<prompt> Pin code indexof N2O is-1,62,52,63,5  <response>: Ans. is d i.e., 3, 5 GasPin indexOxygen2,5Nitrous oxide3,5Cyclopropane3,6Air1.5Nitrogen1,4Entonox 50 O2 50 N2OSingle central 7Carbon dioxide 7.52,6Carbon dioxide 7.51,6 