Please select a subject first
Advertisements
Advertisements
Write the atomic numbers of transuranium elements.
Concept: Postactinoid Elements
Why is Sc3+ colourless while Ti3+ coloured? (Atomic number Sc = 21, Ti =22)
Concept: General Properties of the Transition Elements (D-block)
What is the geometry of chromate ion?
- Tetrahedral
- Octahedral
- Trigonal planer
- Linear
Concept: D-block Elements >> Some Important Compounds of Transition Elements
Why do interstitial compounds have higher melting points than corresponding pure metals?
Concept: General Properties of the Transition Elements (D-block)
What is the molecular formula of chromyl chloride?
(A) CrO2Cl2
(B) CrOCl2
(C) CrCl3
(D) Cr2OCl2
Concept: D-block Elements >> Some Important Compounds of Transition Elements
What is the position of iron (Z = 26) in periodic table?
Concept: Position in the Periodic Table - d-block Elements
Explain why is Fe3+ more stable than Fe2+?
Concept: General Properties of the Transition Elements (D-block)
What is the action of acidified potassium dichromate on - SO2
Concept: D-block Elements >> Some Important Compounds of Transition Elements
ln which pair highest oxidation states of transition metals are found:
Concept: General Properties of the Transition Elements (D-block)
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
