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Ozone Layer Depletion MCQs: App Download (Free Android iOS) & e-Book

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Ozone Layer Depletion MCQs App Download & e-Book PDF - 248

MCQ: 248

Chemical substance used in industry for cold cleaning, is known as

  1. methyl chloroform
  2. carbon tetrachloride
  3. halons
  4. hydrocarbons

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Ozone Layer Depletion  MCQs Apps (Android & iOS)

Ozone Layer Depletion MCQs App

General Knowledge  MCQs Apps (Android & iOS)

General Knowledge MCQs App

Basic Anthropology  MCQs Apps (Android & iOS)

Basic Anthropology MCQs App

Applied Anthropology  MCQs Apps (Android & iOS)

Applied Anthropology MCQs App