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From among the following , choose metals...

From among the following , choose metals and nonmetals. State one of the properties on the basis of which you have made your choice.
(i) Graphite (ii) sodium (iii) Sulphur (iv) Helium

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BHARATI BHAWAN (ENGLISH)-METALS AND NONMETALS -Very short answer Questions
  1. Name three nonmetallic oxides which are acidic . What happens when the...

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  2. State any four uses of aluminium.

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

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

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  5. What is rust ? How is it formed ?

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  6. What do you mean by corrosion of metals ?

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  7. Explain why iron sheets are coated with zinc.

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

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

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

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

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  12. what is vulcanization of rubber ?

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

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

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

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  16. Explain why alloy is a uniform mixture.

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

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

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

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

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