1 |
The over all positive value for the reaction potential predicts that process is energetically. |
Not feasible
Feasible
Impossible
No indication
|
2 |
Cell potential depends upon |
Temperature
Concentration of ions
Nature of electrolyte
All of above
|
3 |
The difference of potential of two electrodes when concentration of solution is 1 M each at 25 oC and 1 atmosphere is called. |
Electrode potential
Standard cell potential
Cell reaction
Cell voltage
|
4 |
Standard hydrogen electrode has an arbitrarily fixed potential |
0.00 volts
1.00 volt
0.10 volt
None of these
|
5 |
In Daniel cell, if salt bridge is removed between the two half cells, the voltage. |
Drops to zero
Does not changes
Increases gradually
Increases rapidly
|
6 |
A cell in which electric current is produced as a result of spontaneous redox reaction is called. |
Electrolytic cell
Galvanic cell
Half cell reaction
Down's cell
|
7 |
Alkali and alkaline earth metal are usually obtained by |
Decomposition of their carbonates
By heating their hydroxide
electrolysis of molten metal oxides
Electrolysis of molten metal halides
|
8 |
In electrolysis of aqueous NaCl, Cl-ions are. |
Oxidized at anode
Oxidized at cathode
Reduced at cathode
Neither oxidized nor reduced
|
9 |
Electrolysis is used for |
Electroplating
Refining of copper
Manufacture of caustic soda
All of the above
|
10 |
In a electrolytic cell the electrons flow from |
Cathode to anode
Anode to cathode
From cathode to anode or opposite, depending upon the nature of electrolyte
All of the above
|
11 |
When aqueous NaCl is electrolyzed, which of the following ions gas discharged at anode. |
Cl-
OH-
Na+
H+
|
12 |
The cell in which a non spontaneous redox reaction takes place as a result of electricity is known as. |
Voltaic cell
Denial cell
dry Cell
Electrolytic cell
|
13 |
The cell in which a non spontaneous redox reaction takes place as a result of electricity is known as. |
Voltaic cell
Denial cell
dry Cell
Electrolytic cell
|
14 |
In which of the following changes, nitrogen in reduced. |
NH3 to NO
NH3 to NO3
N2 to NH3
N-3 to N2
|
15 |
What is oxidation state of chlorine in Ca(ClO3)2 |
+1
+3
+5
+7
|
16 |
In which compound oxidation state of chlorine is +5 |
NaCl
HOCl
NaClO3
NaClO2
|
17 |
In which compound the oxidation number of Mw is +6 |
KMnO4
K2MnO4
MnO2
MnO
|