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प्रश्न
Hydrogen chloride gas is prepared in the laboratory by the action of concentrated sulphuric acid on sodium chloride.
Give a balanced chemical equation for the above reaction.
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उत्तर
\[\ce{2NaCl + H2SO4 ->[< 200°C][]2HCl + Na2SO4}\]
Sodium's greater reactivity than hydrogen replaces 'H' from acid to produce matching salts and strong volatile acid (HCl).
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