S Block Elements Question 298
Question: Concentrated aqueous sodium hydroxide can separate mixture of
[MNR 1995]
Options:
A) $ A{{l}^{3+}} $ and $ S{{n}^{2+}} $
B) $ A{{l}^{3+}} $ and $ F{{e}^{3+}} $
C) $ A{{l}^{3+}} $ and $ Z{{n}^{2+}} $
D) $ Z{{n}^{2+}} $ and $ P{{b}^{2+}} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ NaOH+A{{l}^{+3}}\to \underset{(SolubleinNaOH)}{\mathop{\underset{Sod\text{. metaaluminate}}{\mathop{NaAlO_2}}}} $
$ NaOH+F{{e}^{+3}}\to $ No reaction (Insoluble in NaOH)
BETA
