Some metals react with acids and evolve: [0.5 marks]

(a) Hydrogen
(b) Oxygen
(c) Carbon dioxide
(d) Nitrogen

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Solution

Option (a), Hydrogen [0.5 marks]

Metals generally react with acids and produce metal salts along with the evolution of hydrogen gas.

Metal + Acid $\to$ Metal salt + Hydrogen gas

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Aluminium carbonate reacts with hydrochloride acid to evolve carbon dioxide gas.

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(a) oxygen
(b) carbon dioxide
(c) hydrogen
(d) nitrogen

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Some metals react with acids and evolve: [0.5 marks] (a) Hydrogen (b) Oxygen (c) Carbon dioxide (d) Nitrogen

Option (a), Hydrogen [0.5 marks] Metals generally react with acids and produce metal salts along with the evolution of hydrogen gas. Metal + Acid → Metal salt + Hydrogen gas

Some metals react with acids and evolve: [0.5 marks]

(a) Hydrogen
(b) Oxygen
(c) Carbon dioxide
(d) Nitrogen

Option (a), Hydrogen [0.5 marks]

Metals generally react with acids and produce metal salts along with the evolution of hydrogen gas.

Metal + Acid $\to$ Metal salt + Hydrogen gas