Question

Which of the following does not involve colligative properties?

Answer 1

Colligative properties are usually used in relation to solutions.
Colligative properties are those properties of solutions, which depend on the concentration of the solutes [molecules, ions, etc.] in the solutions and not on the chemical nature of those chemical species. Examples of colligative properties include: vapour pressure depression, boiling point elevation, osmotic pressure, freezing point depression, etc. 
For the question given above, the correct option is D. This is because the statement is talking about freezing point elevation, which is not part of colligative properties.

Answer 2

Hey there!

The correct answer to your question is:

Option D)
Calcium silicide is added to liquid steel to increase the steel’s ability to freeze.

Hope this helps!
Have a great day (: