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प्रश्न
Making use only of substances chosen from those given below:
Dilute sulphuric acid
Sodium carbonate
Zinc
Sodium sulphite
Lead
Salcium carbonate
Give the equation for the reaction by which you could obtain:
(i) Hydrogen
(ii) Sulphur dioxide
(iii) Carbon dioxide
(iv) Zinc Carbonate (two steps required).
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उत्तर
(i) Zinc reacts with dilute sulphuric acid to evolve hydrogen.
\[\ce{Zn + H2SO4 → ZnSO4 + H2 ^}\]
(ii) Sodium sulphite reacts with dilute sulphuric acid to give sulphur dioxide.
\[\ce{Na2SO3 + H2SO4 → Na2SO4 + H2O + SO2 ^}\]
(iii) Sodium carbonate reacts with dilute sulphuric acid to give carbon dioxide.
\[\ce{Na2CO3 + H2SO4 → Na2SO4 + H2O + CO2 ^}\]
(iv) Zinc reacts with dilute sulphuric acid to form zinc sulphate, which in reaction with sodium carbonate forms zinc carbonate.
\[\ce{ Zn + H2SO4 → ZnSO4 + H2 ^}\]
\[\ce{ZnSO4 + Na2CO3 → ZnCO3 + Na2SO4}\]
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संबंधित प्रश्न
Comment, sulphuric acid is referred to as King of chemicals.
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A piece of wood becomes black when concentrated sulphuric acid is poured on it.
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| Column 1 | Column 2 | Column 3 |
| Substance reacted with acid | Dilute or concentrated acid | Gas |
| Hydrogen | ||
| Carbon dioxide | ||
| Only chlorine |
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100ml of 98% sulphuric acid is kept open.
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