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Q.

The colour shown by a neutral substance on a pH scale is _______.


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a

Red

b

Green

c

Blue

d

yellow 

answer is B.

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Detailed Solution

●        The pH scale in chemistry defines the acidity or basicity of the aqueous solution. The acidic solution tends to have lower pH and the basic solution has higher pH. The range of  pH scale is 0 - 14.
●        The pH of less than 3 is defined as strong acid. The pH of 3 - 6 shows weak acid. The PH from 8 - 14 is for weak alkalis and shows a blue colour. Neutral solutions have a pH of 7 that shows green colour.
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