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QAIPM-2012-Ch-1693: NEET 2012 Chemistry - Class 12 AIPM-2012-Ch-1693 Solution: Which of the statements is not true?

Which of the statements is not true?

Multiple Choice Options

A On passing $H_2S$ through acidified $K_2Cr_2O_7$ solution, a milky colour is observed.
B $Na_2Cr_2O_7$ is preferred over $K_2Cr_2O_7$ in volumetric analysis.
C $K_2Cr_2O_7$ solution in acidic medium is orange.
D $K_2Cr_2O_7$ solution becomes yellow on increasing the pH beyond 7.

Step-by-Step Verified Solution

Na 2 Cr 2 O 7 is hygroscopic in nature and therefore accurate weighing is not possible in normal atmospheric conditions. A hygroscopic substance absorbs moisture from atmosphere and this could lead to inaccuracies in weight.

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