At room temperature why the reaction between oxalic acid and acidified `KMnO_4` is very slow?

Why is the conversion of ethanol to ethanoic acid and oxidation reaction?

Ammonia gas is produced by the reaction between nitrogen gas and hydrogen gas at a temperature of 550°C and at 200 atmosphoric pressure in the presence of iron as a catalyst. Represent this reaction by a balanced chemical equation.

What happens when: What happens when: Oxalic acid react with KMnO_4 in acidic medium

Two parallel Co-axial Coils of equal radius R and- numbers of turn N carrying equal currents I in same direction.are separated by a distance | R. Show that the magnetic field intensity B on the axis around the mid point between the coils is uniform over a very small distance as compared to R and is given by- B = (4/5)^(3/2) (mu_0IN)/R