Question

Which of the statements is not true?

• 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

Answer 1

Answer: (B)

$Na _2Cr_2O_7$ is preferred over $K_2Cr_2O_7$ in volumetric analysis

Answer 2

Because $Na _{2} Cr _{2} O _{7}$ is hygroscopic