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 Multiple Choice QuestionsMultiple Choice Questions

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261.

The step which never be involved in the dehydration of alcohol is

  • protonation

  • elimination

  • hydride transfer

  • carbanion formation


262.

The boiling point of ethanol is higher as compared to the boiling point of diethyl ether though both have the same molecular formula. This is due to

  • resonance

  • -R group

  • H-bonding

  • covalent bonding


263.

Which one of the following compounds will not react with CH3MgBr ?

  • Ethyl acetate

  • Acetone

  • Dimethyl ether 

  • Ethanol


264.

Dehydration of alcohol usually goes by

  • E1 mechanism

  • E2 mechanism

  • E1 cb mechanism

  • SN2 mechanism


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265.

Phenol reacts with dilute nitric acid at normal temperature to form

  • o-nitrophenol

  • m-nitrophenol

  • o-and p-nitropheno

  • 2, 4, 6-trinitrophenol


266.

Which of the following compounds does not give Friedel-Craft's reaction ?

  • benzene

  • xylene

  • nitrobenzene

  • phenol


267.

Which one is the correct IUPAC name of the following compound?

   

  • 1-chloro-5-hydroxycydohexane

  • 2-chloro-4-hydroxycyclohexane

  • 3-chloro-3-cyclohexenol

  • 5-hydroxycydohexenyl chloride


268.

Which of the following represents the correct decreasing order of acidity of the following compounds?

    

  • ii > i > iii > iv

  • iv > iii > ii > i

  • iii > iv > i > ii

  • iv > iii > i > ii


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269.

How much ethyl alcohol C2H5OH, must be added to 1.00 L of water so that the solution will not freeze at - 4°F?

  • 211 gm

  • 495 gm

  • 85 gm

  • 46 gm


270.

What will be the major product when 2-amino propane is treated with nitrous acid?

  • Propane-2-ol

  • Cyclopropene

  • Propanol

  • 2-rntropropane


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