electrochem

Question 1

The highest reduction potential in the electrochemical series is of F2 and its value is:

Answer 1

+2.87 V

Question 2

To balance chemical equation by ion-electron method in the basic media we add

Answer 2

we add the double number of OH– ions to balance the oxygen atoms.

Question 3

Oxidizing power of an element depends upon its:

Answer 3

electrode potential. The electrode potential shows its tendency to give and accept electrons.

Question 4

Electrolysis is the process in which a chemical reaction takes place at the expense of:

Answer 4

Electrical energy

electrical energy is converted to chemical energy.

Question 5

Coinage metals (Cu, Ag and Au) are the least reactive because they have:

Answer 5

Positive reduction potential

Question 5

As temperature increases in electrolytic cell

Answer 5

At high temperature, metallic conduction decreases due to increase in resistance and electrolytic conduction increases due to increased energy of ions.

Question 5

To balance oxygen in ion electron method in acidic solution we add:

Answer 5

● In acid solutions use H2O to balance O and H+ to balance H.

Question 6

Function of salt bridge is to

Answer 6

Salt bridge prevents accumulation of positive charge in anode & accumulation of negative charges in cathode.

Question 7

the common product at both electrodes in lead storage battery is

Answer 7

PbSO4

Question 8

what type of electrolytes are the strongest?

Answer 8

group 1 & 2 elements
and nitrates

Question 9

the cathode in lead storage battery is made of

Answer 9

lead oxide

Question 10

oxidation no of Hydrogen in metal hydrides

Answer 10

-1