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 "

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Chemistry - 12th Class Chemistry Chapter 11 Short Questions Preparation

Question # 1

How secondary and tertiary alcohols can be distinguished by Lucas Test?

  • Ans 1: Secondary and tertiary alcohols are identified and distinguished by reacting them with con.HCI in an hydrous ZnCI2,An oily layer of alkyl halides separates out on these reactions.
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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

How secondary and tertiary alcohols can be distinguished by Lucas Test?

  • Ans 1: Secondary and tertiary alcohols are identified and distinguished by reacting them with con.HCI in an hydrous ZnCI2,An oily layer of alkyl halides separates out on these reactions.
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12th Class Chemistry Chapter 11 Short Questions Preparation - Set 2

Question # 1

Describe the method for preparation of phenol from sodium salt of benzene?

  • Ans 1: Sodium salt of benzene sulphonic acid reacts with NaOh at 320 Degree to give sodium phenoxide which on treatment with HCI give phenol.
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12th Class Chemistry Chapter 11 Short Questions Preparation - Set 3

Question # 1

Explain denaturing of alcohol?

  • Ans 1: Ethanol is denatured by addition of 10% methanol to avoid its use for drinking purposes,Such as alcohol is called methylated spirit.A small quantity of pyrimidine or acetone may also be added for this purposes.
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12th Class Chemistry Chapter 11 Short Questions Preparation - Set 4

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 Preparation

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