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Question
Chemistry
Which of the following combination will produce H2 gas?
Q. Which of the following combination will produce
H
2
gas?
2789
240
JEE Advanced
JEE Advanced 2017
The d-and f-Block Elements
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A
F
e
metal and conc.
H
N
O
3
B
C
u
metal and conc.
H
N
O
3
C
Z
n
metal and
N
a
O
H
(
a
q
)
D
A
u
metal and
N
a
C
N
(
a
q
)
in the presence of air
Solution:
Z
n
+
2
N
a
O
H
⟶
N
a
2
Z
n
O
2
+
H
2
↑