1.
During electrolysis of water, which gas is produced at the cathode?
A
Oxygen
B
Chlorine
C
Hydrogen
D
Nitrogen
Answer and explanation
Correct Answer: C — Hydrogen
At the cathode (negative electrode), reduction occurs: . So hydrogen is produced.
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During electrolysis of water, which gas is produced at the cathode?
Oxygen
Chlorine
Hydrogen
Nitrogen
At the cathode (negative electrode), reduction occurs: . So hydrogen is produced.
Which property of a magnet is used in an electric motor?
Attraction between like poles
Force on a current-carrying conductor in a magnetic field
Magnetic induction
Self-inductance
Electric motors work on the principle that a current-carrying conductor placed in a magnetic field experiences a force (Fleming's left-hand rule).