Which of the following has lowest boiling point? from Chemistry

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 Multiple Choice QuestionsMultiple Choice Questions

481.

Phenol is bifunctional compound because

  • It is acidic and contain -OH

  • It reacts with Na to give phenoxide

  • It reacts with both Na and Zn to give phenoxide and benzene respectively

  • Both (a) and (c)


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482.

Which of the following has lowest boiling point?

  • p -nitrophenol

  • m -nitrophenol

  • o-nitrophenol

  • Phenol


C.

o-nitrophenol

Ortho nitophenol shows intramolecular hydrogen bonding, Whereas para nitro phenol shows inter moleculr hydrogen bonding. In intermolecular hydrogen bonding association of molecules take place, but in intramolecular hydrogen bonding there is no such type of association between the molecules. Due to this reason para nitrophenol has higher boiling point than ortho nitro phenol.


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483.

One mole of an organic compound A with the formula C3H8O reacts completely with two moles of HI to form X and Y. When Y is boiled with aqueous alkali, it forms Z . Z answers the iodoform test. The compound A is

  • propan -2- ol

  • propan - 1- ol

  • ethoxyethane

  • methoxyethane


484.

What are the organic products formed in the following reaction?

C6H5-COO-CH3 (ii)H2O(i) LiAlH4

  • C6H5-COOH and CH4

  • C6H5-CH2-OH and CH4

  • C6H5-CH3 and CH3-OH

  • C6H5-CH2-OH and CH3-OH


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485.

The main product (P) is

  • C6H5OC2H5

  • C2H5OC2H5

  • C6H5OC6H5

  • C6H5.I


486.

Which of the following compound (s) will give butanone on oxidation with alkaline KMnO4 solution?

  • Butan-1-ol

  • Butan-2-ol

  • Both (a) and (b)

  • None of the above


487.

The order of reactivity of the following alcohols is

  • 1 > 2 > 3 > 4

  • 1 > 3 > 2 > 4

  • 4 > 3 > 2 > 1

  • 4 > 3 > 1 > 2


488.

The final product (IV) in the sequence of reactions

  • CH3-(CH3)CHOCH2CH2OH

  • CH3-(CH3)CHCH2CH2Br

  • CH3-CH(CH3)-CH2CH2OH

  • CH3-CH(CH3)OCH3CH2


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489.

Ph-CC-CH3 Hg2+/H+ A,


490.

What will be the order of reactivity of the following carbonyl compounds with Grignard's reagent?

                              

  • I > II > III >IV

  • IV> III > II >I

  • II> I> IV >III

  • III> II> I >IV


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