The idea of froth floatation method came from a person X and this method is related to the process Y of ores. X and Y, respectively, are :

An organic compound 'A' is oxidizod with Na₂O₂ followed by boiling with HNO₃. The resultant solution is then treated with ammonium molybdate to yield a yellow precipitate.
Based on above observation, the element present in the given compound is:

The electrons are more likely to be found :

But-2-ene on reaction with alkaline KMnO₄ at elevated temperature followed by acidification will give :