Which of the following statements about the SN1 reaction is correct?

1. 100 % racemisation
2. Inversion more than retention leading to partial racemisation
3. 100 % retention
4. 100 % Inversion

Subtopic:  Mechanism of Reactions |
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Which of the following compounds, when hydrolyzed with aqueous KOH, undergoes racemization?

(i)  (ii) CH3CH2CH2Cl
(iii) (iv)


1. (i) and (ii)

2. (ii) and (iv)

3. (iv) only

4. (i) and (iv)

Subtopic:  Chemical Properties | Isomerism & Chirality |
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The end product (C) in the below mentioned reaction is:
\(H_3C-Br\xrightarrow{\bf KCN }A\xrightarrow{ \bf H_3O^+~~}B\xrightarrow[\bf\text{Ether}]{~~LiAlH_4~~}C\)


1. Acetone
2. Methane
3. Acetaldehyde
4. Ethyl alcohol
Subtopic:  Mechanism of Reactions |
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Which of the following compounds undergoes nucleophilic substitution reaction most easily?

1. 2.
3. 4.
Subtopic:  Mechanism of Reactions |
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Consider the reactions :

(i) \(\small{{(CH_3)}_2CHCH_2Br\ \xrightarrow[]{C_2H_5OH}{(CH_3)}_2CHCH_2OC_2H_5 + HBr}\)
(ii) \(\small{{(CH_3)}_2CHCH_2Br\ \xrightarrow[]{C_2H_5O^-}{(CH_3)}_2CHCH_2OC_2H_5 + Br^-}\)

The mechanisms of reactions (i) and (ii) are, respectively:
1. SN2 and SN1
2. SN1 and SN2
3. SN1 and SN1
4. SN2 and SN2
Subtopic:  Mechanism of Reactions |
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In the following compounds, the correct order of increasing C-X bond reactivity toward nucleophiles is:

      I      II        III         IV


1. I < II < IV < III

2. II < III < I < IV

3. IV < III < I < II

4. III < II < I < IV

Subtopic:  Physical Properties | Chemical Properties |
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Which of the following reactions cannot form new carbon-carbon bonds?

1. Reimer-Tiemann reaction

2. Cannizaro reaction

3. Wurtz reaction

4. Friedel-Crafts acylation

Subtopic:  Mechanism of Reactions |
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In the following reaction



The product 'X' is:

1. C6H5CH2OH

2. C6H5CH3

3. C6H5CH2CH2C6H5

4. C6H5CH2OCH2C6H5

Subtopic:  Chemical Properties |
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Iodoform reaction is given by:
(a) CH3CH2OH (b) CH3COCH3
(c) (d) CH3OH

1. Only (b)

2. (a), (b) and (c)

3. (a) and (b)

4. (a), (c) and (d)

Subtopic:  Iodoform, Freons & DDT |
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For the following : 
(i) I- 
(ii) Cl- 
(iii) Br- 
The increasing order of nucleophilicity in would be :

1. I-<Br-<Cl-

2. Cl-<Br-<I- 

3. I- <Cl-<Br-

4. Br-<Cl-<I-

Subtopic:  Mechanism of Reactions |
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