A reaction between lead and concentrated potassium hydroxide liberates a gas that burns with a characteristic pop-up sound. Identify that gas from the given options.

H_{2} O

(g)

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H_{2}

(g)

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O_{2}

(g)

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C O_{2}

(g)

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Solution

The correct option is B $H_{2}$ (g)
We know:
Amphoteric metal + Acid/Base $\to$ Salt + Hydrogen gas
$P b (s) + c o n c . K O H (a q) \to K_{2} P b O_{2} (a q) + H_{2} (g)$
Hydrogen gas formed from above reaction, on contact with a burning splinter produces a pop-up sound.
Note: Pure hydrogen gas does not burns with a pop-up sound and it burns silently with a pale blue flame. Moreover, vapours of other elements or compounds formed on reaction mixes with the hydrogen gas to make it impure. Hence, it burns with a characteristic pop-up sound.

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Similar questions

83. Identify the gas with the below characteristics:

1. It is a colour less and odour less gas.

2. It burns with a pop sound.

3. The gas is formed when a reaction occurs between acid and metals.

Options:

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