Free Transition Elements MCQs with Answers
531 Transition Elements MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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Read the Transition Elements notesFree MDCAT chapter notes with key terms531 questions · page 19 of 27
- A. Trigonal planar, trigonal pyramidal and three.
- B. tetrahedral, pyramidal and two.
- C. trigonal planar, tetrahedral and three.
- D. linear, pyramidal and three.
Explanation: The geometry around S are trigonal planar, the geometry around N are trigonal pyramidal and the number of resonating structure will be…
Correct answer: Trigonal planar, trigonal pyramidal and three.- A. PtCl4.6NH3
- B. PtCl4.5NH3
- C. PtCl4.4NH3
- D. Equal.
Explanation: Platinium has a coordination number equal to six. The structures of the complexes are,PtCl4.6NH3 ,PtCl4.5NH3 and , PtCl4.4NH3 which…
Correct answer: PtCl4.6NH3- A. 10 and 3.
- B. 1 and 6
- C. 6 and 2.
- D. 6 and 4.
Explanation: [X(SO4)(NH3)5] contains X in +2 oxidation state and the coordination number is 6.
Correct answer: 6 and 2.- A. 3
- B. 6
- C. 5
- D. 4
Explanation: [Cu(NH3)4] [PtCl4] shows [Cu(NH3)3Cl] [PtCl3(NH3)], [Pt(NH3)3Cl] [Cu(NH3)Cl3], [Pt(NH3)4] [CuCl4] [Cu(NH3)4] [PtCl4].
Correct answer: 4- A. [Pt(NH3)2Cl2].
- B. [Pt(NH3)Cl4].
- C. [Pt(en)3]4+
- D. [Pt(en)2Cl2]
Explanation: Structure: Octahedral (d⁶, Pt(IV)).Geometrical Isomerism: Yes, cis- and trans-isomers exist due to the arrangement of Cl ligands relative…
Correct answer: [Pt(en)2Cl2]- A. C4H9Li.
- B. (C2H5)4Pb.
- C. [(C5H5)2Fe].
- D. C2H5-O-Na
Explanation: Compounds in which the carbon or organic groups are directly bonded to metal atoms are known as organometallic compounds.
Correct answer: C2H5-O-Na- A. [Co(NH3)6] [Cr(CN)6] and [Co(CN6)] [Cr(NH3)6].
- B. [Cr(H2O)5Cl]Cl2.H2O and [Cr(H2O)4Cl2]Cl.2H2O.
- C. [Co(NH3)5Br] SO3 and [Cr(NH3)5SO4]Br.
- D. [Pt(NH3)2Cl2] and [Pt(NH3)4] [PtCl4].
Explanation: When both positive and negative ions are complex, coordination isomerism may occur due to the interchange of ligands within the…
Correct answer: [Co(NH3)6] [Cr(CN)6] and [Co(CN6)] [Cr(NH3)6].- A. Co(NH3)4Cl3
- B. Co(NH3)3Cl3
- C. Co(NH3)5Cl3
- D. Co(NH3)6Cl3
Explanation: Werner's theory.[Co(NH3)3Cl3] is non electrolyte. statement of theory: Negative ions satisfy the primary valances, which are generally…
Correct answer: Co(NH3)3Cl3- A. 36
- B. 38
- C. 28
- D. 54
Explanation: Effective atomic no. (EAN) = at. no. of central atom - oxidation state + 2 × (no. of ligands) = 28 - 0 + 2 × 4 = 36.
Correct answer: 36- A. 46
- B. 86
- C. 36
- D. 84
Explanation: EAN = atomic no. of the metal - no. of electron lost in ion formation + no.
Correct answer: 86- A. optionA.
- B. Option B
- C. Option C
- D. Option D
Explanation: Greater the value of stability constant, the stronger is the ligand.
Correct answer: Option B372. Mohr's salt is a:
- A. Simple salt.
- B. Complex salt.
- C. Complex ion.
- D. Double salt.
Explanation: The union of two or more molecules of simple salts, when combined through electrostatic forces of attraction, combine with each other…
Correct answer: Double salt.- A. Al+
- B. H
- C. H-
- D. None.
Explanation: A ligand is a molecule or ion that binds to a metal atom to form a complex ion.
Correct answer: H-- A. Na3AlF6
- B. K2SiF6
- C. K2PtCl6
- D. All
Explanation: A complex anion is an anion that contains a metal atom surrounded by ligands.
Correct answer: K2PtCl6- A. [Co(NH3)4NO2Cl] [(NH3)Cl]
- B. [Co(NH3)5Cl] [Cl(NO2)]
- C. [Co(NH3)5NO2]Cl2
- D. [Co(NH3)5] [(NO2)2Cl2]
Explanation: Because only (C) gives two moles of AgCl with AgNO3 and yields three ions (including two ionizable Cl- ions) in an aqueous…
Correct answer: [Co(NH3)5NO2]Cl2- A. -6
- B. +3
- C. -3
- D. +6
Explanation: The algebraic sum of oxidation no. of all atoms in a complex ion is equal to the charge on that ion,i.e., a + 6 × (-1) = - 3. a = + 3.
Correct answer: +3- A. FeSO4
- B. KCl.MgCl26H2O
- C. Al2(CO3)3
- D. NH4Br.
Explanation: A simple salt is a compound which has been prepared by the combination of two simple ions like Na+ and Cl- ions to form NaCl.
Correct answer: KCl.MgCl26H2O- A. Solution of iron salt does not give blue colour with indicator.
- B. Solution of iron salt gives blue colour with indicator.
- C. No colour before and after with indicator.
- D. Always blue colour before and after
Explanation: At the end point, there is no Fe2+. All iron in Fe3+ hence no blue colour with K3[Fe(CN)6] hence (A).
Correct answer: Solution of iron salt does not give blue colour with indicator.- A. +1.
- B. +3.
- C. -1.
- D. -3.
Explanation: We know that CO is a neutral ligand and K carries a charge of +1. Therefore, the complex can be written as K+ [Co(CO)4]-.
Correct answer: -1.- A. a central metal ion with d8 configuration has two unpaired electrons.
- B. an ion with d6 configuration is diamagnetic in a strong field.
- C. an ion with d5 configuration has one unpaired electron both in weak and strong fields.
- D. in d4, d5, d6 and d7 configurations, weak and strong field complexes have different numbers of unpaired electrons.
Explanation: This statement is fundamentally incorrect because the number of unpaired electrons changes:Weak field: All five electrons are unpaired…
Correct answer: an ion with d5 configuration has one unpaired electron both in weak and strong fields.