Chemistry
Grade-10
Easy
Question
Multiple True-False Type Questions
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.
IV. Bleaching powder is acts as both oxidising as well as reducing agent due to presence of oxygen.
Hint:
Bleaching powder is a strong oxidizing agent used for drinking water purification.
The correct answer is:
- Bleaching powder is extensively used in purifying drinking water.
- Sodium hydroxide on being exposed to air reacts with carbon dioxide present in air to form sodium carbonate.
- Sodium hydroxide can be used in the purification of bauxite during extraction process.
- Bleaching powder acts as strong oxidizing agent by releasing nascent oxygen.
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