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Why do some metals occur in the native s...

Why do some metals occur in the native state ?

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Some of the metals occur in the native state in nature because they :

How do metals occur in nature?

Fill in the blank and rewrite the whole statement. Two metals which occur in native state …………..

Which metal occurs in free state:

Which metal is sometimes found in native state ?

Name two elements that occur in the nature in the native state.

SHARAM PUBLICATION-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-EXERCISE
  1. Name two collectors used in froth floatation process.

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  2. Name one acidic and one basic flux.

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  3. Why do some metals occur in the native state ?

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  4. What is the role of stabilizer in froth floatation process ?

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  5. An ore of galena (PbS) is contaminated with Zinc blende (ZnS). Name on...

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  6. Which types of ores are roasted ?

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  7. Name the method used for the refining of copper metal.

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  8. Why sulphide ores are concentred by froth floatation process.

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  9. Which process is used for refining of metals which are used as Semicon...

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  10. What is formed when a flux reacts with a gangue material?

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  11. Name three important ores of iron .

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  12. Between CO and C , which is better reducing agent at 983 k

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  13. Fill in the blank and rewrite the whole statement. Two metals which ...

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  14. Fill in the blank and rewrite the whole statement. A non-metal which...

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  15. Fill in the blanks : During electro refining of copper ……….. And …………....

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  16. Fill in the blanks : …………. Is used as reducing agent during smelting.

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  17. Fill in the blanks : Froth floatation process is the suitable method o...

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  18. Fill in the blanks : A homogeneous mixture of a metal with mercury is ...

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  19. Fill in the blanks : Flux combines with infusible impurities to form …...

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  20. Fill in the blanks : …………… acts as acidic flux while ………. Acts as a ba...

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