Q.

Sulphur on reaction with concentrated HNO3. gives (A) which reacts with NaOH gives (B). (A) and (B) are

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a

H2SO3, Na2S2O2

b

NO2,Na2S

c

H2SO4,Na2SO4

d

H2S2O3,Na2S2O3

answer is C.

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Detailed Solution

S+HNO3⟶(A)  conc. (A)+NaOH⟶(B)S+6HNO3⟶H2SO4+6NO2+2H2O(A)H2SO4+2NaOH⟶Na2SO4+2H2O (A)
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Sulphur on reaction with concentrated HNO3. gives (A) which reacts with NaOH gives (B). (A) and (B) are