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251.
Complete the following reactions:
$straight C subscript 6 straight H subscript 5 straight N subscript 2 Cl space rightwards arrow from left parenthesis ii right parenthesis thin space NaNO divided by Cu space increment to left parenthesis straight i right parenthesis thin space HBF subscript 4 of$

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252. An aromatic compound A on treatment with aqueous ammonia and heating forms compound ‘B’ on heating with Br₂ and KOH forms a compound ‘C’ of molecular formula C₆H₇N. Write the structures and IUPAC names of compound A B and C.

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253.

Why cannot aromatic primary amines be prepared by Gabriel pthalimide synthesis?

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254. Write the reactions of (i) aromatic, (ii) aliphatic primary amines with nitrous acid.

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255.

Give plausible explanation for each of the following:
Why are amines less acidic than alcohols of comparable molecular masses?

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256.

Give plausible explanation for each of the following:
Why are primary amines higher boiling than tertiary amines?

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257.

Give plausible explanation for each of the following:
Why are aliphatic amines stronger bases than aromatic amines?

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258.

Complete and balance each of the following equations:
$straight C subscript 6 straight H subscript 5 NO subscript 2 plus SN plus HCl space rightwards arrow$