CBSE
What amount of Cl2 gas liberated at anode, if 1 ampere current is passed for 30 minute from NaCl solution ?
0.66 mol
0.33 mol
0.66 g
0.33 g
How long it will take to deposit 1.0 g of chromium when a current of 1.25 A flows through a solution of chromium (III) sulphate ? (Molar mass of Cr = 52)
1.24 min
1.24 h
1.24 s
None of these
Which of the following formula is applicable for weak electrolyte:
All of these
What is the electrode potential (in V) of the following electrode at 25°C ?
Ni2+ (0.1 M) | Ni(s)
(Standard reaction potential of Ni2+ | Ni is -0.25V, )
-0.28V
-0.34V
-0.82V
-0.22V
The compounds formed at anode in the electrolysis of an aqueous solution of potassium acetate, are
C2H6 and CO2
C2H4 and CO2
CH4 and H2
CH4 and CO2
A 35% solution LiCl was electrolysed by using a 2.5A current for 0.8h.Assuming thecurrent efficiency of 90%. The mass of LiOHproduced at the end of electrolysis.
[Atomic mass of Li=7] is:
1.61 g
2.71 g
4.02 g
3.70 g
EMF or hydrogen electrode in terms of pH at 1 atm pressure is
EH2 =
EH2 =
EH2 =
EH2 = -0.0591 pH
How much chlorine will be liberated on passing one ampere current for 30 min. through NaCl solution ?
0.66 mole
0.33 mole
0.66 g
0.33 g
0.165 V
0750 V
0.421 V
0.012 V
Assuming that constant current is delivered. How many kW-h of electricity can be produced by the reaction of 1.0 mole Zn with Cu ion in a Daniel cell in which all the concentration remains 1.00 M.
(Given E=0.76V),
0.069 kW-h
0.074 kW-h
0.080 kW-h
0.059 kW-h