Which of the following statements are correct for `SO_(2)` gas ?

Options

A. It acts as bleaching agent in moist conditions.
B. Its molecule has linear geometry.
C. It can be prepared by the reaction of dilute `H_(2)SO_(4)` with metal sulphide.
D. All of the above.

Answer

A

Explanation

`SO_(2)` acts as a bleaching agent under moist conditions.
`SO_(2)(g)+2H_(2)OrarrH_(2)SO_(4)+2[H]`
`SO_(4)` is oxidized to sulphuric acid and releases nascent hydrogen which bleaches the material. But this is a temporary as atmospheric oxygen reoxides the bleached matter after some time.