EASY
Diploma
IMPORTANT
Earn 100

Identify the direction of movement of electrons and ion flow in the electrolytic cell for the electrolysis of molten aluminium oxide.

Important Questions on Redox Processes

EASY
Diploma
IMPORTANT
State what would be observed at each electrode of the electrolytic cell for the electrolysis of molten aluminium oxide.
EASY
Diploma
IMPORTANT
Discuss, with reference to differences in properties, why aluminium is used to replace iron in many applications.
EASY
Diploma
IMPORTANT

Consider the overall reaction taking place in a voltaic cell.

Ag2Os+Zns+H2Ol2Ags+ZnOH2s

What is the role of zinc in the cell?

EASY
Diploma
IMPORTANT
What happens to bromine when bromate ions, BrO3-, are converted to bromine molecules, Br2?
EASY
Diploma
IMPORTANT

Consider the following reactions of three unknown metals XY and Z.

2XNO3aq+Ys2Xs+YNO32aq

YNO32aq+Zsno reaction

2XNO3aq+Zs2Xs+ZNO32aq

What is the order of increasing reactivity of the metals (least reactive first)?

EASY
Diploma
IMPORTANT

What is the reducing agent in the reaction below?

2MnO4-aq+Br-aq+H2Ol2MnO2s+BrO3-aq+2OH-aq.

EASY
Diploma
IMPORTANT

Which changes could take place at the positive electrode (cathode) in a voltaic cell?

I. Zn2+aq to Zns.

II. Cl2g to Cl-aq.

III. Mgs to Mg2+aq.

EASY
Diploma
IMPORTANT

Metal A is more reactive than metal B. A standard voltaic cell is made as shown figure.

Question Image

Which statement is correct?