Class VIII

There are following zones of a flame
  1. 2
  2. 3
  3. 4
  4. No any zone
Coal burns with
  1. Flame
  2. Only Glow
  3. Both flame and glow
  4. None of these
Burning of charcoal in a closed room will produce
  1. Carbon dioxide
  2. Nitrogen dioxide
  3. Carbon monoxide
  4. all of above
Ignition temperature is
  1. Lowest temperature at catch fire
  2. Higher temperature at catch fire
  3. Any temperature
  4. None of these
The products of combustion are
  1. Carbon dioxide and water
  2. Oxygen and water
  3. Only carbon dioxide
  4. Only oxygen
Time Elapsed

HR : MIN : SEC
Question Answered
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