What is a disproportionation reaction? Give one example.
Redox Reactions
Original Khojo Papers practice question — not from a past board paper.
MnO4− + 5Fe2+ + 8H+ → Mn2+ + 5Fe3+ + 4H2O
No citable source has been recorded for this record. Treat it as practice material, not as fact.
The permanganate half-reaction gains five electrons and the iron half-reaction loses one, so the iron half must be multiplied by five before the two are added.
From the same topic and chapter, at a similar level.
What is a disproportionation reaction? Give one example.
Redox Reactions
Find the oxidation number of sulphur in H2SO4, in Na2S2O3 and in SO2.
Redox Reactions
Find the oxidation number of manganese in KMnO4 and of chromium in K2Cr2O7.
Redox Reactions
Define oxidation and reduction in terms of electrons, and identify the oxidising agent in Zn + CuSO4 → ZnSO4 + Cu.
Redox Reactions
State Hund's rule and the Aufbau principle.
Structure of Atom
A compound contains 40% carbon, 6.7% hydrogen and 53.3% oxygen. Its molar mass is 180 g. Find its empirical and molecular formulae.
Some Basic Concepts of Chemistry