Question

What is the characteristic feature of the cobalt chloride paper used in the transpiration experiment?

• A. Paper turns pink in the presence of water.
• B. Paper turns blue in the presence of water.
• C. Paper turns pink in the presence of carbon dioxide.
• D. Paper turns blue in the presence of oxygen.

Answer 1

The correct option is A

Paper turns pink in the presence of water.

Plants transpire in the form of water vapour. So when the dry and blue cobalt chloride paper is placed in the transpiration chamber it turns pink when it comes in contact with water.