IMAT 21 Q 51 (chemistry)

guys in this Q, option 1, i just wanna make sure that y H+ is 2 times greater than that of X because in the balanced equation we get 2 moles of H on the right and 2 on the left, right???
please correct me if i am wrong

Yes! It will be 2x greater instead of 4x greater because the volume dissolved in X is half than Y.