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Chemical Reaction: Factor Affecting MCQs App Download & e-Book - 623

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MCQ: 623

Flour mills and coal mines need to be well ventilated because

  1. the surface area of coal and flour needs to be digged out
  2. coal and flour particles are scattered in the form of lumps
  3. coal and flour particles are scattered in the form of powder
  4. coal and flour particles can get ignited very easily
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Chemical Reaction Factor Affecting Apps (Android & iOS)

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