Welcome to your D and F block elements
1.
Among which of the following pairs of ions, the lower oxidation state in aqueous solution is more stable than the other?
2.
The number of incomplete orbitals in inner transition elements is?
3.
The aqueous solution containing which one of the following ions will be colourless?
4.
Which of the following is a highly corrosive salt?
5.
A complex of Co³⁺ with formula CoCl₂·6NH₃ gives 3 ions in solution. How many Cl⁻ ions satisfy secondary valency?
6.
Which of the following metal complexes has central metal atom with zero valency?
7.
Heteropoly acids are formed by?
8.
Which one forms complex with CN⁻ having coordination number 2?
9.
Order correct for Fe³⁺, Fe²⁺ and Fe⁺?
10.
Which pair of ions is colourless?
11.
Which pair has same paramagnetic moment?
12.
Hardness of transition metals is due to?
13.
Among series with 3d² configuration:
14.
Metal used for cutting steel (edge maintained)?
15.
Electrons involved in oxidation by KMnO₄ in basic medium?
16.
For which lanthanide +2 and +3 oxidation states common?
17.
Lightest transition element?
18.
Ferrous ion changes to X⁺ ion on reacting with acidified H₂O₂. Number of d-electrons in X and its magnetic moment (B.M.) are?
19.
Which characteristic of transition metals is associated with catalytic activity?
20.
Most common oxidation states of Ce are
21.
Actinoids show more oxidation states than lanthanoids because
22.
Which ion exhibits colour in aqueous solution?
23.
Lanthanoid contraction caused due to
24.
Which ion is colourless in aqueous solution?
25.
Which ion exhibits highest magnetic moment?
26.
Which is diamagnetic?
27.
Which pair has same electronic configuration?
28.
Lanthanide contraction responsible for
29.
Oxidation state of Fe in product when ferrocyanide treated with H₂O₂?
30.
5f-level successively filled in
31.
Which reacts with conc. H₂SO₄?
32.
Which transition metal is synthetic?
33.
Lowest melting point?
34.
Element with highest number of oxidation states?
35.
The oxidation number of cobalt in K₃[Co(NO₂)₆] is:
36.
Main cause of lanthanide contraction?
37.
Zn²⁺ + NaOH gives white ppt that dissolves in excess NaOH. Zinc exists in:
38.
Number of ions formed from FeSO₄·(NH₄)₂SO₄·6H₂O?
39.
Number of ions formed from FeSO₄·(NH₄)₂SO₄·6H₂O?
40.
Ruthenium carbonyl is:
41.
Incorrect statement about Cerium:
42.
Metal found in gunmetal, monel metal, constantan alloys
43.
Basic character of transition metal monoxides order:
44.
Two 1st series ions with largest unpaired e⁻ & magnetic moment:
