D-And F-Block Elements Ques 117
Question: Which of the following dissolves in hot conc. NaOH solution
[CPMT 2004]
Options:
A) Fe
B) Zn
C) Sn
D) Ag
Show Answer
Answer:
Correct Answer: B
Solution:
Zn dissolve in Conc. NaOH due to the formation of Sodium Zincate. $ Zn+2NaOH\to Na_2ZnO_2+H_2 $