12th Class Fsc Part 2 Short Questions Online Preparation for Chemistry chapter 11(Alcohols Phenols and Ethers)

Online Short Questions For Chapter 11 "12th Class Chemistry Chapter 11 Short Questions Preparation "

Try The Short Questions For 12th Class Chemistry Chapter 11 Short Questions Preparation

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Chemistry - 12th Class Chemistry Chapter 11 Short Questions Preparation

Question # 1

Why phenol is acidic while alcohol is not?

  • Ans 1: Phenol is much more acidic than alcohols but less acidic than carboxylic acids,Phenoxide formed by the dissociation of phenol.The negative charge on oxygen atom can become involved with the pie electron cloud on the benzene ring,The negative charge is thus delocalized in the ring and the phenoxide ion becomes relatively stable this type of delocalization is not possible in alcohol.
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Prepare Complete Set Wise Questions For Chapter 11 "12th Class Chemistry Chapter 11 Short Questions Preparation "

12th Class Chemistry Chapter 11 Short Questions Preparation - Set 1

Question # 1

Why phenol is acidic while alcohol is not?

  • Ans 1: Phenol is much more acidic than alcohols but less acidic than carboxylic acids,Phenoxide formed by the dissociation of phenol.The negative charge on oxygen atom can become involved with the pie electron cloud on the benzene ring,The negative charge is thus delocalized in the ring and the phenoxide ion becomes relatively stable this type of delocalization is not possible in alcohol.
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12th Class Chemistry Chapter 11 Short Questions Preparation - Set 2

Question # 1

How to convert phenol to an alcohol?

  • Ans 1: When hydrogen is passed through phenol at 150C in the presence of Ni catalyst ,It gives cyclogexanol which is an alcohol.
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12th Class Chemistry Chapter 11 Short Questions Preparation - Set 3

Question # 1

Explain acidic behavior of phenol.

  • Ans 1: Phenoxide ion is formed by the dissociation of phenol,The negative charge on oxygen atom can become involved with the pie electron cloud on the benzene ring,The negative charge is thus delocalizes in the ring and the phenoxide ion becomes relatively stable.
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12th Class Chemistry Chapter 11 Short Questions Preparation - Set 4

Question # 1

Give chemical reaction for preparation of Bakelite?

  • Ans 1: Phenol reacts with formaldehyde in the presence of acid or alkali to give hydrooxyl benzyl alcohol which on further reaction with other phenol molecules yields a polymer called Bakelite.
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12th Class Chemistry Chapter 11 Preparation

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