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Q.62 Given below are two statements: Statement I : Aqueous solution of K2Cr2O7 is preferred as a primary standard in volumetric analysis over Na2Cr2O7 aqueous solution. Statement II : K2Cr2O7 has a higher solubility in water than Na2Cr2O7. In the light of the above statements, choose the correct answer from the options given below:

1. Statement I is false but Statement II is true
2. Both Statement I and Statement II are true
3. Statement I is true but Statement II is false
4. Both Statement I and Statement II are false

Correct answer: Statement I is true but Statement II is false

Solution

K2Cr2O7 is preferred as a primary standard due to its stability and consistent composition, making it more reliable for volumetric analysis, while Na2Cr2O7 is less commonly used despite its higher solubility.

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