| 1. | Rate of reaction can be calculated by dividing change in mass or volume by |
| a. | time taken |
| b. | total mass |
| c. | amount of volume |
| d. | the temperature |
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Answer: (a).time taken
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| 2. | Chemical substances speeding up rate of chemical reaction is called as |
| a. | pressure |
| b. | concentration |
| c. | catalysts |
| d. | inhibitors |
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Answer: (c).catalysts
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| 3. | Haber process for manufacturing of ammonia requires catalyst of |
| a. | vanadium oxide |
| b. | iron |
| c. | platinum |
| d. | nickel |
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Answer: (b).iron
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| 4. | Factors affecting speed of reaction include |
| a. | volume of gas |
| b. | change in mass |
| c. | pressure |
| d. | temperature change |
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Answer: (c).pressure
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| 5. | Milk turns sour due to |
| a. | conversion of lactose in lactic acid |
| b. | increased chemical changes |
| c. | conversion of lactic acid into lactose |
| d. | both a and b |
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Answer: (d).both a and b
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