Which of the following statements about ...

Which of the following statements about primary amines is false ? .

Alky1 amines are stronger bases than ammonia .

Alky1 amines are stronger bases than ary1 amines.

Alky1 amines react with nitrous aci to produce alcohols .

Ary1 amines react with nitrous acid to produce phenols .

Text Solution

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The correct Answer is:

Aromatic primary amines react with nitrous acid at low temperatures `(273-278K)` to form diazonium salts
`ArNH_(2)+naNO_(2)+2HXoverset(Cold)rarrAr-N-=overset(+)N:X^(bar)+NaX+2H_(2)O`
Secondary aromatic amines react with nitrous acid to yield N-nitrosoamines
`ArNHR+NaNO_(2)+HXrarrAr-overset(R)overset(R)N-N =O+NaX+H_(2)O`
Tertiary aromatic amines undergo ring substitution on reaction with nitrous acid

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Which of the following statement about primary amine is false :

Aryl amines react with nitrous acid to produce phenol

Alkylamines are stronger base than ammonia

Alkyl amines are stringer base than aryl amines

Alkyl amines react with nitrous acid to produce alcohol

Which of the following statements about mutations is false?

Mutations are the source of new alleles for genes.

Organisms are able to create mutations to meet their specific needs.

Mutations are random events and can happen in any cell at any time.

Most mutations tend to be harmful or have no effect on organisms.

Which of the following statements about amino acids is false

Based on the nature of carboxyl group there are many amino acids

Amino acids are substituted methanes

Amino acids have an amino group and acid group as substituents on the `alpha`-carbon

There are four substituent groups occupying the four valency positions