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Question

Quality that is not suitable for a fuel is ________ .
  1. high calorific value with ignition temperature that is well above the normal room temperature
  2. low rate of evaporation at room temperature
  3. carbon particles are expelled with smoke
  4. low content of non-combustibles

A
carbon particles are expelled with smoke
B
low content of non-combustibles
C
low rate of evaporation at room temperature
D
high calorific value with ignition temperature that is well above the normal room temperature
Solution
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Quality that is not suitable for fuel is carbon particles are expelled with smoke and cause air pollution.

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