sblock Elements - Result Question 52
3. The metal that gives hydrogen gas upon treatment with both acid as well as base is
(a) magnesium
(b) mercury
(c) zinc
(d) iron
(2019 Main, 12 April I)
Show Answer
Answer:
Correct Answer: 3. (c)
Solution:
- Metal that gives hydrogen gas upon treatment with both acid as well as base is zinc. Hence, it is amphoteric in nature.
Reactions involved are as follows:
$Zn+$ Dil. $NaOH \longrightarrow Na _2 ZnO _2+H _2 \uparrow$
$Zn+2 HCl$ (dil.) $\longrightarrow ZnCl _2+H _2 \uparrow$
BETA
