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

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

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

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?

There are three liquids A, B and C, all having different densities and different boiling points. Liquids A and C are organic in nature whereas liquid B is considered to be inorganic. When liquids A and B are put together in a container, they form a single layer. On the other hand, when liquids B and C are mixed, they form two separate layers:

(a) Which process will you use to separate a mixture of A and B?

(b) Which method will you use to separate a mixture of B and C?

(c) Name the liquids which would behave like (i) a (ii) B and (iii) C.