D and F Block Elements MCQ. We covered all the D and F Block Elements MCQ in this post for free so that you can practice well for the exam.
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MCQ on D and F Block Elements for NEET Students
Find the INCORRECT statement with reference to interstitial compounds.
(A) They are chemically inert.
(B) They are non-stoichiometric and neither typically ionic nor covalent.
(C) They have low melting points than that of the parent metal
(D) They are very hard.
Option c – They have low melting points than that of the parent metal
The INCORRECT statements are (I) All the members of the actinoid series are radioactive. (II) Actinoids form oxocations. (III) Hydroxides of actinoids are less basic than lanthanoids. (IV) Actinoids are placed in period 6.
(A) (I), (II)
(B) (III), (IV)
(C) (I), (III)
(D) (II), (IV)
Option b – (III), (IV)
In which of the following compounds, is the oxidation state of Cr highest?
(A) CrF5
(B) CrO₂
(C) Na₂CrO4
(D) Cr(NO3)3
Option c – Na₂CrO4
All the given statements are CORRECT, EXCEPT ……..
(A) earlier members of the lanthanoid series have chemical reactive similar to that of calcium
(B) when lanthanoids are burnt in air, they form oxides with formula (Ln₂03)
(C) mixed oxides of lanthanoids are employed as catalysts in petroleum cracking
(D) when lanthanoids are treated with water, they liberate oxygen gas
Option d – when lanthanoids are treated with water, they liberate oxygen gas
All the oxides are CORRECTLY matched EXCEPT ……..
(A) CrO : Basic oxide
(B) V₂O5 : Amphoteric oxide
(C) Cr₂O3 : Amphoteric oxide
(D) V₂O3 : Acidic oxide
Option d – V₂O3 : Acidic oxide
Which one of the following statements is INCORRECT when H₂S is passed through acidified K₂Cr₂O7 solution?
(A) A pale yellow precipitate of sulphur IS formed.
(B) The solution turns colorless.
(C) Hydrogen sulphide is oxidized.
(D) Potassium dichromate undergoes reduction.
Option b – The solution turns colorless.
Which of the following is CORRECT about the last four members of the actinoid series?
(A) They frequently exhibit higher oxidation states.
(B) They are non-radioactive.
(C) They generally form compounds in the +3 oxidation state.
(D) They possess completely filled 5f orbitals in their ground state.
Option c – They generally form compounds in the +3 oxidation state.
In chromite ore, the oxidation number of iron and chromium are respectively ……….
(A) +3, +2
(B) +3, +6
(C) +2, +6
(D) +2, +3
Option d – +2, +3
The total number of s-electrons in Ni (atomic number = 28) is ………
(A) 0
(B) 2
(C) 4
(D) 8
Option d – 8
Consider a titration of potassium dichromate solution with acidified Fe(II) salt solution using diphenylamine as an indicator. The number of moles of Fe(II) ion required per mole of dichromate ion is ………..
(A) 3
(B) 4
(C) 5
(D) 6
Option d – 6
In an acidic solution, the number of moles of KMnO4 required to convert one mole of sulphite ion into sulphate ion is ………
(A) 2/5
(B) 5
(C) 4/5
(D) 2
Option a – 2/5
Which of the following is INCORRECT?
(A) Potassium dichromate is used as a primary standard in volumetric analysis.
(B) Sodium dichromate is less soluble in water than potassium dichromate.
(C) Potassium dichromate is used in the leather industry.
(D) Acidified potassium dichromate solution oxidizes tin(II) to tin(IV).
Option b – Sodium dichromate is less soluble in water than potassium dichromate.
Assertion: Mn(II) ion is more stable than Mn(III) ion while Fe(III) ion is more stable than Fe(II) ion. Reason: Both Mn(II) and Fe(III) ions have half-filled d-subshell.
(A) Assertion and Reason are true. The reason is the correct explanation of the Assertion.
(B) Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
(C) The assertion is true, and the Reason is false.
(D) The assertion is false, Reason is true.
Option a – Assertion and Reason are true. The reason is the correct explanation of the Assertion.
(I) Paramagnetic (II) Diamagnetic (III) Tetrahedral geometry (IV) Trigonal pyramidal geometry (V) Green in color (VI) Purple in color Select the CORRECT option, which indicates the properties of manganate ion and permanganate ion.
(A) Manganate ion (I), (III), (V); Permanganate ion – (II), (III), (VI)
(B) Manganate ion (II), (IV), (V) ; – Permanganate ion – (I), (III), (VI)
(C) Manganate ion (I), (IV), (VI) ; Permanganate ion – (II), (III), (V)
(D) Manganate ion (I), (III), (VI) ; Permanganate ion – (II), (III), (VI)
Option a – Manganate ion (I), (III), (V); Permanganate ion – (II), (III), (VI)
The general molecular formula of the product obtained on heating lanthanoids (Ln) with nitrogen is ……….
(A) Ln₂N3
(B) LnN2
(C) Ln3N
(D) LnN
Option d – LnN
Which is the CORRECT statement about dichromate ions?
(A) It has neither Cr-Cr bonds nor 0-0 bonds.
(B) It has one Cr-Cr bond and six 0-0 bonds.
(C) It has no Cr-Cr bond but has six 0-0 bonds.
(D) It has one Cr-Cr bond and seven Cr-O bonds.
Option a – It has neither Cr-Cr bonds nor 0-0 bonds.
Chromite ore (A) is fused with Na₂CO3 in presence of air and the product obtained is dissolved in water and filtered to obtain a yellow solution of compound (B). After treatment of this yellow solution with sulphuric acid, compound (C) can be crystallized from the solution. When compound (C) is treated with KCI, orange crystals of compound (D) crystallize out. Identify compounds (B) and (D) respectively.
(A) Na₂Cr₂O7, K₂CrO4
(B) Na₂CrO4, K₂Cr₂O7
(C) FeCr₂O4, K₂CrO4
(D) Na₂SO4, K₂Cr₂O7
Option b – Na₂CrO4, K₂Cr₂O7
The atomic numbers of eight elements are given below. How many of them are inner transition elements? 29, 59, 68, 74, 89, 96, 102, 104
(A) 2
(B) 3
(C) 4
(D) 5
Option c – 4
Which among the following is expected to have the lowest third ionization enthalpy?
(A) Zn
(B) Mn
(C) Sc
(D) Cr
Option c – Sc
X + dil. H₂SO4 →Y. Y is a colorless, suffocating gas. Y + K₂Cr₂O7 + H₂SO4 →Green coloration of solution Then, X and Y are ………
(A) Na₂SO3, SO₂
(B) NaCl, HCI
(C) Na₂S, H₂S
(D) Na₂CO3, CO₂
Option a – Na₂SO3, SO₂
Which among the following elements belonging to the 5d series has the highest melting point?
(A) Hf
(B) Pt
(C) Os
(D) W
Option d – W
The element that does NOT have completely filled d subshell is …….
(A) Ni
(B) Zn
(C) Cd
(D) Ag
Option a – Ni
KMnO4 acts as an oxidizing agent in an acidic medium. The number of moles of KMnO4 that will be needed to react with 10 mol of sulphide ions in an acidic solution is ………..
(A) 2
(B) 3
(C) 4
(D) 5
Option c – 4
Pyrolusite ore (MnO₂) on heating with KOH in the presence of air gives ……….
(A) K₂MnO4
(B) MnO
(C) KMnO4
(D) Mn₂O7
Option a – K₂MnO4
The number of species that have more than 8 electrons in the 4f subshell among Gd, Lu, Eu, Yb, and Tb is ………. Ce= 58, Eu = 63, Gd = 64, Tb = 65, Lu= 71, Yb = 70
(A) 2
(B) 3
(C) 4
(D) 5
Option b – 3
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