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At which oxidation state iron catalyses the reaction between iodide and persulphate ions and acts as a catalyst?

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Important Questions on Solved Chemistry Paper-2

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12th Tamil Nadu Board
IMPORTANT
Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 17 - p-Block Elements-I>Exercise>Q 19
The electronic configuration of chalcogens is :
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12th Tamil Nadu Board
IMPORTANT
Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 17 - Coordination Chemistry>Exercise>Q 37

The IUPAC name of CoONONH35Cl2 is

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12th Tamil Nadu Board
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Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 17 - Solid State>Exercise>Q 46
if ‘a’ stands for the edge length of the cubic system ; sc , bcc, and fcc. Then the ratio of radii of spheres in these systems will be respectively
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12th Tamil Nadu Board
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Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 17 - Electro Chemistry>Exercise>Q 48
The quantity of charge required to obtain one mole of aluminium from Al2O3 is _____.
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12th Tamil Nadu Board
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Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 17 - Surface Chemistry>Exercise>Q 30
The aerosol is a kind of colloid in which
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12th Tamil Nadu Board
IMPORTANT
Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 17 - Hydroxy Compounds And Ethers>Exercise>Q 44
Which of the following alcohols is prepared by acid catalysed hydration of alkenes?
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Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 17 - Carbonyl Compounds And Carboxylic Acids>Exercise>Q 49

The number of sp2 hybridised carbon atoms in

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12th Tamil Nadu Board
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Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 17 - Solved Chemistry Paper-2>Exercise>Q 7
The slope of a graph ln[A]t versus t for a first order reaction is -2.5×10-3s-1. The rate constant for the reaction will be