, If empirical formula of compound 3 is P 3 Q 4 , then the empirical formula of compound 2 is P 3 Q 5 .

, If empirical formula of compound 3 is P 3 Q 2 , and atomic weight of element P is 20, then the atomic weight of Q is 45.

and If empirical formula of compound 2 is PQ, then the empirical formula of compound 1 is P 5 Q 4 .

. ONE OR MORE THAN ONE of these four option(s) is (are) correct answer(s). • For each question, choose the option(s) corresponding to (all) the correct answer(s). • Answer to each question will be evaluated according to the following marking scheme: Full Marks : +4 ONLY if (all) the correct option(s) is (are) chosen; Partial Marks : +3 If all the four options are correct but ONLY three options are chosen; Partial Marks : +2 If three or more options are correct but ONLY two options are chosen, both of which are correct; Partial Marks : +1 If two or more options are correct but ONLY one option is chosen and it is a correct option; Zero Marks : 0 If unanswered; Negative Marks : -2 In all other cases. To check the principle of multiple proportions, a series of pure binary compounds (P m Q n ) were analyzed and their composition is tabulated below. The correct option(s) is(are) Compound Weight % of P Weight % of Q 1 50 50 2 44.4 55.6 3 40 60 If atomic weight of P and Q are 70 and 35, respectively, then the empirical formula of compound 1 is P 2 Q.