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ICSE Class 10 Chemistry Question 6 of 20

Solved 2022 Semester 2 Question Paper ICSE Class 10 Chemistry — Question 10

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10
Question

Question 1(x)

Substance which helps to lower the fusion point of the mixture in Hall Heroult Process:

  1. Coke
  2. Concentrated sodium hydroxide
  3. Fluorspar
  4. Concentrated potassium hydroxide
Answer

Fluorspar

Reason — Fluorspar lowers the fusion point of the mixture in Hall Heroult Process and the mixture fuses at 950° C instead of 2050° C.