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Which metal is used to remove air from v...

Which metal is used to remove air from vacuum tube ?

A

silica

B

metal oxide

C

silica and metal oxide

D

impurities from ore

Text Solution

Verified by Experts

The correct Answer is:
4
The additional substance used to remove impurities `(` gangue `)` from concentrated ore by chemically reacting with it and converting in into fusible mass `(` slag `)` is called flux.
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