Question

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Answer 1

Answer:

ans.1 when water is present the paper colour goes blue to pink.

ans.2 the glass slides placed over the dry cobalt chloride paper to keep a strip of cobalt chloride. paper at their place

Answer 2

1. The colour of dry cobalt chloride paper is blue.

2. The glass slides placed over the dry cobalt chloride paper to keep the strip of cobalt chloride paper at their place.

3. The cobalt chloride paper will change it's colour from blue to pink.

4. It happens because the leaf will leave water, which is called transpiration.

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