In Nelson cell hydrogen gas is produced at …
a) anode
b) cathode
c) a & b both
d) none of these
Continuous eating away of a metal by the environment or surrounding is called ……..
a) pollution
b) rusting
c) corrosion
d) b & c both
Corrosion is a …….. process.
a) non-spontaneous
b) spontaneous
c) a & b both
d) none of these
In colored films ……… layers of silver halides are present.
a) two
b) three
c) four
d) five
In colored films, layers of silver halides are of ……. color.
a) red
b) green
c) blue light
d) all of these
The corrosion of iron is commonly known as
a) decomposition
b) rusting
c) tunneling
d) none of these
