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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3ev051

Which of the following statements about types of particulate pollutants are correct?

  1. ADust is formed by crushing and grinding of solids.
  2. BSmoke particles arise from incomplete combustion of fuels.
  3. CMist consists of fine solid particles produced by grinding.
  4. DFumes are formed by condensation of vapours of solids.

Answer: A, B, D

Smoke comes from burning, fumes from condensation of vapours, and dust from mechanical breakup of solids. Mist consists of liquid droplets, not solid particles from grinding.
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More questions on Air pollution: gaseous pollutants, acid rain, smog