| 1. | Conversion of carbonate into oxides and carbon dioxide is called as |
| a. | combustion |
| b. | Thermal decomposition |
| c. | Neutralization |
| d. | Respiration |
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Answer: (b).Thermal decomposition
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| 2. | Conversion of Copper Hydroxide (Cu(OH)₂) into Copper Oxide (CuO) and water (H₂O) is an example of |
| a. | combustion |
| b. | Thermal decomposition |
| c. | Neutralization |
| d. | Respiration |
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Answer: (b).Thermal decomposition
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| 3. | In exothermic reactions, final energy content of products |
| a. | is lower than the energy contents of the reactants |
| b. | is higher than the energy contents of the reactants |
| c. | does not depend upon the energy content of the reactants |
| d. | forms highly stable compounds |
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Answer: (a).is lower than the energy contents of the reactants
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| 4. | Upon heating, sodium nitrate NaNO₃(s) gets converted into |
| a. | sodium oxide |
| b. | nitric acid |
| c. | sodium hydrogen oxide |
| d. | None of Above |
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Answer: (d).None of Above
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| 5. | LPG is obtained by |
| a. | cooling methane |
| b. | cooling natural gas |
| c. | cooling carbon dioxide |
| d. | cooling nitrous oxide |
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Answer: (b).cooling natural gas
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