Ch-10 Electrochemistry

The electrolyte KOH is used in cell:

In the reaction 2Fe + 3Cl2 ------> 2FeCIз:

Oxidation state of hydrogen in CaH2 is:

Cu metal can be purified in electrolytic cell by making the impure Cu as:

Fuel cells convert chemical energy into:

Nelson's cell and Down's cell are example of:

The oxidation number of Cr in K2Cr2O7 is:

The electrolyte used in fuel cell is:

Electrode potential of S.H.E arbitrarily taken in volts is:

Which one is not an electrolyte:

E.M.f of Zn-Cu cell is:

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

Percentage of H2SO4 used in lead accumulator is:

Cathode in NICAD cell is:

The extraction of Na-metal by electrolysis of fused NaCl is carried out in:

Sulphur has the highest state in:

In rusting of iron shown by the reaction 4Fe + 302→2Fe2O3, Iron is:

When aqueous NaCl is electrolyzed, which of the following get discharged at cathode:

A decrease in oxidation number is called:

Oxidation state of carbon in glucose (C6H1206) is:

Galvanic cells which cannot be re-charged are called:

Consider the following reaction: Zn + Cu2+ → Zn2+ + Cu With reference to the above, which one of the following is the correct statement?

Reduction never involves:

Which of the following has same oxidation state in all its compounds:

The overall positive reaction potential value predicts that process is:

In which of the following compounds oxidation number of sulphur is negative:

Which of the following is a primary cell:

Which of the following is a reducing agent in following reaction: P + HNO3 -----> H3PO4 + NO + H2O

When brine solution is electrolysed which of the following ions get discharged at anode:

The change in the oxidation state of nitrogen in the following reaction is: Cu + HNO3 -----> Cu(NO3)2 + NO2 + H2O