Salt will melt first.
Sugar. Salt often slows down the process of melting, so sugar is what would melt it faster.
Yes. You could try melting it over a Bunsen burner - the sugar will melt readily whereas the salt will not. You could also try dissolving the substance in alcohol. The salt will dissolve only very slightly, but the sugar will dissolve readily.
Salt
sugar
Salt, obviously.
salt
oil with heat from a stove works or without heat you can u an acid like bleach
Sugar. You can caramelize sugar on a home stove quite easily. Salt's melting temperature, by contrast, is orders of magnitude higher
== == Salt lowers the freezing point of water by 32 degrees. If salt is sprinkled onto ice, it causes the ice to melt by a heat transfer. Out of the substances listed, salt would melt ice most efficiently.
Salt
Salt
No, because you can't boil sugar. It will decompose beforehand. However, you can distinguish sugar and salt by heating them. Sugar will melt and decompose before 300 Celsius. Salt will not melt until ~800 Celsius