Which of the following compound (s) will give butanone on oxidati

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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)


482.

Which of the following has lowest boiling point?

  • p -nitrophenol

  • m -nitrophenol

  • o-nitrophenol

  • Phenol


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


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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


B.

Butan-2-ol

Alkaline KMnO4 is a strong oxidising agent. It oxidises primary alcohols to aldehyde and secondary alochols to ketones.

(i) CH3CH2CH2CH2(1°)-OH KMnO4 (alkl.)[O] CH3CH2CH2CH3Butanol

(ii) CH3CH2(2°)CH|OHCH3 KMnO4(alk.)[O] CH3CH2C||OCH3Butanone


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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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