Question
Which of the statements is not true ?
A.
On passing $${H_2}S$$ through acidified $${K_2}C{r_2}{O_7}$$ solution, a milky colour is observed.
B.
$$N{a_2}C{r_2}{O_7}$$ is preferred over $${K_2}C{r_2}{O_7}$$ in volumetric analysis.
C.
$${K_2}C{r_2}{O_7}$$ solution in acidic medium is orange.
D.
$${K_2}C{r_2}{O_7}$$ solution becomes yellow on increasing the $$pH$$ beyond 7.
Answer :
$$N{a_2}C{r_2}{O_7}$$ is preferred over $${K_2}C{r_2}{O_7}$$ in volumetric analysis.
Solution :
$$N{a_2}C{r_2}{O_7}$$ is hygroscopic.