Question

Time required for cobalt chloride paper to turn pink when placed just above water surface is called

• A. Evaporation time
• B. Water test time
• C. Cobalt chloride test time
• D. Leaf test time

Answer 1

The correct option is B Water test time

Cobalt chloride paper is used to detect for the presence of water. In presence of water, blue cobalt chloride paper turns pink. Hence, it is called as test for water. During this test, cobalt chloride paper is taken and is placed above the water surface. After few minutes, cobalt chloride paper turns pink. Time required for cobalt chloride paper to turn pink is called as water test time.

Thus, the correct answer is option B.