Give ONE chemical test to distinguish between each pair of compounds given below. But -1- yne and but -2-yne; But -1- ene and n- butane – NABTEB QUESTION

1. No simple chemical test to distinguish the two alkynes.

2. But -1- ene decolorizes bromine water, while n- butane does not react with bromine water.

But -1-ene reacts with acidified KmnO4 solution changing it from purple to colourless solution, n- butane does not but-1-ene react with alkaline KMnO4 solution changing it from purple to green solution, n- butane does not.