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(a) Define a universal indicator . Menti...

(a) Define a universal indicator . Mention its one use.
(b) Solution A gives pink colour when a drop of phenolphthalein indicator is added to it. Solution B gives red colour when a drop of methyl orange is added to it. What type of solutions are A and B which one of the solutions A and B will have a higher pH value ?
(c) Name one salt whose solutions has pH more than 7 and one salt whose solution has pH less than 7.

Text Solution

Verified by Experts

Solution A is basic , i.e ., `pHgt7` .
Solution B is acidic . i.e., `pHlt7`.
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