What are the fundamental components of matter?

In the fractional distillation of crude petroleum,which of the following statements is correct?

Which of the following substances sublimes upon heating?

One sample of atmospheric air is found to have $0.03\%$ of carbon dioxide and another sample $0.04\%$. This is evidence that

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ $A$ mixture contains benzoic acid and naphthalene. The pure benzoic acid can be separated out by the use of benzene.
Reason $R:$ Benzoic acid is soluble in hot water.
In the light of the above statements,choose the most appropriate answer from the options given below.

The best method for the separation of naphthalene and benzoic acid from their mixture is