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-p-Block elements - I — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry-p-Block elements - I1 Mark
MCQ
A layer of coke is spread over bauxite during electrolytic reduction of alumina by Hall-Heroult process. This layer acts as a/an:
  • A
    flux
  • B
    slag to remove impurities
  • C
    reducing agent
  • ✓
    insulation and does not allow heat to escape
✓

Answer

Correct option: D.
insulation and does not allow heat to escape
d
the correct option is (D)

explanation:

A layer of coke is spread over bauxite during electrolytic reduction of alumina by Hall Heroult process. This layer acts as as insulation by preventing it from corrosion, coke powder is kept at the top which also prevents escape of heat.

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