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Calculate magnetic moment of `Fe_((aq))^(2+) ion (Z=26).`
Concept: General Properties of the Transition Elements (D-block)
An antifriction alloy made up of antimony with tin and copper, which is extensively used in machine bearings is called _______.
(A) Duralumin
(B) Babbitt metal
(C) Spiegeleisen
(D) Amalgam
Concept: General Properties of the Transition Elements (D-block)
Which one of the following ions is coloured?
Concept: General Properties of the Transition Elements (D-block)
Draw the structure of the chromate ion.
Concept: D-block Elements >> Some Important Compounds of Transition Elements
What is effective atomic number of Fe (z = 26) in [Fe(CN)6]4-?
(a) 12
(b) 30
(c) 26
(d) 36
Concept: Electronic Configurations of the D-block Elements
NF3 is possible, but NF5 is not. Why?
Concept: General Properties of the Transition Elements (D-block)
Write observed electronic configuration of elements from first transition series having half
filled d-orbitals.
Concept: D-block Elements >> Some Important Compounds of Transition Elements
What is the action of acidified potassium dichromate on - KI
Concept: D-block Elements >> Some Important Compounds of Transition Elements
Baeyer’s reagent is -'
(a) acidified potassium dichromate
(b) alkaline potassium dichromate
(c) alkaline potassium permanganate
(d) acidified potassium permanganate
Concept: D-block Elements >> General Indroduction
Write balanced chemical equations for the conversion of `CrO_4^(2-)` to `Cr_2O_7^(2-)` in acidic medium and `Cr_2O_7^(2-)` to `CrO_4^(2-)`
in basic medium.
Concept: General Properties of the Transition Elements (D-block)
Oxidation states of scandium are ___________.
Concept: D-block Elements >> General Indroduction
How is potassium dichromate prepared from chrome iron ore?
Concept: General Properties of the Transition Elements (D-block)
Explain the position of actinoids in the periodic table.
What is the action of sulphur on lanthanoids? Calculate the magnetic moment of divalent ion in aqueous solution it its atomic number is 24.
Concept: D-block Elements >> General Indroduction
What are 'd' and 'f' block elements?
Concept: D-block Elements >> General Indroduction
Why do the d-block elements form coloured compounds?
Concept: D-block Elements >> Some Important Compounds of Transition Elements
The compounds of \[\ce{Ti^4+}\] ions are colourless due to ______.
Concept: General Properties of the Transition Elements (D-block)
What are f-block elements?
Concept: F-block Elements >> General Indroduction
What are chemical twins? Write ‘two’ examples.
Concept: F-block Elements >> The Lanthanoids
What are lanthanoids?
Concept: F-block Elements >> The Lanthanoids
Which among the following pairs of elements is 'not' an example of chemical twins?
Concept: F-block Elements >> The Lanthanoids
