Question

Sulphur dioxide bleaches colouring matter by

Solution

Correct option is

Reduction

It is the due to reduction of SO2 to S which produces bleaching effect.

SIMILAR QUESTIONS

Q1

The number S – S bonds in sulphur trioxide trimer, (S3O9) is: 

Q2

Which is the most thermodynamically stable allotropic form of phosphorus?

Q3

Which acid will you use to dissolve lead (II) oxide?

Q4

Which of the following is not hydrolysed?

Q5

When Sn is treated with conc. HNO3

Q6

Which of the following is highly acidic than others?

Q7

Which of the following halogen has highest bond dissociation energy?

Q8

One mole of calcium phosphide on reaction with excess water gives:

Q9

KF combines with HF to form KHF2. The compound contains the species: 

Q10

Chlorine acts as a bleaching agent only in presence of: