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Which of the following statement is incorrect?

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Fixed melting point can be used to test the purity of solid organic compound

Hydrogen peroxide is purified by steam distillation

Impurities cause a decrease in the melting point of the compound

Crystallisation is based on sparingly solubility of compound at low temperature

answer is B.

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Detailed Solution

$H_{2} O_{2}$ is purified by vacuum distillation

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