One of the following does not undergo sublimation. This one is :

You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture?

The best way to recover sugar form an aqueous sugar solution is :

Which one of the following scrap metal cannot be separated by magnetic separation?

The liquid air has three components X, Y and Z whose boiling points are : -186C, -183C and -196C, respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed up slowly:

(a) Which component will be collected from near the bottom of the fraction distillation column? Why?

(b) Which component will be collected from the top part of the fractional distillation column? Why?

(c) Which component will be collected from the middle part of the fractional distillation column? Why?

(d) What could the component X, Y and Z be?