Study the following statements.
I) Blue litmus turns red in basic medium.
II) Red litmus turns blue in acidic medium.
III) Both blue and red litmus show no change in colour in neutral medium
IV) When an acid is mixed with a base, the resulting solution shows no change of colour with litmus.
Which of the following is true ?

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II and IV are correct

Both III and IV are correct

I is correct

Only III is correct

answer is C.

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Detailed Solution

In neutral medium, there is no effect on either blue litmus or red litmus. When we mix both acid and base the resulting solution may be neutral as we can expect the formation of salt and water.

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