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 Multiple Choice QuestionsMultiple Choice Questions

71.

Predict the product Bin the given reaction:


72.

CH3CH2CCH R butanone-2. R is

  • Hg++/ dil.H2SO4

  • KMnO4

  • KClO3

  • K2Cr2O7


73.

Identify the correct decreasing order of acidity of the given carboxylic acid.                               


74.

In the reaction

HCL+O+CH3MgI   A  H2O  B+Mg(OH) I

What are A and B?

  • CH3O MgI and CH3-OH

  • CH3CH2 OMg I and C2H5-O-C2H5

  • CH3CH2O Mg I and CH3-CH2-OH

  • CH3-CH2-I and CH3-CH2-OH


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75.

In the given reaction,

CH3-CH2-CH2-O-CH2-CH3coldHCl [X]+[Y]

[X]+[Y] are respectively.

  • CH3-CH2-CH2OH and CH3-CH2-Cl

  • CH3-CH2-CH2-Cl and CH2-CH2-OH

  • CH3-CH2-CH2-Cl and CH2=CH2

  • CH3-CH3=CH2 and CH2=CH2


76.

Predict the following product

(X) Cinnanaic acid is


77.

During reduction of carbonyl compounds by hydrazine and KOH, the first intermediate formed is:

  • RC≡N

  • RCONH2

  • RCH≡N

  • RCH=NH2


78.

o-toluic acid on reaction with Br2 + Fe gives:


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79.

Which one of the following reactions cannot be used for the reduction of:

  • HI and red phosphorus at 200C

  • Wolff-Kishner reduction

  • Clemmensen reduction

  • Wurtz reaction


D.

Wurtz reaction

Wurtz reaction is the condensation of alkyl halides with metallic sodium in the presence of dry ether to form higher hydrocarbons. Carbonyl compounds (aldehyde and ketones) can be converted into hydrocarbon by means of heating with HI and red P at about 200°C , Clemmensen reduction (Zn + Hg / HCl) and Wolff Kishner reduction (NH2NH2 /OH).


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80.

Vinegar contains

  • 100% acetic acid

  • 10- 20% acetic acid

  • 7 - 8% acetic acid

  • 1% acetic acid


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