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In the thermite process, is used as a re...

In the thermite process, _____is used as a reducting agent.

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aluminium
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In the alumino-thermite process, Al acts as :

In the thermite process, iron oxide is reduced to moleten iron by Al powder because

PRADEEP-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -TEST YOUR GRIP (II. FILL IN THE BLANKS)
  1. Calcination is the process of heating the ore strongly in the of air.

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  2. An ore of tin containing FeCrO4 is concentrated by …………. .

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  3. ores are concentrated by froth flotation and roasted in excess of air ...

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  4. involves treating the powdered ore with a suitable reagent which selec...

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  5. Sodium cyanide solution is used to extract or from its ores.

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  6. Flux combines the infusible impurities to form.

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  7. acts as an acidic flux whileacts as a basic flux.

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  8. In the metallurgy of copper, the flux used to remove the basic impurit...

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  9. During extraction of iron from haematite, the flux used is .

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  10. ………… involves reduction of metal oxide with coke or carbon monox...

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  11. In the thermite process, is used as a reducting agent.

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  12. …………..is the purest form of iron.

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  13. Above 1073 K, ………… reduces FeO to Fe while below 1073K, …………… r...

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  14. Highly electropositive metals like sodium, megnesium or aluminium ...

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  15. Low melting metals like lead in tin are refined by .............. .

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  16. In the Mond's process,…… is used to purify impure nickel.

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  17. In the van Arkel process .........is used to purify ...............

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  18. ...............is used to prepare semiconductor grade silicon or ge...

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  19. During extraction of iron from haematite, the slag formed consists...

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  20. ..........is added to Al2O3 in Hall - Heroult process for extracti...

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