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Q.

CO32− and HCO3−  can be distinguished by :

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a

BaCl2 solution

b

phenolphthalein

c

All of these

d

HgCl2  solution

answer is A.

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Detailed Solution

It is possible to differentiate between sodium carbonate and sodium bicarbonate aqueous solutions using the phenolphthalein indicator. The aqueous solution of sodium carbonate with phenolphthalein indicator is pink in colour. While the aqueous solution of sodium bicarbonate is colourless.

Hence, the correct option is A.

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