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Saturday, 31 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 25 June 2022, Shift 1, Chemistry Q88

Question 88 of 90 in this shift, Chemistry question 28 of 30, Section B.

For a given chemical reaction γ1A+γ2B→γ3C+γ4D\gamma_1 \mathrm{A} + \gamma_2 \mathrm{B} \rightarrow \gamma_3 \mathrm{C} + \gamma_4 \mathrm{D} Concentration of C changes from 10 mmol dm−3\mathrm{dm^{-3}} to 20 mmol dm−3\mathrm{dm^{-3}} in 10 seconds. Rate of appearance of D is 1.5 times the rate of disappearance of B which is twice the rate of disappearance A. The rate of appearance of D has been experimentally determined to be 9 mmol dm−3 s−1\mathrm{dm^{-3}\ s^{-1}}. Therefore the rate of reaction is __________ mmol dm−3 s−1\mathrm{dm^{-3}\ s^{-1}}. (Nearest Integer)

Official answer

1

NTA final key.

Chapter
Chemical Kinetics
Topic
Rate Laws
Idea tested
Rate and Stoichiometry

Same idea in other shifts

Asked 7× in all
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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.