Identify the incorrect statements regarding p | vedclass

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(D) primary standard must be stable,non-hygroscopic,and available in a high state of purity.Statement $(A)$ is correct: It should be available in a pu

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$(C)$ and $(E)$ only

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(D) primary standard must be stable,non-hygroscopic,and available in a high state of purity.Statement $(A)$ is correct: It should be available in a pure,dry form.Statement $(B)$ is correct: It should not react with atmospheric components like moisture or $CO_2$.Statement $(C)$ is incorrect: $A$ primary standard must $NOT$ be hygroscopic.Statement $(D)$ is correct: It should be readily soluble in water.Statement $(E)$ is incorrect: $KMnO_4$ and $NaOH$ are secondary standards because they are not stable or pure enough to be primary standards.Therefore,the incorrect statements are $(C)$ and $(E)$.

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