SATHEE: Transition and InnerTransition Elements

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. $H N O_{3}$

(b) $C u$ metal and conc. $H N O_{3}$

(c) Au metal and $N a C N (a q)$ in the presence of air

(d) Zn metal and $N a O H (a q)$

Show Answer

Solution:

$\underset{Amphoteric}{Z n} + 2 N a O H ⟶ N a_{2} Z n O_{2} + H_{2}$

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Transition and InnerTransition Elements - Result Question 15

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