Write the balanced chemical equation when barium reacts with hydrochloric acid.

B a + 2 H C l \to 2 H + B a C l_{2}

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B a + 2 H C l \to B a H_{2} + C l

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B a + 2 H C l \to H_{2} + B a C l_{2}

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B a + H C l \to B a H C l

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Solution

The correct option is C $B a + 2 H C l \to H_{2} + B a C l_{2}$
In a balanced equation, the number of atoms of each element will remain equal.
$B a + 2 H C l \to B a C l_{2} + H_{2}$
When barium reacts with hydrochloric acid, it will form barium chloride with the evolution of hydrogen gas.
Here, 1 mole of barium reacts with 2 moles of hydrochloric acid to produce 1 mole of barium chloride and 1 mole of hydrogen gas.
Hence, option $C$ is correct.

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