KCET 2026 | d and f Block Elements Question 1 | Chemistry

The highest oxidation state of manganese in fluoride is $+4$ ($\text{MnF}_4$), but the highest oxidation state in oxides is $+7$ ($\text{Mn}_2\text{O}_7$), because

Fluorine is more electronegative than oxygen

Fluorine possesses d-orbitals

Fluorine stabilises lower oxidation state

In covalent compounds, fluorine can form single bond only, while oxygen forms double bond

KCET 2026

MCQ (Single Correct Answer)

-0

Which of the following will not act as an oxidising agent?

$\text{CrO}_3$

$\text{MoO}_3$

$\text{CrO}_4^{2-}$

$\text{Cr}_2\text{O}_7^{2-}$

KCET 2025

MCQ (Single Correct Answer)

-0

In the following pairs, the one in which both transition metal ions are colourless is

$\mathrm{Sc}^{3+}, \mathrm{Zn}^{2+}$

$\mathrm{V}^{2+}, \mathrm{Ti}^{3+}$

$\mathrm{Zn}^{2+}, \mathrm{Mn}^{2+}$

$\mathrm{Ti}^{4+}, \mathrm{Cu}^{2+}$

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Chemistry

Physical Chemistry

Some Basic Concepts of Chemistry Atomic Structure States of Matter Thermodynamics Chemical Equilibrium Ionic Equilibrium Liquid Solution Redox Reactions Surface Chemistry Solid State Electrochemistry Chemical Kinetics Nuclear Chemistry

Inorganic Chemistry

Periodic Table and Periodicity Chemical Bonding and Molecular Structure Metallurgy Hydrogen and It's Compounds s-Block Elements p-Block Elements d and f Block Elements Coordination Compounds Salt Analysis Environmental Chemistry

Organic Chemistry

IUPAC Nomenclatures General Organic Chemistry Isomerism Hydrocarbons Haloalkanes and Haloarenes Alcohol, Phenols and Ethers Aldehyde and Ketone Carboxylic Acids and Its Derivatives Compounds Containing Nitrogen Polymers Biomolecules Chemistry in Everyday Life Practical Organic Chemistry