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Question: An element X burns in air to form corresponding dioxide A. On bubbling hydrogen through molten state...

An element X burns in air to form corresponding dioxide A. On bubbling hydrogen through molten state of X, a gaseous hybride B is formed. A and B react to give back X. A and B are respectively -

A

H2S, SO2

B

SO3, SO2

C

SO2, H2S

D

CO2, CH4

Answer

SO2, H2S

Explanation

Solution

Element X is S.

S + O2 →Δ\xrightarrow { \Delta } SO2(A)\underset{(A)}{SO_{2}}

S + H2 →Δ\xrightarrow { \Delta } H2S(B)\underset{(B)}{H_{2}S}