A solid nonmetal X on burning gives a compound Y which under high temperature and pressure conditions in presence of catalyst gets oxidised to Z. Z can give the ic acid of the nonmetal on dissolution in water. However, it is not a preferred reaction for the preparation ofthe acid. Give reason and explain the method employed for the preparation of the it: acid from Z and mention the precautions required during dilution of the acid.

A solid nonmetal X on burning gives a compound Y which under high temp

1.	A solid nonmetal X on burning gives a compound Y which under high temperature and pressure conditions in presence of catalyst gets oxidised to Z. Z can give the ic acid of the nonmetal on dissolution in water. However, it is not a preferred reaction for the preparation ofthe acid. Give reason and explain the method employed for the preparation of the it: acid from Z and mention the precautions required during dilution of the acid.
Answer» Solution :`S+O_2rarr SO_(2)` `X""Y` `2SO_4+O_2("High pressure and temp ")/(V_2O_5)2SO_3` `Y""Z` `SO_3+H_2O rarr H_2 SO_4` However , in the PREPARATION of `H_2SO_4` the above reaction is not preferred since it is highly exothemic and leads to EXPLOSION .Instead, `SO_3` is DISSOLVED in `H_2SO_4` to give oleum which on dilution with give oleum which on dilution with water gives `H_2SO_4` `SO_3+H_2SO_4rarr H_2S_2O_7` Oleum `H_2S_2O_7+H_2Orarr2H_2SO_4` Dilution of `H_2SO_4` is shold not be diluted by adding water to the acid .Instead , water is taken and `H_2SO_4` is ADDED slowly by stirring dilution process.