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Flux combines the infusible impurities t...

Flux combines the infusible impurities to form_____.

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slag
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Fill in the blanks with the correct choice. The undesired impurities present in the ores are called overset((i))("______") . To remove the volatile impurities from the ore, the overset((ii))("______") process is carried ot Flux combines with non-fusible impurities to form overset((iii))("______") . CaO acts as a overset((iv))("______") flux.

Read the given passage carefully and fill in the blanks by selecting an appropriate option. Oxides of ul(" (i) ") are reduced to their respective metals by heating with coke and the process is called ul(" (ii) ") . Before carrying out reduction with carbon, if the calcined or roasted ore still contains infusible impurities of earthy matter, called ul(" (iii) ") , an additional substance, called ul(" (iv) ") is added which combines with (iii) to form a fusible material, called ul(" (v) ") .

(iii) Substances which convert infusible impurities present in ores into fusible substances during smeting are called slag.

During smelting, an additional substance is added which combines with impurities to form a fusible product. The substance added is known as :

Lipids can combine with proteins to form _________

What is a flux ? What is its nature ? Name the substances which are formed when flux combines with gangue impurities.

Ethylene combines with sulphur monochloride to form.

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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