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Alcohols, Phenols and Ethers

Short Answer Type

71. Arrange the following compounds in increasing order of boiling point and account for the order:
(a) 1-pentanol, (b) 2-methyl-2-butanol, (c) 3-methyl-butanol-2.

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72.

Why is ethanol less acidic than water?

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73.

Compare the acidity of Cl—CH₂ CH₂OH and CH₃CH₂OH. Explain.

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74.

Arrange the following in order of decreasing basic strength:
(CH₃)₃(CO^–, CH₃O^–, (CH₃)₂CHO^–

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75.

Compare and explain the relative Bronsted basicities of 1°, 2° and 3° alcohols in the liquid state.

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76.

Give one example of a reaction to show that alcohol acts as a Bronsted base.

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77.

What happens when ethanol reacts with Na metal? Name the products formed.

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78.

Arrange the following alcohols in order of increasing reactivity towards Na metal:

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79.
Explain why sodium (Na) may be used to remove the last trates of H₂O from benzene but not from ethanol?

Ethanol has an acidic hydrogen and reacts with Na and give sodium ethoxide ion, whereas benzene has not any acidic hydrogen thus it does not react with benzene, thus when it react with benzene sodium react with water forming sodium hydroxide along with hydrogen. Hence used to remove the last trates of water.