In dry cell container is filled with mixture which is in ……….form.
a) granular
b) paste
c) solution
d) none of these
Dry cell is made waterproofed with ……….
a) zinc
b) copper
c) iron
d) wax
The voltage produced by dry cell is …………
a) 1.25V
b) 12.5V
c) 7.5V
d) 120V
Electrochemical cells are used to power …….
a) radios
b) automobiles
c) flashlights
d) all of these
Electroplating is done for the purpose of ……
a) durability
b) beauty
c) repair
d) all of these
Sodium metal was first discovered by ………
a) Sir Humphrey Davey
b) Berzilius
c) Boyle
d) Volta
