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प्रश्न
Give the reaction of acid with chlorides. State the conditions under which they react.
उत्तर
Chlorides react with concentrated sulphuric acid on warming to liberate hydrogen chloride.
The process requires two steps due to the presence of two replaceable hydrogen ions in H2SO4.
\[\ce{NaCl + H2SO4(conc.) ->[below 200^\circ C] NaHSO4 + HCl\uparrow}\]
\[\ce{2NaCl + H2SO4 ->[above 200°C] Na2SO5 + 2HCl}\]
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