question_answer 47)

  You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without testing?

Answer:

  There are many ways by which we can differentiate between sugar and salt without testing Dissolve salt and sugar separately in alcohol, sugar will be dissolved in it while salt will not be dissolved. (ii) Heat these salts separately, sugar will melt readily while salt will not. (iii) Dissolve these two separately in water. Salt solution will conduct electricity due to the presence of Nation and ion while sugar solution will be a non-conductor. So, simply test a drop of the solution with an ohmmeter and you can immediately tell the difference.