LABORATORY REVIEW
TRANSPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To change colour when exposed to sand
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To indicate moisture
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To change colour according to the acidity or basicity of substance .
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Detailed explanation-1: -Cobalt chloride paper is an indicator of moisture. It is blue in colour when dry and pink coloured when moist.
Detailed explanation-2: -Cobalt chloride paper is an indicator of moisture. When it’s dry, the colour of the paper is blue. When it’s exposed to moisture, the colour of the paper is pink.
Detailed explanation-3: -Hint: Cobalt chloride paper is used to test for the presence of water which may be leaking through tiny cracks carrying water. In presence of the cobalt chloride forms the hexahydrate compound which is pink in colour.
Detailed explanation-4: -As humidity increases, cobalt chloride gradually changes color from blue, to pink, to a lighter pink, almost white. The change in color is dramatic, and it makes this compound an excellent indicator of humidity.