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Give scientific reasons: Calcium floa...

Give scientific reasons:
Calcium floats on water during the reaction with water.

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CHETANA PUBLICATION-Metallurgy-EXAMPLE
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  7. Give scientific reasons: Ionic compounds are called electrolytes

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  16. Explain the following: An ore on treatment with dilute hydrochloric...

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  18. Explain the following: A metal 'X' acquires a green colour coating on ...

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  19. Explain the following: Name and write chemical formula of the green...

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