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BITSAT Chemistry Chemical Kinetics 2024 BITSAT 2024 (Memory Based Paper 3)

BITSAT Chemistry Question (2024) — Solution

Question

For the reaction 2 SO _2+ O _2 2 SO _3, the rate of disappearance of O _2 is 2 10^ -4 ~mol ~L ^ -1 s ^ -1 . The rate appearance of SO _3 is

Options

  1. A. 2 10^ -4 ~mol ~L ^ -1 ~s ^ -1
  2. B. 4 10^ -4 ~mol ~L ^ -1 ~s ^ -1
  3. C. 1 10^ -1 ~mol ~L ^ -1 ~s ^ -1
  4. D. 6 10^ -4 ~mol ~L ^ -1 ~s ^ -1

Answer

B. 4 10^ -4 ~mol ~L ^ -1 ~s ^ -1

Step-by-step solution

2 SO _2+ O _2 2 SO _3 Rate of reaction =- 1 2 d [ SO _2 ] d t =- d [ O _2 ] dt = 1 2 d [ SO _3 ] d t Rate of appearance of SO _3, aligned d [ SO _3 ] d t & =2 [ -d [ O _2 ] d t ]=2 (2 10^ -4 ) \\ & =4 10^ -4 ~mol ~L ^ -1 ~s ^ -1 aligned

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