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Name the process that is used to concent...

Name the process that is used to concentrate sulphide ore. Describe briefly two stages that are involved in the conversion of concnetrated sulphide ore into corresponding metal.

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Name the process used for the enrichment of sulphide ore.

(a). Name two metals which occur in nature in free state as well as in combined state. (b). Name one ore of manganese. Which compound of manganese is present in this ore? Also write, its chemical formula. (c) A zinc ore on heating in air forms sulphur dioxide. Describe briefly any two stages involved int eh conversion of this concentrated ore into zinc metal.

Name the process by which sulphide ores are concentrated.

Froth flotation process used for the concentration of sulphide ore.

Froth floatation process used for the concentration of sulphide ore :

BHARATI BHAWAN (ENGLISH)-METALS AND NONMETALS -Very short answer Questions
  1. State any four uses of aluminium.

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  2. From among the following , choose metals and nonmetals. State one of t...

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  3. What happens when NH(4)OH is added to an aqueous solution of aluminium...

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  4. What is rust ? How is it formed ?

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  5. What do you mean by corrosion of metals ?

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  6. Explain why iron sheets are coated with zinc.

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  7. Mention any one method by which corrosion of metals can be prevented.

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  8. What is an alloy ? Write the composition of brass or bronze.

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  9. What is stainless steel? Mention two of its properties.

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  10. Give the equation(s) to show what happens when NH(4)OH is gradually ad...

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  11. what is vulcanization of rubber ?

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  12. Mention a reaction showing the reducing property of SO2 .

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  13. Why is hydrogen, a nonmetal, is included in the activity series of met...

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  14. What is amalgam ? How does it differ from alloy ?

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  15. Explain why alloy is a uniform mixture.

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  16. Show by means of chemical equations how roasting can convert a sulphid...

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  17. Name the process that is used to concentrate sulphide ore. Describe br...

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  18. What is an alloy ? Write the composition of an alloy called bronze. Gi...

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  19. Write the chemical formula of cryolite. What is the purpose of adding ...

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  20. Why is sulphur used in the vulcanization of rubber ?

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