D-And F-Block Elements Ques 481
Question: Which of the following statements is false-
Options:
A) $ Na_2Cr_2O_7 $ is less soluble than $ K_2Cr_2O_7 $ .
B) $ Na_2Cr_2O_7 $ is primary standard in volumetry.
C) $ CrO{{_4^{2-}}^{~}} $ is tetrahedral in shape.
D) $ Cr_2O_7^{2-} $ has a $ Cr-O-Cr $ bond.
Show Answer
Answer:
Correct Answer: A
Solution:
bond in $ Cr_2O_7^{2-} $ $ Na_2Cr_2O_7 $ is used an primary standard in volumetry. Hydration energy of $ N{{a}^{+}} $ is greater than $ {{K}^{+}} $ because of smaller size of $ N{{a}^{+}},Na_2Cr_2O_7 $ is more soluble than $ K_2Cr_2O_7. $
