The sum of coordination number and oxidation number of the metal M in the complex [M(en)2(C2O4)]Cl (where en is ethylenediamine) is
9
6
7
7
B.
6
Given complex compound is [M(en)2(C2O4)]Cl
Let oxidation number of M is x
therefore, x- 2 - 2 = -1
x = +3
Now, as coordination number is defined as the total number of binding sites attached to the metal.Hence, in the given complex coordination number is 6.
The stability of +1 oxidation state among Al, Ga, In and TI increases in the sequence
Ga<In< Al<Tl
Al<Ga<In<Tl
Tl<In<Ga<Al
Tl<In<Ga<Al
The variation of the boiling point of the hydrogen halides in the order HF > HI > HBr > HCl. What explains the higher boiling point of hydrogen fluoride?
The electronegativity of fluorine is much higher than for other elements in the group
There is strong hydrogen bonding between HF molecules
The bond energy of HF molecules is greater than in other hydrogens halides
The bond energy of HF molecules is greater than in other hydrogens halides
Number of possible isomers for the complex [Co(en)2Cl2]Cl will be
(en =ethylenediamine)
2
1
3
3
The correct statement regarding defects in the crystalline solid is
Schottky defects have no effect on the density of crystalline solid
Frenkel defect decreases the density of crystalline solids
Frenkel defect is a dislocation defect
Frenkel defect is a dislocation defect
Assuming complete ionisation, same moles of which of the following compounds will require the least amount of acidified KMnO4 for complete oxidation?
FeSO4
FeSO3
FeC2O4
FeC2O4
The name of complex ion, [Fe(CN)6]3- is
hexacyanoiron (III) ion
hexacyanitoferrate (III) ion
tricyanoferrate (III) ion
tricyanoferrate (III) ion
In the extraction of copper from its sulphide ore, the metal finally obtained by the reduction of cuprous oxide with
Iron (II) sulphide
Carbon monoxide
Copper (I) sulphide
Copper (I) sulphide
The rate of constant of the reaction A → B is 0.6 x 10-3 mole per second. If the concentration of A is 5 M then concentration of B after 20 min is
1.08 M
3.60 M
0.36 M
0.36 M