How many coulombs are required to oxidise 1 mol H2O2 to O2 ?
(1) 9.65 X 104 C
(2) 9.3 X 104 C
(3) 1.93 X 105 C
(4) 19.3 X 102 C
The quantity of electricity required to reduce 12.3 g of nitrobenzene to aniline with 50 % current efficiency is:
1. 1 F
2. 0.6 F
3. 0.5 F
4. 1.2 F
Electrolysis of hot aqueous solution of NaCl gives NaClO4 as-
How many faraday are required to obtain 1000 g of sodium perchlorate ?
(1) 66 F
(2) 122.5 F
(3) 15.13 F
(4) 1.86 F
The cell reaction of micro electrochemical cell formed during rusting of iron is:-
1.
2.
3.
4.
Which of the following is an incorrect statement :-
1. Mercury cell is a primary cell providing a constant potential
2. During recharging lead storage cell works as electrolytic cell
3. Galvanised iron does not rust
4. In electrolytic cell reduction occurs at anode and in galvanic cell oxidation takes place at anode
For the cell reaction
the change in free energy at a given temperature is a function of
(1) lnC1
(2) ln
(3) ln (C1 +C2)
(4) lnC2
EMF of the following cell will be zero if
Pt(H2)|H+||H+|(H2)Pt
P1 C1 C2 P2
(1) C1P1 = C2P2
(2) C1P2 = P2C1
(3)
(4) None of these
the emf of Voltaic cell
(1) 1.25 V
(2) -1.75 V
(3) 1.75 V
(4) 4 V
The same amount of electric current is apassed through aqueous solution of MgSO4 and AlCl3. If 2.8 g Mg metal is deposited at amount of Al metal deposited in second cell will be
1. 2.1 g
2. 2.49 g
3. 3.15 g
4. 3.73g
The potential of the following concentration cell at room temperature is-
(1) -0.118V
(2) -0.0591V
(3) 0.118V
(4) 0.0591V