The one which is least basic is from Chemistry Amines

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 Multiple Choice QuestionsMultiple Choice Questions

41.

Which one of the following will be most basic?

  • Aniline

  • p-methoxyaniline

  • p-methyl aniline

  • Benzylamine


42.

Nitrobenzene can be converted into azobenzene by reduction with

  • Zn, NH4Cl, 

  • Zn/NaOH, CH3OH

  • Zn/NaOH

  • LiAlH4, ether


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43.

The one which is least basic is

  • NH3

  • C6H5NH2

  • (C6H5)3N

  • (C6H5)2NH


C.

(C6H5)3N

Presence of electron withdrawing group like Ph group decreases the electron density of nitrogen and hence, the lone pair of nitrogen are not available for donation. Thus, (C6H5)3N is least basic because of the presence of three electron withdrawing Ph(C6H5) groups.


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44.

Which of the following converts CH3CONH2 to CH3NH2?

  • NaBr

  • NaOBr

  • Br2

  • None of the above


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45.

The reaction, ROH + H2CN2 in the presence of HBF4, gives the following product

  • ROCH3

  • RCH2OH

  • ROHCN2N2

  • RCH2CH3


46.

In Gattermann reaction, a diazonium group is replaced by X using Y.X and Y are

  • X Y
    Cl Cu/HCl
  • X Y
    Cl CuCl2/HCl
  • X Y
    Cl CuCl2/HCl
  • X Y
    Cl2 Cu2O/HCl

47.

How many tripeptides can be prepared by linking the amino acids glycine, alanine and phenyl alanine?

  • One

  • Three

  • Six

  • Twelve


48.

Consider the following reaction,

C2H5HCl + AgCN EtOH/H2O X (major)

Which one of the following statements is true for X ?

(I) It gives propionic acid on hydrolysis
(II) It has an ester functional group
(III) It has a nitrogen linked to ethyl carbon
(IV) It has a cyanide group

  • IV

  • III

  • II

  • I


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49.

When acetamide is hydrolysed by boiling with acid, the product obtained is

  • acetic acid

  • ethyl amine

  • ethanol

  • acetamide


50.

Which will not go for diazotisation?

  • C6H5NH2

  • C6H5CH2NH2


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