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 Multiple Choice QuestionsMultiple Choice Questions

151.

Assertion: o-Nitrophenol is more volatile than p-nitrophenol.

Reason : Intramolecular hydrogen bonding is present in o-nitrophenol while intermolecular H - bonding is in p-nitrophenol.

  • If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

  • If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

  • If Assertion is true but Reason is false.

  • If Assertion is false but Reason is true.


152.

Assertion: Phenol is a weaker acid than ethanol.
Reason: Groups with +M effect and -I effect decrease acidity at m-position.

  • If both assertion and reason are true and reason is a correct explanation of the assertion.

  • If both the assertion and reason are true but the reason is not a correct explanation of the assertion.

  • If the assertion is true but the reason is false.

  • If both the assertion and reason are false.


153.

Assertion: Ethers behave as bases in the presence of mineral acids.

Reason: It is due to the presence of a lone pair of electrons on the oxygen.

  • If both assertion and reason are true and the reason is a correct explanation of the assertion.

  • If both the assertion and reason are true but the reason is not a correct explanation of the assertion.

  • If the assertion is true but the reason is false.

  • If both the assertion and reason are false.


154.

Which one of the following properties are exhibited by phenol?

  • It is soluble in aq. NaOH and evolves CO2 with aq. NaHCO3

  • It is soluble in aq. NaOH and does not evolve CO2 withe aq. NaHCO3

  • It is not soluble in aq. NaOH but evolves CO2 with aq. NaHCO3

  • It is insoluble in aq. NaOH and does not evolve CO2 with aq. NaHCO3


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155.

The intermediate J in the following Wittig reaction is


156.

When phenol is treated with D2SO4 /D2O, some of the hydrogens get exchanged. The final product in this exchange reaction is


157.

The correct order of decreasing acidity of nitrophenols will be:

  • m-nitrophenol > p-nitrophenol > o-nitrophenol

  • o-nitrophenol > m-nitrophenol > p-nitrophenol

  • p-nitrophenol > m-nitrophenol > o-nitrophenol

  • p-nitrophenol > o-nitrophenol > m-nitrophenol 


158.

Among the following ethers, which one will produce methyl alcohol on treatment with hot concentrated HI?

  • CH3-CH2-CH2-CH2-O-CH3

  • CH3-CH2-CH|CH3-O-CH3

  • CH3-C(C3H6)-O-CH3

  • CH3-CH|CH3-CH2-O-CH3


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159.

PCl5 C2H5Cl, Y PCl5 CH3COCl

X and Y are

  • (C2H5)2O and CH3CO2H

  • C2H5I and C2H5CHO

  • C2H5OH and CH3CO2H

  • C2H5OH and C2H5CHO


 Multiple Choice QuestionsShort Answer Type

160.

Both phenol and alcohol contains -OH group. But still phenol is more acidic than alcohol. Explain why?


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