

2. (ii, iii)

3. (iii, iv)

4. (i, iii)

Subtopic:  Mechanism of Reactions |
From NCERT
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Statement I: Sulphuric acid not used during the reaction of alcohols with KI.
Statement II: H2SO4 is an oxidizing agent, it oxidizes HI produced in the reaction to I2 .
 


1. Both Statement I and II are true.

2. Statement I is true and statement II is false.

3. Both Statement I and II are false.

4. Statement I is false, Statement II is true.

Subtopic:  Chemical Properties |
 83%
From NCERT
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