Arrange the reactivity of the given compounds in decreasing order for addition followed by elimination reaction:

(i) p-Cl-C6H4-CHO

(ii) p-Br-C6H4-CHO

(iii) p-F-C6H4-CHO

(iv) p-I-C6H4-CHO

Select the correct answer from the codes given below:

Codes:

(1) (i), (iii), (ii), (iv)

(2) (i), (iii), (iv), (ii)

(3) (iii), (i), (iv), (ii)

(4) (iii), (i), (ii), (iv)

Subtopic:  Directive Effect of functional grp |
 74%
From NCERT
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Which compound will form Schiff base with carbonyl compounds?

(1) p-amines 

(2) sec-amines

(3) bydroxylamine

(4) Hydrazine

Subtopic:  Reagents |
From NCERT
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Gem di-ether is obtained by:

(i) aldehyde, alcohol, H

(ii) ketone, alcohol, H

(iii) ketone, alcohol, OH

(iv) aldehyde, alcohol, OH

Select the correct answer from the codes given below:

Codes:

(1) (i), (ii), (iii) and (iv)

(2) (i), (ii) and (iv)

(3) (iii) and (iv)

(4) (i) and (ii)

Subtopic:  SN1 & SN2 Reactions | Reactions in Ether & Alcohol |
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Which among the following compounds will give addition reaction with water?

(i) CH3-CH=CH2

(ii) CH3-CCH

(iii) CCl3-CHO

(iv) CH3-CHO

Select the correct answer from the codes given below:

Codes:

(1) (i), (ii), (iii)

(2) (i) and (ii)

(3) (i), (ii), (iv)

(4) only (iii)

Subtopic:  Addition Reaction of C=N, C=0 |
From NCERT
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Which among the following compounds is used for protection of carbonyl groups?

1. HCN

2. CH3OH

3. 

4.  C2H5OH

Subtopic:  Addition Reaction of C=N, C=0 |
 63%
From NCERT
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In the given reaction,

CH3-CN H2O/(A)H2O/H/(B)

(A) and (B) respectively are:

(1)           O
          
CH3-C-NH2 and CH3COOH

(2) CH3COONH4 and CH3COOH

(3) CH3CONH2 and CH3COONH4

(4) CH3-CH=NH and CH3COOH

Subtopic:  SN1 & SN2 Reactions |
 66%
From NCERT
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Which among the following compounds will give nucleophilic addition reaction?

(1)            O
           
C6H5-C-Cl

(2)          O       
         
CH3-C-NH2

(3)

 

(4)          O
         
CH3-C-OC2H5

Subtopic:  Addition Reaction of C=N, C=0 |
 54%
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Which among the following reagents can be used for the test of carbonyl group in laboratory?

1. NH2OH

2. NH2NH2

3. NaSO3H

4. 2,4-DNPH

Subtopic:  Reagents |
 61%
From NCERT
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In the reaction sequence,

[X] will be:

1. 2. CH3COOH
3. C6H5-NH2 4. CH3-CO-NH-C6H5
Subtopic:  Addition Reaction of C=N, C=0 |
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Consider the following statements for carbonyl compounds:

(i) They give nucleophilic addition reaction.

(ii) Aldehyde is more reactive than ketone for nucleophilic addition reaction.

(iii) β-hydrogen of carbonyl compound is more acidic than α-hydrogen.

(iv) They give addition reaction followed by elimination reaction with NH2-NH-C6H4-CH3.

Of these statements:

(1) (i) and (ii) are correct

(2) (i), (ii) and (iv) are correct

(3) (i), (ii) and (iii) are correct

(4) (i), (ii), (iii) and (iv) are correct

Subtopic:  Addition Reaction of C=N, C=0 |
 52%
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