Electrochemistry

Electrons always flow from

• cathode to anode

• anode to cathode

Oxidation occurs at the

• anode

• cathode

Electrons are gained at the

• anode

• cathode

When water is electrolysed, the gas collected at cathode, is

• sulfur

• oxygen

• hydrogen

• carbon dioxide

• A

• B

• C

• D

• 1,2 and 3

• 1 and 2 only

• 1 only

• 3 only

• A

• B

• C

• D

• A

• B

• C

• D

If Al is above Co in the activity series of metals, which of the following will occur if Al metal is put into a solution of cobalt nitrate?

• a redox reaction takes place
• the Al strip dissolves
• the Al strip becomes coated with cobalt
• all of the above

Which direction do the electrons flow in wire X and which metal is oxidised?

• A
• B
• C
• D