NTA Abhyas NEET2020ChemistryChemical KineticsPractice
For a reaction 1 2 A → 2 B , the rate of disappearance of 'A' is related to the rate of appearance of 'B' by the expression-
Options
- A- d A d t = 1 2 d [ B ] d t
- B- d A d t = 1 4 d [ B ] d t
- C- d A d t = d [ B ] d t
- D- d A d t = 4 d [ B ] d t
Correct answer
B. - d A d t = 1 4 d [ B ] d t
Step-by-step solution
1 2 A → 2 B Remember for a A → b B - 1 a d A d t = 1 b d [ B ] d t = Rate of reaction For the given reaction - 2 d A d t = 1 2 d [ B ] d t =rate of reaction Rate of disappearance of A = - d A d t = 1 2 × 2 d [ B ] d t = 1 4 d [ B ] d t