how will you separate the mixture of salt, talcum powder and sugar crystals?
You can use sieving to separate talcum powder. Then, for the separation of sugar and salt, kindly refer to the following link:
https://www.meritnation.com/ask-answer/question/how-will-u-separate-the-mixture-of-sugar-and-salt/is-matter-around-us-pure/2864511
https://www.meritnation.com/ask-answer/question/how-will-u-separate-the-mixture-of-sugar-and-salt/is-matter-around-us-pure/2864511