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$2 N a Z + H_{2} S O_{4} (c o n c .) \overset{}{\to} N a_{2} S O_{4} + 2 H Z .$ Z cannot be

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Correct option is D

2NaI+H2SO4(conc.)→ 2HI+Na2SO42HI+H2SO4(conc.)→ I2+2H2O+SO2Conc. H2SO4 oxidizes HI to I2

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2NaZ+H2SO4(conc.)→ Na2SO4+2HZ. Z cannot be

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$2 N a Z + H_{2} S O_{4} (c o n c .) \overset{}{\to} N a_{2} S O_{4} + 2 H Z .$ Z cannot be