Transition and InnerTransition Elements - Result Question 15
####16. Which of the following combination will produce $H _2$ gas?
(2017 Adv.)
(a) Fe metal and conc. $HNO _3$
(b) $Cu$ metal and conc. $HNO _3$
(c) Au metal and $NaCN(a q)$ in the presence of air
(d) Zn metal and $NaOH(a q)$
Show Answer
Solution:
- $\underset{\text { Amphoteric }}{Zn}+2 NaOH \longrightarrow Na _2 ZnO _2+H _2$
