Question

Which of the following is(are) true?

• A. Bleaching agents undergoes oxidation and oxidises stain molecules to less coloured forms of the molecule.
• B. Breathalyzer is the device used to detect presence ethanol in the breath is based on concept of redox.
• C. Photographic film is made of AgBr grains in a gel spread.
• D. Both b and c

Answer 1

The correct option is D Both b and c

Correct facts are:

• Bleaching agents undergoes reduction and oxidises stain molecules to less coloured forms of the molecule.

• In Breathalyzer the oxidising agents present in the device oxidised the ethanol present in the breath, hence it is based on concept of redox.

• Photographic film is made of AgBr grains in a gel spread.