Question

When a white powdered substance 'X' is added to dilute HCl in a test tube, a brisk effervescence is observed with the liberation of a gas. A burning candle, brought near the mouth of test tube, is extinguished. Substance 'X' can be
Zinc
Sodium bicarbonate
Sodium hydroxide
Calcium oxide​

Answer 1

sodium bicarbonate

Explanation:

because of its chemical properties

Answer 2

Answer:

Here, x is Zinc.

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