WorksheetsTransition elements
Total questions: 50
Worksheet time: 25mins
Why is zinc not considered a transition metal?
Zinc is not a transition metal because it gains two 4s electrons to give a 2+ion with full d subshell levels.
Zinc is not a transition metal because it loses four 4s electrons to give a 4+ion with full d subshell levels.
Zinc is not a transition metal because it loses two 4s electrons to give a 2+ion with full d subshell levels.
Zinc is not a transition metal because it gains two 4d electrons to give a 2+ion with full d subshell levels.
The transition elements form a ________ of about 30 Metals in the________ of the Periodic Table.
Block & catalysts
Block & Middle
Catalysts & Coloured
High & Middle
Which of the following d-block elements is not a transition element?
Iron
Zinc
Titanium
Chromium
What is the highest oxidation state of manganese in it's compounds?
+8
+7
+6
+5
Which of the following best explains the action of a transition element as homogeneous catalyst?
It decreases the enthalpy of reaction
It exhibits a variable oxidation states
It supplies energy to increase the rate of effective collision
It supplies electrons to facilitate adsorption through the formation of temporary bonds
Zn2+ ions form a white precipitate, Zn(OH)2, with an aqueous solution of ammonia. The white precipitate dissolves when a NH4Cl solution is added to it. Which statement explains the observation?
NH4+ ions decrease the concentration of OH- ions in the solution
NH4+ ions increase the solubility product of Zn(OH)2
NH3 molecule is a stronger ligand than OH- ions
A soluble ZnCl2 compound is formed
Which of the followings is a transition element?
Sc
Fe
Zn
Ca
Which of the following is not a feature of Transition Element?
there is a huge change of atomic radii across the period
can form complex
usually have higher melting points comparing s-block elements
have variable oxidation state
What is the oxidation state of Cu?
0
+2
+3
+4
Which type of isomerism does it have?
Functional Group isomerism
Optical isomerism
Structural isomerism
Geometrical isomerism
Density of transition metals is greater than the density of the Group 1 and 2 metals.
True
false
Which of the following properties about transition elements is incorrect?
Transition metals have variable oxidation state.
They are the only elements that can form coloured ions in aqueous solution.
Transition elements are good catalyst.
They are the only elements that can form complexes.
Cobalt has a proton number of 27. Choose the correct electronic configuration for Co4+.
[Ar]3d34s2
[Ar]3d7
[Ar]3d74s2
[Ar]3d5
Arrange the melting point of manganese, magnesium and potassium in increasing order.
K<Mg<Mn
Mn<K<Mg
Mn<Mg<K
Mg<Mn<K
what type of transition element can be found in this solution?
Cu
Mn
Fe
Cr
What is the general electronic configuration of 3d elements?
[Ar] 3d1-10 4s2
[Ar] 3d1-14 4s2
[Ar] 4d1-14 4s2
[Ar] 3d1-10 4s2
which of the following transition metal is soft?
Mn
Co
Zn
Cr
The ionization enthalpies of Transitional elements is
greater than s- block elements
less than p - block elements
Greater than s- block but less than p- block elements
highest in the periodic table
The atomic radii of first row transition elements
gradually increases from left to right
gradually decreases from left to right
does not change due to presence in the same period
shows unpredictable trend
What are typical oxidation state for Sc?
-3
+3
-1
+1
Electron configuration for Ti is [Ar]4s13d5.
Right
Wrong
What is the coordination number?
[Fe(H2O)6 ]Cl2
1
2
4
6
d-block elements loses first elecrton(s) from...
3p
3s
3d
4s
In general the electronic configuration of d-block elements is
(n-1)d1–10 ns1
(n-1)d1–10 ns2
(n-1)d 0–10 ns1–2
(n-1)d 1–10 ns 0–2
Which has the highest melting point in 1st row transition metals ?
Cr
Fe
Co
Mn
Second and the third d series exhibit similar radii (e.g., Zr 160 pm, Hf 159 pm). It is due to
d-d electron transition
inert pair effect
lanthanoid contraction
hydrogen bonding
The transition element which does not exhibit variable
oxidation states is
Zn
Sc
Ti
Cu
The electronic configuration of Cr ( Z=24 ) is
3d5 4s1
3d6 4s0
3d5 4s0
3d4 4s2
In the following ions , which one will have the highest value of Magnetic Moment ?
Sc3+
Mn2+
Cu2+
Zn2+
Which one is NOT colorless ?
Sc3+
Ti4+
Ni2+
Zn2+
2Cu+ → Cu2+ + Cu
This is an example of
comproportionation
synproportionation
proportionation
disproportionation
The transition metals and their compounds are known for their catalytic activity. This activity is ascribed to their ability
to form complexes
to form interstitial compounds
to form multiple bonding with oxygen
to adopt multiple oxidation states and to form complexes.
The magnetic moment (in BM ) of a divalent ion (Z =25) in aqueous solution will be
√63
√35
√25
√45
The formula and colour of chromate are respectively
CrO42- and orange
CrO42- and yellow
Cr2O72- and orange
CrO42- and purple
What is NOT true in respect of dichromate ?
it consists of two tetrahedra sharing one corner with Cr–O–Cr bond angle of 90°
it is orange in aqueous solution
generally prepared from chromate
Potassium dichromate is a very important chemical used in leather industry
Which of the following statements regarding KMnO4 is NOT true ?
it is purple in colour
its color is due to ligand-to-metal charge transfer
it is prepared by the alkaline oxidative fusion of MnO2 followed by the electrolytic oxidation
it is isostructural with KClO3
