S Block Elements Question 153
Question: If $ NaOH $ is added to an aqueous solution of $ Z{{n}^{2+}} $ ions, a white precipitate appears and on adding excess $ NaOH, $ the precipitate dissolves. In this solution zinc exists in the:
Options:
A) both in cafionic and anionic parts
B) there is no zinc left in the solution
C) cationic part
D) anionic part.
Show Answer
Answer:
Correct Answer: D
Solution:
[d] $ Z{{n}^{2+}}+2NaOH\xrightarrow{{}} $ $ Zn{{(OH)}_2}+2N{{a}^{+}} $
$ Zn{{(OH)}_2}+2NaOH\xrightarrow{{}} $ $ Na_2ZnO_2+2H_2O $
$ Na_2ZnO_2\xrightarrow{{}}2N{{a}^{+}}+{{(ZnO_2)}^{2-}} $
BETA
