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प्रश्न
What information do the following chemical equations convey? Mg + 2HCl → MgCl2+ H2
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उत्तर
This equation conveys the following information:
Magnesium reacts with hydrochloric acid to form magnesium chloride and hydrogen gas.
24 g of magnesium reacts with 2(1 + 35.5) = 73 g of hydrochloric acid to produce (24 + 71), i.e. 95 g of magnesium chloride.
Hydrogen produced at STP is 22.4 litres.
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Match the columns.
| Reactants | Products | Types of chemical reaction | ||
| 1. | MgH2 | → | Mg + H2 | Endothermic |
| 2. | 2H2S + SO2 | → | 3S + 2H2O | Oxidation |
| 3. | CaO + H2O | → | Ca(OH)2 + heat | Exothermic |
| Redox | ||||
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