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Q.

Which of the following statements are correct ?
i) The activating effect of – NHCOCH3 is more than that of – NH2 group 
ii) N-ethylbenzene sulphonamide is soluble in alkaline solution
iii) Aniline on reaction with concentrated H2SO4 followed by heating to 453-473K with concentrated H2SO4 gives p-aminobenzene sulphonic acid
iv) Alkyl isocyanide on reaction with HgO gives alkyl isocyanate

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a

i, ii, iv

b

iii, iv

c

ii, iii

d

ii, iii, iv

answer is C.

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Detailed Solution

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Ethylbenzene sulphonamide is soluble in alkali because it has acidic hydrogen.

solution

CH3NC + HgO ----->CH3N=C=O  (majorproduct)

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Which of the following statements are correct ?i) The activating effect of – NHCOCH3 is more than that of – NH2 group ii) N-ethylbenzene sulphonamide is soluble in alkaline solutioniii) Aniline on reaction with concentrated H2SO4 followed by heating to 453-473K with concentrated H2SO4 gives p-aminobenzene sulphonic acidiv) Alkyl isocyanide on reaction with HgO gives alkyl isocyanate