Answer:
(i) Put the red litmus paper turn by turn
in each of the three test tubes. The solution which turns the red litmus paper
to blue will be a basic solution. The blue litmus paper formed can now be used
to test the acidic solution.
(ii) Put this blue litmus paper in the
remaining two test tubes, one by one. The solution which turns the blue litmus
paper to red will be the acidic solution.
(iii) The solution which has no
effect on any litmus paper will be neutral and hence, it will be distilled
water.
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