EASY
11th CBSE
IMPORTANT
Earn 100

Consider the following relations for EMF of an electrochemical cell

(i) EMF of cell=(Oxidation potential of anode)-(Reduction potential of cathode)
(ii) EMF of cell=(Oxidation potential of anode)+(Reduction potential of cathode)
(iii) EMF of cell=(Reduction potential of anode)+(Reduction potential of anode)
(iv) EMF of cell=(Oxidation potential of anode)-(Oxidation potential of cathode)

Which of the above relations are correct?

50% studentsanswered this correctly

Important Questions on Redox Reactions

EASY
11th CBSE
IMPORTANT
Two electrochemical cells, Zn | Zn2+ || Cu2+| Cu and Fe | Fe2+ || Cu2+| Cu are connected in series. What will be the net e.m.f. of the cell at 25°C ?

Given: Zn2+| Zn=-0.76 V,Cu2+| Cu =+0.34 V, Fe2+| Fe=-0.41 V

MEDIUM
11th CBSE
IMPORTANT
The emf of the cell involving the following reaction, 2Ag++H22Ag+2H+ is 0.80 volt. The standard oxidation potential of silver electrode is
MEDIUM
11th CBSE
IMPORTANT
The standard oxidation potentials Zn, Cu, Ag and Ni electrodes are  +0.76, -0.34, -0.80 and +0.25 V respectively. Which of the following reaction will provide maximum voltage?
EASY
11th CBSE
IMPORTANT

Consider the redox reaction, 2 S2O32-+I2S4O62-+2 I-

HARD
11th CBSE
IMPORTANT

Which of the following statements about the following reactions are wrong?

2 Cu2O s+ Cu2S s6 Cu s +SO2 g

HARD
11th CBSE
IMPORTANT
For the reaction:
I-+ClO3-+H2SO4Cl-+HSO4-+I2
The correct statement s in the balanced equation is/are
HARD
11th CBSE
IMPORTANT
Which of the following act both as oxidising as well as reducing agents?
 
HARD
11th CBSE
IMPORTANT
Which of the following substances undergo disproportionation reactions under basic medium?