Worksheetstransition elements (2)
Total questions: 10
Worksheet time: 19mins
Which of the following configurations indicate an ion of a transition element:
(Kr)5s24d8
(Kr)5s1 4d9
(Kr)5s0 4d9
(Kr)5s1 4d8
Which of the following oxidation state is not allowed for Ni
+3
+4
+2
+5
How many unpaired electrons are present in Mn7+ ?
4
7
0
3
The complex ion which has three paired d electrons in the central metal atom is
[Fe(CN)6]3-
[Co(NH3)6]3+
[Ni(H2O)]4+
[MnO4]-
Which of the following pairs resist the reactions with variable chemicals such as oxidizing agents as well as bases
Fe2O3 and FeO
FeO and Mn2O3
Fe2O3 and MnO
Mn2O3 and MnO
which of the following dose not react with (KMnO4) oxidizing agent
Fe2+
Cr2+
Mn2+
V5+
Which of the following is true about the oxidation state of transition metals?
The oxidation state increases with increase in atomic number
The oxidation state increases with increase in atomic number & reaches a maximum in the middle and then decreases
The oxidation state decreases with increase in atomic number
The oxidation state decreases with increase in atomic number, reaches a minimum at the middle and then increases
Which of the following pairs have the same electronic configuration?
Mn3+ ,Fe3+
Mn2+ ,Fe3+
Mn2+ ,Fe2+
Mn2+ ,Fe4+
the correct symbol of potassium dichromate is
K3CrO4
K3Cr3O7
KCrO7
K2Cr2O7
the correct symbol of aluminium sulfate is
AlSO4
Al2SO4
Al2(SO4 )3
Al(SO4)3
