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Q.

Hot conc. H2SO4 acts as moderately strong oxidising agent. It oxidises both metals and non-metals, Which of the following element is oxidised by conc. H2SO4 into two gaseous products?

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a

Cu

b

Zn  

c

S

d

C

answer is C.

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Detailed Solution

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H2SO4 is a moderately strong oxidising agent which oxidises both metals and non-metals as shown below

Cu+2H2SO4(conc)CuSO4+SO2+2H2O

S+2H2SO4(conc)3SO2+2H2O

While carbon on oxidation with H2SO4 produces two types of oxides CO2 and SO2

C+2H2SO4(conc)CO2+2SO2+2H2O

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