Mention which property of the substances mentioned will help you sort them into different groups:- a) salt, sugar
b) a piece of granite, rocksalt

salt and rocksalt so why don't u sub to niko omilana and help the biggest movement on yt the NDL

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.