Question

how a mixture of sugar and salt can be separated​

Answer 1

Since sugar, unlike salt, is soluble in alcohol and liquid paraffin, you can use ethanol to separate it.

Some things you can use are petroleum spirit or pure paraffin. (Gasoline would kind of work, but you would need a lot of it to dissolve even a little bit of sugar)

Method #1 (not edible)

Add ethanol ( or whichever you choose) into the mixture
Use a filter to separate the salt from mix
Evaporate the ethanol/petroleum spirit -sugar mix to get the sugar by itself
Done!
Please keep in mind that the method above is only for if you are not eating the final products.

If you want to eat it after separating, the only way I know of will have to sacrifice the sugar.

Method #2 (edible)

Put the mixture (do not add water) into a pot or pan and put it on a stove
Turn the stove to the highest heat for about half an hour. The sugar should burn away or turn into ash.
Add water to the ash and salt mixture (add at least enough to dissolve the salt)
Filter out the ash from the saltwater
Evaporate the salt water until only salt is left
Done!
Hope this helps!

Answer 2

Answer:

Sugar can dissolve in alcohol but salt cannot. So we can add the mixture in alcohol and filter it and sugar alcohol and salt will be left at the end.