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Write balanced chemical equations for th...

Write balanced chemical equations for the following processes :
`MnO_(2)` is heated with conc. HCl.

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CBSE COMPLEMENTARY MATERIAL-PRACTICE PAPER 1-Questions
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  9. What is the role of activated charcoal in gas mask?

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  11. How does chemisorption vary with temperature.

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  13. What is the role of silica in the extraction of copper?

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  14. What type of metals are generally extracted by electrolytic method?

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  15. (b) Why do transition metals form alloy ?

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  16. Give reasons for the following: Mn(2)O(3) is basic whereas Mn(2)O(7)...

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  17. Give reasons for the following: Eu^(2+) is a strong reducing agent.

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  18. Write the structure of monomers used for getting the following polymer...

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  19. Write the structure of monomers used for getting the following polymer...

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