Chemical Kinetics

JEE Main 2024 (Online) 29th January Morning ShiftNumericalEasy📈 Topic in 22% papers+4

Ques. 1JEE Main 2024, 29 January (Morning Shift)

For a reaction taking place in three steps at same temperature, overall rate constant K = K1 K2K3. If Ea1, Ea2 and Ea3 are 40, 50 and 60 kJ/mol respectively, the overall Ea is kJ/mol.

Answer

Solution

Arrhenius: K = A e-Ea/RT for each step

K = K1 K2K3 = A1 A2A3 e-(Ea1 + Ea2 - Ea3)/RT

⇒ Ea = Ea1 + Ea2 - Ea3 = 40 + 50 - 60 = 30 kJ/mol

Answer: 30

Keep practising — Chemical Kinetics

Ques. 2JEE Main 2024, 29 January (Evening Shift)

The half-life of radioisotope bromine - 82 is 36 hours. The fraction which remains after one day is 10-2. (Given antilog 0.2006 = 1.587)

Ques. 3JEE Main 2024, 27 January (Morning Shift)

Consider the following data for the given reaction 2HI(g) H2(g) + I2(g) [figure] The order of the reaction is .

Ques. 4JEE Main 2024, 27 January (Evening Shift)

Time required for completion of 99.9% of a First order reaction is times of half life (t1/2) of the reaction.

All Chemical Kinetics PYQs →

PDFDownload Chemical Kinetics PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇

All JEE Main Chemistry chapters

Physical ChemistrySome Basic Concepts of Chemistry Structure of Atom States of Matter Thermodynamics Equilibrium Redox Reactions Solid State Solutions Electrochemistry Chemical Kinetics

Inorganic ChemistryClassification of Elements and Periodicity in Properties Chemical Bonding and Molecular Structure s-Block Elements p-Block Elements (Group 13 & 14)Environmental Chemistry General Principles of Isolation of Elements p-Block Elements (Group 15–18)d- and f-Block Elements Coordination Compounds

Organic ChemistryOrganic Chemistry – Some Basic Principles and Techniques Isomerism Hydrocarbons Haloalkanes and Haloarenes Alcohols, Phenols and Ethers Aldehydes, Ketones and Carboxylic Acids Amines Biomolecules Principles Related to Practical Chemistry