Sarthaks Test
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Which of the following statements is not true? 

(a) on passing H2S, through acidified K2Cr2O7 solution, a milky colour is observed. 

(b) Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis 

(c) K2Cr2O7 solution in acidic medium is orange in colour 

(d) K2Cr2O7 solution becomes yellow on increasing the pH beyond 7

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2 Answers

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(b) Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis

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(b) Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis.

Reason: Na2Cr2O7 is deliquescent and so it is not used as primary standard in volumetric analysis

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