When an article is bleached by SO2, the colour can be restored by

Question

When an article is bleached by SO2, the colour can be restored by (A) drying (B) heating (C) exposure to air (D) cannot be restored by any of these methods

Tardigrade Admin · Accepted Answer

Correct answer is (c) exposure to air

Q. When an article is bleached by SO2​, the colour can be restored by

drying

heating

exposure to air

cannot be restored by any of these methods

Correct answer is (c) exposure to air

Q. When an article is bleached by $S O_{2}$ , the colour can be restored by