NEETChemistryD and F Block ElementsMCQ+4 / −1
Which of the statements is not true?
- AOn passing H2S through acidified K2Cr2O7 solution, a milky colour is observed.
- BNa2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis.
- CK2Cr2O7 solution in acidic medium is orange.
- DK2Cr2O7 solution becomes yellow increasing the pH beyond 7.
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Correct answer: B
Na2Cr2O7 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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