The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a per — JEE Mains Chemistry Past Papers Chemistry Question
Question
The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood stream is 2K2Cr2O7 + 8H2SO4 + 3C2H6O 2Cr2(SO4)3 + 3C2H4O2 + 2K2SO4 + 11H2O If the rate of appreatance of Cr2(SO4) is 2.67 mol min–1 at a particular time, the rate of disapprearance of C2H6O at the same time is ________ mol min–1. (Nearest integer) | JEE MAIN-2021 | DATE : 27-08-2021 (SHIFT-1) | PAPER-1 | OFFICIAL PAPER | CHEMISTRY PAGE # 9 'okl fo'ys"k.k midj.k] ftldk iz;ksx O;fDr ds jDr esa mifLFkr ,sYdksgkWy dk Lrj Kkr djus esa gksrk gS] esa gksus okyh vfHkfØ;k gS% 2K2Cr2O7 + 8H2SO4 + 3C2H6O 2Cr2(SO4)3 + 3C2H4O2 + 2K2SO4 + 11H2O ;fn Cr2(SO4) ds izxV gksus dh nj ,d fo'ks"k le; 2.67 mol min–1 gS] rks mlh le; C2H6O ds yqIr gksu dh nj gS ________ mol min–1. ¼fudVre iw.kk±d esa½
💡 Solution & Explanation
1 dt ] O H C [d 2 = 1 dt ] ) SO ( Cr [d 4 3 1 (Rate of disappearance of C2H6O) = 1 (Rate of disappearance of Cr2(SO4)3) Rate of disappearance of C2H6O = 3 min / mol . = 4.005 mol/min