The reaction, 10FeSO4 + 2KMnO4 + 8H2SO4 → 2MnSO4 + 5Fe(SO4)3 + K2SO4 + 8H2O is an example of reaction of
disproportionation
intermolecular redox
intramolecular redox
None of these
Standard electrode potential data are useful for understanding the suitability of an oxidant in a redox titration. Some half cell reactions and their standard potentials are given below
Identify the incorrect statement regarding the quantitative estimation of gaseous Fe(NO3)2.
MnO can be used in aqueous HCl
Cr2O can be used in aqueous HCl
MnO can be used in aqueous H2SO4
Cr2O can be used in aqueous H2SO4
Oxidation number of chlorine atom in Ca(OCl)Cl is
-1
+1, -1
0
-1, 0
B.
+1, -1
In CaOCl2, according to the calculation, the oxidation states of both chlorine atoms are zero. But, it is their average oxidation state. In actual practice, the structure of CaOCl2 is ClO-Ca-Cl.
Thus, in CaOCl2, two types of anions ClO- and Cl- are present. Out of these, the oxidation state of Cl is - 1, but the oxidation state of chlorine in OCl- ion s + 1 as oxygen is more electronegative than chlorine, hence oxidation state of oxygen remains -2 while oxidation state of chlorine becomes +1.
The value for Cr, Mn, Fe and Co are -0.41, +0.77 and +1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?
Cr
Mn
Fe
Co
The oxidation numbers of phosphorus in Ba(H2PO2) and xenon in Na4XeO6 respectively are
+3 and +4
+2 and +6
+1 and +8
-1 and -6
Balance the following equation by chossing the correct options:
xKNO3 + yC12H22O11 → pN2 + qCO2 + rH2O + sK2CO3
x | y | p | q | r | s |
36 | 55 | 24 | 24 | 5 | 48 |
x | y | p | q | r | s |
48 | 5 | 24 | 36 | 55 | 24 |
x | y | p | q | r | s |
24 | 24 | 55 | 48 | 5 |
x | y | p | q | r | s |
24 | 48 | 36 | 24 | 5 | 55 |