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JEE Main202127 Aug 2021Morning ShiftChemistrySome Basic Concepts of ChemistryActual

The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood stream is 2 K 2 Cr 2 O 7 + 8 H 2 SO 4 + 3 C 2 H 6 O → 2 Cr 2 SO 4 3 + 3 C 2 H 4 O 2 + 2 K 2 SO 4 + 11 H 2 O If the rate of appearance of Cr 2 SO 4 3 is 2 . 67 mol min - 1 at a particular time, the rate of disappearance of C 2 H 6 O at the same time is mol min - 1 . (Nearest integer)

Correct answer

0

Step-by-step solution

1 3 - d C 2 H 6 O dt = 1 2 d Cr 2 SO 4 3 dt 1 3 (Rate of disappearance of C 2 H 6 O = 1 2 (Rate of disappearance of Cr 2 SO 4 3 Rate of disappearance of C 2 H 6 O = 2 . 67   mol / min × 3 2 = 4 . 005   mol / min

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