Alcohol Phenol And Ethers

This is a assertion and reason answer type question as classified in NCERT Exemplar

(i) Assertion and reason both are correct and reason is correct explanation of assertion.

Explanation:  P-nitrophenol is more acidic as nitro group helps in the stabilization of the phenoxide ion by dispersal of negative charge due to resonance.

This is a assertion and reason answer type question as classified in NCERT Exemplar

(ii) Assertion and reason both are wrong statements.

Correct assertion: Addition reaction of water to but-1-ene in acidic medium yields butan-2-o1.

Correct reason: Addition of water in acidic medium proceeds through the formation of secondary carbocation.

This is a matching answer type question as classified in NCERT Exemplar

(i)- (d);    (ii)- (a);     (iii)- (f);     (iv)- (e);    (v)- (c);     (vi)- (b)

This is a matching answer type question as classified in NCERT Exemplar

(i)- (e) ;    (ii)- (f) ;     (iii)- (d) ;    (iv)- (c);     (v)- (a);     (vi)- (b)

This is a matching answer type question as classified in NCERT Exemplar

  (i)- (d)     (ii)- (e);     (iii)- (b);     (iv)- (a)

This is a matching answer type question as classified in NCERT Exemplar

(i)- (d);    (ii)- (c);  (iii)- (f);  (iv)- (a); (v)- (g);  (vi)- (b)

This is a multiple choice answer as classified in NCERT Exemplar

II. C₆H₅—CH₂—OH

III. C₆H₅—CH—OH

              |

             CH₃

Benzylic alcohol are those alcohols which have phenyl group attached to the alpha  carbon  of alcohol.

R—CαH₂—OH                   :     Benzylic Alcohol

The compound II and III have phenyl group attached at the Cα of the alcohol and thence they are benzylic alcohols

This is a multiple choice answer as classified in NCERT Exemplar

I. Br₂/water 

III. Neutral FeCl₃ 

Phenol does not give the bromine water (Br₂/water ) test whereas ethanol gives the bromine water.

Phenol on reaction with neutral FeCl₃ forms a colored complex with Fe₃⁺ ion whereas ethanol does not form the colored complex with neutral FeCl₃.

This is a multiple choice answer as classified in NCERT Exemplar

I. CrO₃ in anhydrous medium. 

II. Pyridinium chlorochromate. 

III.  Heat in the presence of Cu at 573K. 

KMnO₄ is a strong oxidising agent and oxidises the primary alcohol to ketone. Hence cannot be used as a reagent to oxidise primary alcohols to aldehydes.