MCQ
An atom is:
- AThe smallest particle of matter known
- BThe smallest particle of a gas
- CThe smallest indivisible particle of an element that can take part in a chemical change
- DRadioactive emission
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SARS and Swine flu are caused by:
Describe various causes of water pollution.
| S.No. | Specific Characteristic | Physical state |
| 1. | Ionised gases | |
| 2. | Most ordered state | |
| 3. | Least ordered state | |
| 4. | Fixed volume, no shape | |
| 5. | Cooling gas at super low temperature | |
The area under a speed-time graph represents a physical quantity which has the unit of: