Question

based on which of the following changes is an indicator useful?
(a) colour
(b) physical state
(c) temperature
(d) pressure
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Answer 1

Answer:

Indicator is useful on the basis of colour...

Answer 2

(a) colour is a useful parameter in terms of indicator.

Explanation:

• Colour is used in case of a solution to demarcate the differences in the chemical process, as in case of Litmus test.  
• Since colour can capture the change in a solution easily it is employed as a common indicator in all the processes.  
• The physical state can be only measured and temperature can only be captured using a thermometer. Colour is useless in these two cases.

To learn more:

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