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Give scientific reasons for the followin...

Give scientific reasons for the following:
Calcium floats on water during the reactionwith water.

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CHETANA PUBLICATION-Metallurgy-EXAMPLE
  1. How are metals of less reactivity extracted?

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  2. Label the parts complete the paragraph with the words given in the bra...

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  3. Label the parts of completer the paragraph with the words given in the...

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  4. Answer the question based on the given diagram Label the diagram and...

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  5. Label it correctly answer the question given below: What does the a...

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  6. Label it correctly answer the question given below: In the above pr...

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  7. Label it correctly answer the question given below: Give the cathod...

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  8. Anodizing is a process of forming a thick layer of .

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  9. The reactivity of metals with dil HCI in decreasing order is

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  10. Select the odd man out Sodium oxide, Zinc oxide, Potassium oxide, Ma...

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  11. Find out the correlations: Brass:Copper and zinc : : Brozne:

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  12. State whether the following statements are true or false, correct the ...

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  13. Anodes need do be replaced from time to time during the electrolysis o...

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  14. Give scientific reasons for the following: Calcium floats on water du...

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  15. Write chemical equation for the following events: A reaction was br...

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  16. Explain the following: The electronic configuration of metal A is 2...

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  17. Explain magnetic separation method.

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  18. How can corrosion of metals be prevented?

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  19. How are moderately reactive metals extracted?

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  20. Explain electrolytic reduction of alumina with the help of diagram.

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