What information does the following chemical equation conveys?
$Z n + H_{2} S O_{4} \to Z n S O_{4} + H_{2}$

One mole of reactants reacts to give two mole of hydrogen gas.

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Two mole of reactants reacts to give one mole of hydrogen gas.

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One mole of reactants reacts to give one mole of hydrogen gas.

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None of the above

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Solution

The correct option is B One mole of reactants reacts to give one mole of hydrogen gas.
Reaction:
$Z n + H_{2} S O_{4} \to Z n S O_{4} + H_{2}$
1 1 1 1
one mole one mole one mole one mole
$∴$ one mole of reactants reacts to give one mole of hydrogen gas.

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