Question

Moist cobalt chloride paper turns Blue in colour.

• A. True
• B. False

Answer 1

The correct option is B False

Moist cobalt chloride paper turns Pink in color:

1. Anhydrous Cobalt chloride is Blue. When it absorbs water it turns Pink.
2. To check the rate of transpiration on the upper and lower surfaces of the leaf, a blue-colored Cobalt chloride paper is fixed over the surfaces.
3. The blue cobalt chloride paper at the lower surface of the leaf turns pink rapidly due to the water content released during transpiration.
4. While the cobalt chloride paper at the upper surface of the leaf takes time to turn pink due to a slower rate of transpiration.

Final answer: The given statement is False.