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Question

Which of the following would be indicators that can be used to observe transpiration occurring in a leaf?


A

Litmus paper

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B

Dry cobalt chloride paper

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C

pH paper

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D

Bathophenanthroline Indicator Paper

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Solution

The correct option is B

Dry cobalt chloride paper


Cobalt chloride paper is used to test the presence of water through transpiration. When water is present, the colour of the cobalt chloride paper changes from blue to pink.


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