D-And F-Block Elements Ques 86
Question: $ CrO_3 $ dissolves in aqueous $ NaOH $ to give
[J & K 2005]
Options:
A) $ CrO_4^{2-} $
B) $ Cr(OH)_3^{-} $
C) $ Cr_2O_7^{2-} $
D) $ Cr{{(OH)}_2} $
Show Answer
Answer:
Correct Answer: A
Solution:
$CrO_3$ reacts with aqueous NaOH to form $Na_2CrO_4$ that is $CrO^{−2} _4.$
$ CrO_3+2NaOH\to \underset{\text{Yellow solution}}{\mathop{Na_2CrO_4}},+H_2O $
