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Which of the following are added to purified alumina?

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Question

Which of the following are added to purified alumina?

Options

  • Na3AlF6

  • CaF2

  • Both Na3AlF6 and CaF2

  • Neither Na3AlF6 nor CaF2

MCQ
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Solution

Both Na3AlF6 and CaF2

Explanation:

Cryolite (Na3AlF6) and fluorspar (CaF2) are both added to purified alumina to lower its extremely high melting point and enhance its overall electrical conductivity.

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Chapter 7: Metallurgy - EXERCISE [Page 156]

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Lakhmir Singh Chemistry [English] Class 10 ICSE
Chapter 7 Metallurgy
EXERCISE | Q 5. | Page 156
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