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A certain amount of a gas at 27^(@)C and...

A certain amount of a gas at `27^(@)C` and 1 atmospheric pressure occupies a volume of `25dm^(3)`. If the pressure is kept constant and the temperature is raised to `77^(@)C`, what would be the volume of the gas ?

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ICSE-SPECIMEN PAPER 3-SECTION II
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  4. What are the causes for Permanent hardness

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  5. Explain one method of removing permanent hardness.

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  6. Give the equation for the lab preparation of hydrogen.

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  7. Why the solid reactant is used in granulated form ?

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  8. How is the gas recognised ?

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  9. Mention any two impurities present in hydrogen prepared in laboratory.

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  10. How are these impurities removed ?

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  11. State three precautions taken in preparing hydrogen.

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  12. Give three main characteristics of representative elements.

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