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2. Is Matter Around  Us Pure 1. For question numbers 1 to 9, two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below : (a) Both A and R are true and R is the correct explanation of the assertion. (b) Both A and R are true but R is not the correct explanation of the assertion.   (c) A is true but R is false. (d) A is false but R is true. 1. Assertion (A) : The air is a compound containing oxygen, nitrogen, argon, carbon dioxide and water vapour in a fixed proportion according to their masses. Reason (R) : A compound is a substance whose composition of the components is fixed Le; they combine together in a fixed ratio according to their masses.   2. Assertion (A) :A solution is a homogeneous mixture of two or more substances. Reason (R) : A solution has a solvent and a solute as its ...