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A zinc ore gave CO(2) on treatment with ...

A zinc ore gave `CO_(2)` on treatment with a dilute acid. Identify the ore and write its chemical formula.

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Calamine, `ZnCO_(3)`
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The oxide that gives H_(2)O_(2) on treatment with a dilute acid is

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(a) What is the difference betwee a mineral and an ore? (b) Which metal is extracted from cinnabar ore? (c) Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula. (d) How is sodium metal extracted? Explain with the help of equation of the reaction involved. (e) Name three other metals which are extracted in a manner similar to sodium.

Write the names of any two ores of silver and give their chemical formula.

LAKHMIR SINGH & MANJIT KAUR-METALS AND NON-METALS-Exercise
  1. You can buy solid air-freshnersin shops. Do you think these substanecs...

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

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

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

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

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

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

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  8. Explain why,iron sheets are coatedwith zinc.

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  9. Why do we apply paint on iron articles?

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

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

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  12. Name an alloy of lead and tin.

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

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  14. what is an amalgam?

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

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  16. Name one method for the refining of metals.

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  17. State two conditions for the rusting of iron.

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

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  19. Name two allys ofiron.what elements are present in these alloys?

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  20. Give reason for the following: Silver, gold and platinum are used to...

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