Y is 

. The product B is

• 

• 

• 

• None of these

Replacement of Cl of chlorobenzene to give phenol requires drastic conditions, but Cl of 2, 4-dinitrochlorobenzene is readily replaced. This is because

• -NO₂ group makes the ring electron rich at ortho and para-positions

• -NO₂ group withdraws electrons from meta-position

• -NO₂ donates electrons at meta-position

• -NO₂ withdraws electrons from ortho and para-positions

In the reaction,

Ethanol $\stackrel{{\mathrm{PCl}}_5}{\to } \mathrm{X} \stackrel{\mathrm{alc}. \mathrm{KOH}}{\to } \mathrm{Y} \underset{{\mathrm{H}}_2\mathrm{O}, ∆}{\overset{{\mathrm{H}}_2{\mathrm{SO}}_4, \mathrm{room} \mathrm{temp}}{\to }} \mathrm{Z}$

The product Z is

• C₂H₄

• CH₃CH₂OCH₂CH₃

• CH₃CH₂OSO₃H

• 

Which of the following compounds is most acidic?

• Cl-CH₂-CH₂-OH

• 

• 

• 

The reaction which involves dichlorocarbene as an electrophile is

• Reimer-Tiemann reaction

• Kolbe's reaction

• Friedel-Craft's acylation

• Fittig reaction

Ethanol is converted into ethoxy ethane,

• by heating excess of ethanol with conc. H₂SO₄ at 140°C

• by heating ethanol with excess of conc. H₂SO₄ at 443 K

• by treating with conc. H₂SO₄ at room temperature

• by treating with conc. H₂SO₄ at 273 K

100 cm² of 1 M CH₃COOH was mixed with 100 cm³ of 2M CH₃OH to form an ester. The change in the initial rate if each solution is diluted with equal volume of water would be

• 2 times

• 4 times

• 0.5 times

• 0.25 times

239.

Arrange the following compounds in the increasing order of their acidic strength.

I. m-nitrophenol

II. m-cresol

III. Phenol

IV. m-chlorophenol

• III < II < I < IV

• II < IV < III < I

• II < III < IV < I

• II < III < I < IV

Which of the following functional groups, cannot be reduced to alcohol using NaBH₄ in ethanolic solution ?

• R - O - R

• RCOCl

• R - COOH

• R - CHO