The 'pop' sound occurred due to formation of which gas :

oxygen

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hydrogen

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nitrogen

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carbon dioxide

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Solution

The correct option is C hydrogen
In (i) and in (ii) $H_{2}$ gas is released.
In (i) $2 A l (s) + 6 H C l (a q) ⟶ 2 A l^{3 +} (a q) + 6 C l^{-} (a q) + 3 H_{2} (g)$
In (ii) $2 A l (s) + 2 N a O H (a q) + 6 H_{2} O (l) ⟶ 2 N a^{+} [A l (O H)_{4}]^{-} (a q) + 3 H_{2} (g)$
The pop sound is due to Hydrogen gas in (i) and (ii)

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Dear sir,

Please help me with the question below.

If a lighted splint is put into a small sample of a gas and a 'pop' sound is heard, the gas is identified as hydrogen. What is the 'pop' sound due to?

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The 'pop' sound occurred due to formation of which gas :

The correct option is C hydrogenIn (i) and in (ii) H2 gas is released.In (i) 2Al(s)+6HCl(aq)⟶2Al3+(aq)+6Cl−(aq)+3H2(g)In (ii) 2Al(s)+2NaOH(aq)+6H2O(l)⟶2Na+[Al(OH)4]−(aq)+3H2(g)The pop sound is due to Hydrogen gas in (i) and (ii)