MEDIUM
JEE Main
IMPORTANT
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Among Co3+,Ti2+,V2+ and Cr2+ ions, one if used as a reagent cannot liberate H2 from dilute mineral acid solution, its spin-only magnetic moment in gaseous state is _____  B.M. (Nearest integer)

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Important Questions on The d- and f-Block Elements

MEDIUM
JEE Main
IMPORTANT
The spin-only magnetic moment value of M3+ ion (in gaseous state) from the pairs Cr3+/Cr2+,Mn3+/Mn2,Fe3+/Fe2+ and Co3+/Co2+ that has negative standard electrode potential, is_____ B.M.
MEDIUM
JEE Main
IMPORTANT
The dark purple colour of KMnO4 disappears in the titration with oxalic acid in acidic medium. The overall change in the oxidation number of manganese in the reaction is
HARD
JEE Main
IMPORTANT
The spin-only magnetic moment value of the compound with strongest oxidizing ability among MnF4,MnF3 and MnF2 is_____ B.M (nearest integer)
HARD
JEE Main
IMPORTANT

Given below are two statements.

Statement I : O2,Cu2+ and Fe3+ are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field.

Statement II : NaCl and H2O are weakly magnetized in opposite direction to magnetic field.

In the light of the above statements, choose the most appropriate answer form the options given below

MEDIUM
JEE Main
IMPORTANT

Given below are two statements:

Statement I : Iron (III) catalyst, acidified K2Cr2O7 and neutral KMnO4 have the ability to oxidise I- to I2 independently.

Statement II: Manganate ion is paramagnetic in nature and involves - bonding.

In the light of the above statements, choose the correct answer from the options.

MEDIUM
JEE Main
IMPORTANT
In neutral or alkaline solution, MnO4- oxidises thiosulphate to
MEDIUM
JEE Main
IMPORTANT
The oxidation state of manganese in the product obtained in a reaction of potassium permanganate and hydrogen peroxide in basic medium is