Question
Which of the following statements is false ?
A.
$$N{a_2}C{r_2}{O_7}$$ is less soluble than $${K_2}C{r_2}{O_7}.$$
B.
$$N{a_2}C{r_2}{O_7}$$ is primary standard in volumetry.
C.
$$CrO_4^{2 - }$$ is tetrahedral in shape.
D.
$$C{r_2}O_7^{2 - }$$ has a $$Cr - O - Cr$$ bond.
Answer :
$$N{a_2}C{r_2}{O_7}$$ is less soluble than $${K_2}C{r_2}{O_7}.$$
Solution :
$$N{a_2}C{r_2}{O_7}$$ is used as primary standard in volumetry. Hydration energy of $$N{a^ + }$$ is greater than $${K^ + }$$ because of smaller size of $$N{a^ + },N{a_2}C{r_2}{O_7}$$ is more soluble than $${K_2}C{r_2}{O_7}.$$
$$N{a_2}C{r_2}{O_7}$$ is used as primary standard in volumetry. Hydration energy of $$N{a^ + }$$ is greater than $${K^ + }$$ because of smaller size of $$N{a^ + },N{a_2}C{r_2}{O_7}$$ is more soluble than $${K_2}C{r_2}{O_7}.$$