all 6 questions plz solve 25.
26.
27.
A galvanic cell Is set up from a zinc bar weighing
100 gand 1.0 litre of 1.0 M CuS04 solution. How
long would the cell run if it isassumed to deliver a
steady current of 1.0 amp. (Atomic mass of
28.
29.
30.
An electric current is passed through silver
voltameter connected to a water voltameter. The
cathode of the silver voltameter weighed 0,108g.
more at the end of the electrolysis. The
Of oxygen evolved at STP is. :
Zn 65)
(1) 1.1 hr.
(3) 53.6 hr.
(2) 46 hr.
(4) 24.00 hr.
(1) 56 cm3
(3) 5.6 cm3
(5) 22.4 cm3
(2) 550 crn3
(4) 11.2
The electrochemical equivalent Of silver is
0:0011180 g. When an electric current of
0.5 ampere is passed through an aqueous silver
nitrate solution for 200 sec. , the amount of silver
deposited is :
(1) 1.1180 g
(3) 5.590 g
4.5 g of aluminium (at. mass 27 amu) is dewsitd
at cathode from A13• solution by a certain quantity
of electric charge. The volume of hydrogen
produced at STP from bns in solution by the
sarne quantity of electric charge will be —
(4) 0.5590 g
(1) 44.8 L
(3) 22.4 L
(2) 11.2 L
5.6 L
A current Of 9.65 amp. is passed through an
aqueous solution of NaCl using suitable electrodes
for 1000 s. Given that 1 faraday equals 96500
coulombs the arnount of NaOH (mol wt. 40.00)
formed on electrolysis is :
The thermodynamic efficiency of cell is given by -
(1) 2.0g
(3) 4.0 g
(2) 8.0 g
(4) 1.0 g.
(3) -LEE
(4) Zero
