Hi CUET aspirants, Welcome to Amans Maths Blogs (AMBIPi). In this post, you will get CUET Chemistry Mock Test d and f Block Elements AMBIPi. This CUET Chemistry Mock Test is of the Chemistry chapter d and f Block Elements. Before solving these CUET Chemistry questions, you must read CUET Chemistry Notes, which helps you to revise CUET Chemistry Syllabus and then you must need to solve CUET Previous Years Questions Papers.
CUET Chemistry Mock Test
CUET Chemistry Question No: 1
Which of the following element does not have (n – 1) d10ns2 electronic configuration?
Option A : Zn
Option B : Cd
Option C : Hg
Option D : Cu
Show/Hide Answer Key
Option D: Cu
The electronic configurations of Zn, Cd and Hg are represented by the general formula (n-1)d10 ns2. The orbitals in these elements are completely filled in the ground state as well as in their common oxidation states.
Cu has electronic configuration 3d10 4s1. Thus, Cu does not have (n-1)d10 ns2 electronic configuration
CUET Exam Chemistry Question No: 2
The ground state electronic configuration of neutral titanium atom is
Option A : [Ar] 4s2 4p2
Option B : [Ar] 3d2 4s2
Option C : [Ar] 4s2 p1x p1 y
Option D : [Ar5] 3d5
Show/Hide Answer Key
Option B: [Ar] 3d2 4s2
CUET UG Chemistry Question No: 3
The third ionisation enthalpy is minimum form
Option A : Mn
Option B : Ni
Option C : Co
Option D : Cr
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Option D: Cr
CUET Domain Subject Chemistry Question No: 4
Which element can have oxidation state from 4 to 6?
Option A : Fe
Option B : Mg
Option C : Co
Option D : Cr
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Option D: Cr
Oxidation state of alkaline earth metal (i.e. Mg) is fixed and equal to (+)2. Oxidation state of d-block elements can vary, i.e. for Fe and Co it is as follows:
Oxidation state of Co = (+) 2 to (+) 4 and oxidation state of Fe = (+) 2 to (+) 6, but (+) 6 is less stable. Oxidation state of Cr = (+) 2 to (+) 6, where (+) 6 state is more stable.
CUET BSc Chemistry Question No: 5
Magnetic moment of a transition metal ion is found to be 3.87 BM. The number of unpaired electrons present in it is
Option A : 2
Option B : 3
Option C : 4
Option D : 5
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Option B: 3
CUET Entrance Exam Chemistry Question No: 6
Which of the following aqueous solutions will be coloured?
Option A : Zn(NO3)2
Option B : LiNO3
Option C : CoNO3
Option D : HgCI2
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Option C: CoNO3
Only Co+ because of the presence of unpaired electrons in d-orbitals show d-d transition and, hence it is coloured.
CUET Exam Question No: 7
Which of the following alloys contain Cu and Zn?
Option A : Brass
Option B : Bronze
Option C : Bell metal
Option D : All of these
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Option A: Brass
CUET Chemistry Practice Questions No: 8
Acidified potassium dichromate oxidises
Option A : iodides to iodine
Option B : sulphides to sulphur
Option C : tin (IV) to tin (II)
Option D : Both (a) and (b)
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Option D: Both (a) and (b)
Acidified potassium dichromate oxidises iodides to iodine, sulphides to sulphur, tin(II) to tin(IV), iron(II) salts to iron (III).
CUET Chemistry Sample Paper Question No: 9
Which of the following can react with K2 Cr2 O7 ?
Option A : SO-2 3
Option B : CO-23
Option C : SO-24
Option D : NO–3
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Option A: SO-2 3
CUET Chemistry Mock Test Question No: 10
Dichromates are generally prepared by the fusion of chromite ore with
Option A : sodium carbonate
Option B : potassium carbonate
Option C : Both (a) and (b)
Option D : Neither (a) nor (b)
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Option C: Both (a) and (b)
Dichromates are generally prepared from chromate which in turn are obtained by the fusion of chromite ore (Fe Cr2O4) with sodium or potassium carbonate in free access of air. 4 Fe Cr2 O4 + 8 Na2CO3 + 702 → 8 Na2 CrO4 + 2Fe2O3 + 8CO2
2Na2CrO4 + 2H+ → Na2Cr2O7 + 2Na+ H2O
CUET Chemistry Question No: 11
Permanganate ion (MnO–4) − is dark purple coloured though Mn is in + 7 oxidation state with d0 configuration. This is due to
Option A : d-d transition
Option B : charge transfer from metal to ligand
Option C : charge transfer from ligand to metal
Option D : All of the above
Show/Hide Answer Key
Option C: charge transfer from ligand to metal
In MnO4–,
x+ (+2)4 = -1
⇒ x = +7
25Mn+7 = [Ar], no unpaired electrons.
Thus, it will not show d-d transition. It is dark purple coloured due to charge transfer from ligand to metal.
CUET Exam Chemistry Question No: 12
Name the gas that can readily decolourise acidified
KMnO4 solution.
Option A : CO2
Option B : SO2
Option C : NO2
Option D : P2O5
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Option B: SO2
CUET UG Chemistry Question No: 13
The green manganate and purple permanganate are respectively
Option A : paramagnetic, diamagnetic
Option B : diamagnetic, paramagnetic
Option C : paramagnetic, paramagnetic
Option D : diamagnetic, diamagnetic
Show/Hide Answer Key
Option A: paramagnetic, diamagnetic
The manganate and permanganate ions are tetrahedral. Here, the π-bonding takes place by overlap of p-orbitals of oxygen with d-orbitals of manganese. The green manganate is paramagnetic because of one unpaired electron but the purple permanganate is diamagnetic due to charge transfer.
CUET Domain Subject Chemistry Question No: 14
The most common lanthanoid among the following is
Option A : lanthanum
Option B : cerium
Option C : promethium
Option D : plutonium
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Option B: cerium
Lanthanum is a d-block element, whereas plutonium is an actinoid. Both cerium and promethium are lanthanoids. But cerium is a common lanthanoid because it occurs naturally, whereas Pm does not occur naturally and is radioactive.
CUET BSc Chemistry Question No: 15
Which of the following pairs has the same size?
Option A : Zn2+,Hf4+
Option B : Fe2+,Ni2+
Option C : Zr4+,Ti4+
Option D : Zr4+ ,Hf4+
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Option D: Zr4+ ,Hf4+
CUET Entrance Exam Chemistry Question No: 16
A man made white silvery metal, radioactive in nature, has strong tendency to form oxocations and complexes. It is used as a nuclear fuel in atomic reactor. This metal is a
Option A : actinide
Option B : lanthanide
Option C : representative element
Option D : transition metal
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Option A: actinide
Actinide is a man-made white silvery metal, radioactive in nature has a strong tendency to form oxocations and complexes.
CUET Exam Question No: 17
All the actinoids are believed to have the electronic configuration of
Option A : 6s2
Option B : 7s2
Option C : 5 f14
Option D : 5 d10
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Option B: 7s2
CUET Chemistry Practice Questions No: 18
What will be the most common oxidation state shown
by the actinoids?
Option A : -3
Option B : +3
Option C : -4
Option D : +4
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Option B: +3
CUET Chemistry Sample Paper Question No: 19
Which of the following elements shows maximum number of different oxidation states in its compounds?
Option A : Eu
Option B : La
Option C : Gd
Option D : Am
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Option D: Am
CUET Chemistry Mock Test Question No: 20
The actinoids resemble the lanthanoids in having more compounds in
Option A : +3 state
Option B : +4 state
Option C : +5 state
Option D : +2 state
Show/Hide Answer Key
Option A: +3 state
