what is the advantage of universal indicator over litmus solution?
Universal indicator can give u the exact magnitude of the acidity or bascity of a substance.
a limus will only tell u whether or not the substance is acidic or basic .
Universal indicator will give you an indication of how acidic or alkaline a solution is, depending on the exact color. Litmus can only turn red or blue and can't distinguish between differing amounts of acid or base.