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What are noble metals?...

What are noble metals?

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Those metals that have least reactivity and do not react with air, water, acid and bases are referred to as noble metals.
For eg: Gold, platinum.
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CPC CAMBRIDGE PUBLICATION-METALS AND NON-METALS-ADDITIONAL QUESTIONS ( Answer the following)
  1. Define ionic compounds. Ionic compounds conduct electricity only in th...

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  2. Name five ways to prevent rusting .

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  3. What are noble metals?

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  4. State three reasons for the following facts: a. Sulphur is a non met...

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  5. What is cinnbar ? How is a metal extracted from cinnabar ? Explain bri...

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  6. Give two examples of ore of aluminium?

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  7. Why do potato - chips manufactures fill the packest of chips with nitr...

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  8. What is gangue and what is concentration?

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  9. a. Write electron dot diagram for chlorine (At No. 17) and Calcium (At...

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  10. Identify the nature of above compound and explain three physical prope...

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  11. Give reasons for the following : (i) School bells are made up of met...

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  12. Give reasons for the following : (i) School bells are made up of met...

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  13. What asre amphoteric oxides? Choose the amphoteric oxide from among th...

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  14. Differentiate between roasting and calcination. Explain the two with...

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  15. Name two metals than can be used to reduce metal oxides of metals.

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  16. State reasons for the following: Electric wires are covered with rub...

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  17. Which of the following metals cannot liberate hydrogen from dilute ...

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  18. State reasons for the following: Sulphide ore of a metal is first co...

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  19. Write any four physical properties of metals.

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  20. Give examples of the least reactive metals.

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