Magnesium, aluminium or iron on reaction with dilute hydrochloric acid liberates ___ gas.

hydrogen chloride

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hydrogen

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oxygen

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chlorine

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Solution

The correct option is B hydrogen
Metals react with acids to form their respective salt and hydrogen gas.
Magnesium, aluminium and iron are metals hence, will liberate hydrogen gas.
Magnesium reaction with hydrochloric acid -
$M g (s) + 2 H C l ⟶ M g C l_{2} + H_{2} (g)$
Aluminium reaction with hydrochloric acid -
$A l + 3 H C l ⟶ {A l C l}_{3} + \frac{3}{2} H_{2} (g)$
Iron reaction with hydrochloric acid -
$F e (s) + 2 H C l ⟶ {F e C l}_{2} (a q) + H_{2} (g)$

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Similar questions

Write word equations and then balanced equations for the reaction taking

place when −

(a) dilute sulphuric acid reacts with zinc granules.

(b) dilute hydrochloric acid reacts with magnesium ribbon.

(d) dilute hydrochloric acid reacts with iron filings.

Balance the following reaction:

1.when ammonium hydroxide is added to a solvent of iron (II) Sulphate , a green ppt of iron (II) hydroxide and ammonium sulphate is formed.

2.Zinc reacts with dilute hydrochloric acid to form zinc chloride and hydrogen gas liberated.

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