Class 9 Chemistry MCQs (Grade 9) From Textbook

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Class 9 Chemistry MCQs – Practice Test 6 (Chapter 2)

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The MCQs: In chromium plating, few drops of Sulphuric acid are added to the electrolyte to prevent; "Electrochemistry" App (Android, iOS) with answers: reduction, oxidation, hydrolysis, and sublimation for online certificate programs. Practice Electrochemical Industries MCQ Questions, download Apple Book (Free Chapter) for school certificate.

Electrochemistry MCQ – Practice Test 6 PDF Download

MCQ: 26

In chromium plating, few drops of Sulphuric acid are added to the electrolyte to prevent

  1. oxidation
  2. reduction
  3. hydrolysis
  4. sublimation
MCQ: 27

The electrodes used in the production of sodium metal are

  1. iron cathode and graphite anode
  2. sodium cathode and carbon anode
  3. aluminum cathode and fluoride anode
  4. aluminum cathode and sodium anode
MCQ: 28

In thermal power stations, carbon atoms undergo oxidation to form

  1. CO2
  2. CO
  3. H2O
  4. O2
MCQ: 29

Electrolytes convert electricity in

  1. solid state
  2. liquid state
  3. gaseous state
  4. plasma state
MCQ: 30

A concentrated aqueous solution of sodium chloride is called

  1. aqueous solution
  2. salt solution
  3. brine
  4. lemonade

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