For an elementary parallel reaction:
Initially only 3 moles of R are present. Total No. of mines of and at the end of reaction are:
3
1.5
4.5
4
1 moke of R will form 2 moles of P and 2 mols of Q.
So after completion of reaction when of R converted to P and Q , then
Study 40% syllabus and score up to 100% marks in JEE