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 ethanol is prepared on industrial scale in the world?

  • Ans 1: Ethanol is prepared on industrial scale world over by the process of fermentation.Fermentation is a biochemical process which occurs in the presence of certain enzymes secreted by microorganism such as yeast.Optimum temperature for this process of fermentation is 25-35 degree.
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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 ethanol is prepared on industrial scale in the world?

  • Ans 1: Ethanol is prepared on industrial scale world over by the process of fermentation.Fermentation is a biochemical process which occurs in the presence of certain enzymes secreted by microorganism such as yeast.Optimum temperature for this process of fermentation is 25-35 degree.
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12th Class Chemistry Chapter 11 Short Questions Preparation - Set 2

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 3

Question # 1

Ethers are less reactive than alcohols.Justify

  • Ans 1: Ethers are comparatively inert substance.The reagents like ammonia,alkalies,dilute acids and metallic sodium have no action no ethers on cold state .Moreover they are not oxidized or reduced easily.
    On the other hand alcohols can react with reagents due to C-O and O-H bonds.These can be oxidized and reduced ,Alcohols also undergo dehydration reaction.
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12th Class Chemistry Chapter 11 Short Questions Preparation - Set 4

Question # 1

Prepare diethyl ether by Williamson synthesis?

  • Ans 1: Alcohols are reacted with metallic sodium from alkoxides. This alkaloides ion is a strong nucleophile and readily reacts with alkyl halide to produce an ether.
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12th Class Chemistry Chapter 11 Preparation

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