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When we add aluminium foil to freshly prepared sodium hydroxide solution, a gas is produced. Which of the following correctly states the property of this gas?

  • a)
    Colourless and odourless gas which produces a 'pop' sound when a burning match stick is brought near it

  • b)
    Colourless and odourless gas which promotes burning of a candle

  • c)
    Brown coloured pungent smelling gas

  • d)
    Colourless and odourless gas which extinguishes a burning match stick

Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
When we add aluminium foil to freshly prepared sodium hydroxide soluti...
A fresh solution of sodium hydroxide is prepared in a test tube by dissolving 3-4 pellets of it in 5 ml of water. A piece of aluminium foil is dropped into it. A burning match stick is brought near the mouth of the test tube. Then, a pop sound comes. As before, the 'pop' sound indicates the presence of hydrogen gas. Metals react with sodium hydroxide to produce hydrogen gas. So, burning match stick extinguishes.
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When we add aluminium foil to freshly prepared sodium hydroxide soluti...
Explanation:

When aluminium foil is added to freshly prepared sodium hydroxide (NaOH) solution, a gas is produced. This gas is hydrogen gas (H2), which is formed through a chemical reaction between the aluminium and the sodium hydroxide.

Here is a detailed explanation of each option and why option 'A' is the correct answer:

a) Colourless and odourless gas which extinguishes a burning match stick:
- Hydrogen gas is indeed colourless and odourless, so this property matches.
- Hydrogen gas is not flammable itself, so it can extinguish a burning match stick when it displaces oxygen from the combustion reaction.

b) Colourless and odourless gas which promotes burning of a candle:
- Hydrogen gas is not known to promote burning, but rather it can be used as a fuel itself.
- It is commonly used in fuel cells and can be burned to produce energy, but it doesn't promote the burning of other substances.

c) Brown coloured pungent smelling gas:
- Hydrogen gas is not brown in colour, but colourless.
- It is also odourless, so it doesn't have a pungent smell.

d) Colourless and odourless gas which produces a pop sound when a burning match stick is brought near it:
- Hydrogen gas is indeed colourless and odourless, so this property matches.
- When a burning match stick is brought near hydrogen gas, it can produce a pop sound due to its high reactivity and ability to combust.

Based on the above explanation, the correct answer is option 'A': Colourless and odourless gas which extinguishes a burning match stick.
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When we add aluminium foil to freshly prepared sodium hydroxide solution, a gas is produced. Which of the following correctly states the property of this gas?a)Colourless and odourless gas which produces a pop sound when a burning match stick is brought near itb)Colourless and odourless gas which promotes burning of a candlec)Brown coloured pungent smelling gasd)Colourless and odourless gas which extinguishes a burning match stickCorrect answer is option 'A'. Can you explain this answer?
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When we add aluminium foil to freshly prepared sodium hydroxide solution, a gas is produced. Which of the following correctly states the property of this gas?a)Colourless and odourless gas which produces a pop sound when a burning match stick is brought near itb)Colourless and odourless gas which promotes burning of a candlec)Brown coloured pungent smelling gasd)Colourless and odourless gas which extinguishes a burning match stickCorrect answer is option 'A'. Can you explain this answer? for CTET & State TET 2024 is part of CTET & State TET preparation. The Question and answers have been prepared according to the CTET & State TET exam syllabus. Information about When we add aluminium foil to freshly prepared sodium hydroxide solution, a gas is produced. Which of the following correctly states the property of this gas?a)Colourless and odourless gas which produces a pop sound when a burning match stick is brought near itb)Colourless and odourless gas which promotes burning of a candlec)Brown coloured pungent smelling gasd)Colourless and odourless gas which extinguishes a burning match stickCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for CTET & State TET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When we add aluminium foil to freshly prepared sodium hydroxide solution, a gas is produced. Which of the following correctly states the property of this gas?a)Colourless and odourless gas which produces a pop sound when a burning match stick is brought near itb)Colourless and odourless gas which promotes burning of a candlec)Brown coloured pungent smelling gasd)Colourless and odourless gas which extinguishes a burning match stickCorrect answer is option 'A'. Can you explain this answer?.
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