An aromatic compound A (C8H10O) gives the following tests with the given reagents.

The structure of  'A' is:

1.  2.
3. 4.

Subtopic:  Alcohols: Preparation & Properties |
 64%
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Compound Y,  C7H8O is insoluble in water, dil HCI and aqueous NaHCO3. It dissolves in dilute NaOH. When Y is treated with bromine water it is converted rapidly into a compound of formula C7H5OBr3.  The structure of Y is:

1.    2.  
3. 4.
Subtopic:  Phenols: Preparation & Properties |
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Compounds I and II can be distinguished by using reagent:

(I)   4–Amino–2–methlbut–3–en–2–ol  
(II)   4–Amino–2,2–dimethylbut–3–yn–1–ol  


1. NaNO2/HCl

2. Br2/H2O

3. HCl/ZnCl2 (anhydrous)

4. Cu2Cl2 + NH4OH

Subtopic:  Alcohols: Preparation & Properties |
 67%
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CH2Cl2Br2 W. Product W is:

1. 

2. 

3. 

4. 

Subtopic:  Mechanism of Dehydration, Methanol & Ethanol |
 58%
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The correct order of dehydration of compounds (i), (ii) and (iii) by conc. H2SO4 is:

(i) 
(ii) 
(iii)

1. (i) > (iii) > (ii)                                             

2. (i) > (ii) > (iii)

3. (ii) > (i) > (iii)                                             

4. (ii) > (iii) > (i)

Subtopic:  Mechanism of Dehydration, Methanol & Ethanol |
 62%
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Product (x) will be:

(a) 

(b) 

(c) 

(d) 

Subtopic:  Alcohols: Preparation & Properties |
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In each of the following groups, which is the strongest (best) nucleophile ?

(I)(1)H3C-O-            (2)                   (3)H3C-S- in CH3OH

(II)(1)OH-                (2) H2O                        (3) NH2- in DMF

(III) (1)   (2)                  (3) CH3O- in DMSO

(a) I,3; II,3; III,2                                  (b) I,2; II,1; III,3

(c)  I,1; II,2; III,1                                 (d) I,3; II,1; III,3

Subtopic:  Alcohols: Preparation & Properties |
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(A) on heating isomerizes to (B). What is the structure of (B) ?

Subtopic:  Mechanism of Dehydration, Methanol & Ethanol |
 56%
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Which of the following statements is true?

(1) CH3CH2S- is both a stronger base and more nucleophilic than CH3CH2O-

(2) CH3CH2S- is a stronger base but is less nucleophilic than CH3CH2O-

(3) CH3CH2S- is a weaker base but is more nucleophilic than CH3CH2O-

(4) CH3CH2S- is both a weaker base and less nucleophilic than CH3CH2O-

Subtopic:  Alcohols: Preparation & Properties |
 50%
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What sequence of reagents is required to accomplish the following transformation?

1. (1) NBS, ROOR (2) CH3CH2O- (3)2HBr (4) NH-2 (5) disiamylborane (6) H2O2,OH-

2. (1) Cl2hv (2) OH-, heat; (3) 2HCl (4) OH-,heat (5) HgSO4,H2SO4

3. (1) NBs,ROOR; OH-,DMSO

4. (1) Br2,hv (2) t-butoxide (3) BH3,THF (4) H2O2,OH-

Subtopic:  Alcohols: Preparation & Properties | Mechanism of Dehydration, Methanol & Ethanol |
 57%
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