An example of major air pollutant is
1). Oxygen
2). Carbon monoxide
3). Helium
4). Carbon dioxide
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2. White phosphorus is always kept under
3. Which of the following is not a nucleon?
4. Cement containing excess amount of lime
5. Muscle fatigue is caused by the accumulation of:
6. What material is used to make electric heater coil ?
7. The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is
8. Which among the following coal contains 90 per cent of carbon?
9. Chemical properties of isotopes .............
10. The major harmful gas emitted by automobile vehicle which causes air pollution is