Chemistry : Alcohols, Phenols and Ethers

P $\underset{\left(\mathrm{ii}\right) {\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{\left(\mathrm{i}\right) {\mathrm{CH}}_3\mathrm{MgBr}}{\to }} \mathrm{R} \underset{∆}{\overset{\left(\mathrm{i}\right) \mathrm{dil}. \mathrm{NaOH}}{\to }}$

4-methylpent-3-en-2-one P is

• propanone

• ethanamine

• ethanenitrile

• ethanal

When CH₂=CH-O-CH₂-CH₃ reacts with one mole of HI, one of the products formed is

• ethane

• ethanol

• iodoethene

• ethanal

0.44 g of a monohydric alcohol when added to methylmagnesium iodide in ether liberates at STP, 112 cm³ of methane. With PCC the same alcohol forms a carbonyl compound that answers silver mirror test. The monohydric alcohol is

• H₃C-CH(OH)-CH₂-CH₃

• (CH₃)₃C-CH₂OH

• H₃C-CH(OH)-CH₂-CH₂-CH₃

• (CH₃)₂CH-CH₂OH

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