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You can buy solid air-freshnersin shops....

You can buy solid air-freshnersin shops. Do you think these substanecs are ionic or covalent? Why?

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Solid air-freshners are covalent compounds because they are volatile
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LAKHMIR SINGH & MANJIT KAUR-METALS AND NON-METALS-Exercise
  1. The atomic number of an element X is 12. (a). What must an atom of X...

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  2. The atomic number of an element Y is 16. (a). What must an atom of Y...

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  3. You can buy solid air-freshnersin shops. Do you think these substanecs...

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  4. Give the formulae of the chlorides of the elements X and Y having atom...

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  5. A zinc ore gave CO(2) on treatment with a dilute acid. Identify the or...

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  6. What chemical process is used for obtaining a metal from its oxide?

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  7. State two ways to prevent the rusting of iron.

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  8. What is meant by galvanisation? Why is it done?

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  9. Name the metal which is used for galvanising iron.

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  10. Explain why,iron sheets are coatedwith zinc.

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  11. Why do we apply paint on iron articles?

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  12. Give reason for the following: Carbonate and sulphide ores are usual...

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  13. Name a reducing agent that may be used to obtain manganese from mangan...

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  14. Name an alloy of lead and tin.

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  15. Give the composition of an alloy called solder. State its one property...

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  16. what is an amalgam?

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  17. How many carats is pure gold ? Why is pure gold not suitable for makin...

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  18. Name one method for the refining of metals.

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  19. State two conditions for the rusting of iron.

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  20. In one method of rust prevention, the iron is not coated with anything...

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