Chemistry · Metals and Non-metals
When aluminium foil is added to a freshly prepared sodium hydroxide (NaOH) solution, a gas is produced. Which of the following correctly describes a property of this gas?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It is a colourless and odourless gas that produces a 'pop' sound when a burning matchstick is brought near it.✓
- 2It is a brown-coloured, pungent-smelling gas.
- 3It is a colourless and odourless gas that supports combustion (helps a candle burn).
- 4It is a colourless and odourless gas that extinguishes a burning matchstick.
Correct answer
It is a colourless and odourless gas that produces a 'pop' sound when a burning matchstick is brought near it.
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