The hydrolysis of alkyl halides by aqueous NaOH is best termed as:

(1) electrophilic substitution reaction

(2) electrophilic addition reaction

(3) nucleophilic addition reaction

(4) nucleophilic substitution reaction

Subtopic:  SN1 & SN2 Reactions |
 64%
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SN1 reaction on optically active substrates mainly gives:

1. Retention in configuration

2. Inversion in configuration

3. Racemic product

4. No product is obtained

Subtopic:  SN1 & SN2 Reactions |
 69%
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"The negative part of the addendum adds on the carbon atom joined to the least number of hydrogen atoms." This statement is called as:

(1) Markownikoff's rule

(2) Peroxide effect

(3) Baeyer's strain theory

(4) Thiele's theory

Subtopic:  Addition Reaction of C=C |
 79%
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Heterolysis of propane gives:

(1) Methyl and ethyl free radicals

(2) Methylium cation and Ethyl anion

(3) Methyl anion and Ethylium cation

(4) Methylium and Ethylium cations

Subtopic:  Reaction Intermediates |
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Amongst the following which of the above are true for SN2 reaction?

(i) The rate of reaction is independent of the concentration of the nucleophile

(ii) The nucleophile attacks the carbon atom on the side of the molecule opposite to the group being displaced.

(iii) The reaction proceeds with simultaneous bond formation and bond rupture.

1. (i), (ii)

2. (i), (iii)

3. (i), (ii), (iii)

4. (ii), (iii)

Subtopic:  SN1 & SN2 Reactions |
 62%
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Carbanions initiate:

(1) addition reactions

(2) substitution reaction

(3) both (1) and (2)

(4) none of these

Subtopic:  SN1 & SN2 Reactions |
 63%
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Dehydrogenation of ethanol to give ethanal is:(1) additional reaction  
(2) αα elimination reaction   
(3) αβ elimination reaction   
(4) αγ elimination reaction

Subtopic:  Hofmann's Elimination & Saytzeff Elimination |
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Ease of abstraction of hydrogen is greater when attached to:

(1) 1° carbon

(2) 2° carbon

(3) 3°carbon

(4) neo carbon

Subtopic:  Addition Reaction of C=C |
 65%
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Which step is the chain termination step in the following mechanism?

(i) Cl2hνCl+Cl
(ii) Cl+ CH4CH3+ HCl
(iii)CH3+Cl2CH3Cl+Cl
(iv)Cl+CH3CH3Cl

1. (i)

2. (ii)

3. (iii)

4. (iv)

Subtopic:  Reaction Intermediates |
 70%
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Which step is chain propagation step in the following mechanism?

(i) Cl2hνCl+Cl
(ii) Cl+ CH4CH3+ HCl
(iii)Cl+ClCl2
(iv)CH3+ HClCH3Cl

1. (i)

2. (ii)

3. (iii)

4.  (iv)

Subtopic:  Addition Reaction of C=N, C=0 |
 68%
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