A solution of copper oxide was prepared by heating, igniting and precipitation. Which of the following method will give higher ratio of copper oxide?

Heating

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Precipitation

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Ignition

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All of the above will give the same ratio

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Solution

The correct option is D All of the above will give the same ratio
In a compound, the ratio of the atoms or element by mass remains always the same irrespective of the source of the compound. This means a certain compound is always formed by the combination of atoms in the same ratio by mass. Hence, copper oxide made from any method will always give the same ratio of copper oxide.

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