O Level Online Courses

Chapter 11: IGCSE O Level Chemistry Exam Tests

IGCSE O Level Chemistry MCQs - Chapter 11

Redox Reactions Trivia Questions and Answers PDF - 8

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The Trivia Quiz: Change of orange color of Chromium(VI) (Cr+6) to green color of Chromium(III) (Cr+3) indicates the presence of a; "Redox Reactions" App APK Download (Free) with answers oxidizing agent, reducing agent, reagent and drying agent to study online classes courses. Practice redox reactions quiz questions, download Kindle eBook (Free Sample) for two year degree programs.

Redox Reactions Questions & Answers PDF Download: MCQ Quiz 8

MCQ 36: Change of orange color of Chromium(VI) (Cr+6) to green color of Chromium(III) (Cr+3) indicates the presence of a

  1. reducing agent
  2. oxidizing agent
  3. reagent
  4. drying agent

MCQ 37: Which of the following option is correct in case of exothermic reactions?

  1. making of chemical bond
  2. more common reactions
  3. burning of carbon
  4. all of above

MCQ 38: When dichromate (VI) ion becomes reduced to chromium (III) ion, a change of color occurs from

  1. purple to pink
  2. purple to colorless
  3. orange to purple
  4. orange to green

MCQ 39: Reducing agents does not include

  1. chlorine
  2. carbon
  3. potassium iodide
  4. carbon monoxide

MCQ 40: At high temperatures, enzymes

  1. act very rapidly
  2. get denatured
  3. form cations
  4. form anions

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SAT Chemistry App (iOS & Android)