See the following redox reaction
A2+ + 2e- → A; E° = +0.34 V
A+ + e- → A; E° = +0.52 V
Which ion is expected to be stable?
A2+
A+
Both can form stable complexes
None can form stable complexes
A metal reacts with dil acid and liberates hydrogen. If the reduction potential of hydrogen be considered zero, the reduction potential of that metal will be
equal to its oxidation potential
positive
Zero
negative
Acidic dichromate ion reacts with hydrogen peroxide to give deep blue colour. This is due to the formation of
CrO(O)2
CrO5
Bith (a) and (b)
None of (a) and (b)
The coordination number and oxidation number X in the following compound [X(SO4)(NH3)5]Cl will be
10 and 3
2 and 6
6 and 3
6 and 4
A galvanic cell is constructed using the redox reaction,
it is represented as
Pt | H2 (g) | HCl (sol)|| AgNO3 (sol) | Ag
Ag | AgCl (s) | KCl (sol) || HCl (sol), H2 (g) | Pt
Pt | H2 (g) | KCl (sol) || AgCl (s) | Ag
Pt | H2 (g), HCl (sol) || AgCl (s) | Ag
When sulphur dioxide is passed in an acidified K2Cr2O7 solution, the oxidation state of sulphur is changed from
+4 to 0
+4 to +2
+ 4 to +6
+6 to +4
For the decomposition of a compound AB at 600 K, the following data were obtained
[AB] mol dm-3 | Rate of decomposition of AB in mol dm-3 |
0.20 | 2.75 × 10-8 |
0.40 | 11.0 × 10-8 |
0.60 | 24.75 × 10-8 |
The order for the decomposition of AB is
1.5
0
1
2
The oxidation state of fe in the brown ring complex : [Fe(H2O)5NO]SO4 is
+3
0
+2
+1
D.
+1
Let the oxidation state of Fe in [Fe(H2O)5NO]SO4 is x:
x + 0 + 1 = 2
x = +1
Here, NO exists as nitrosyl ion (NO+).
A miscible mixture of C6H6 + CHCl3 can be separated by
sublimation
distillation
filtration
crystallisation