Question

1. How will you separate a mixture of common salt and iron nails?
2.How are thresher and combine helpful to the farmers?
3.By using woollen yarn a lady knitted a sweater.Can this change be reversed?​

Answer 1

firstly using magnet to remove iron nails this can be done by handpicking method also then by the method of sublimation separate camphor from the salt then pour water in common salt and then evaporate the water for separating common salt from water.