Chemistry
Grade-10
Easy
Question
When substance A dissolves in hydrochloric acid, it gives effervescence of CO2 to give the common salt as a major product, and when this substance (A) reacts with lime, it gives the substance B as a major product along with calcium carbonate. Identify A and B in the above chemical reaction.
- A = Sodium carbonate, B = Sodium bicarbonate
- A = Sodium bicarbonate, B = Sodium hydroxide
- A = Sodium carbonate, B= Sodium hydroxide
- A= Sodium Hydroxide, B= Sodium carbonate
Hint:
A = Sodium carbonate, B= Sodium hydroxide
The correct answer is: A = Sodium carbonate, B= Sodium hydroxide
When substance sodium carbonate dissolves in hydrochloric acid, it gives effervescence of CO2 to give the common salt as a major product, and when this substance sodium carbonate reacts with lime, it gives the substance sodium hydroxide as a major product along with calcium carbonate.
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State whether the following statements are true or false.
I. Bleaching powder is extensively used in the petroleum refining.
II. Sodium hydroxide on being exposed to air reacts with the CO2 present in the air to form sodium carbonate.
III. Sodium hydroxide can be used in the purification of bauxite (an aluminium ore) during the extraction process.
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