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A student prepared solutions of (i) an a...

A student prepared solutions of (i) an acid and (ii) a base in two separate beakers. She forgot to label the solutions and litmus paper is not available in the laboratory. Since both the solutions are colourless how will she distinguish between the two ?

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As both the solutions are colourless and student is in laboratory, she can use chemical indicator like phenolphthalein or natural indicators like turmeric, china rose, etc., to distinguish between the two.
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