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.
Last updated
Read the Transition Elements notesFree MDCAT chapter notes with key terms531 questions · page 15 of 27
- A. Anion
- B. Cation
- C. Ligand
- D. Acid
Explanation: A ligand is a specie that donates electrons to the central metal ion forming a dative covalent bond.
Correct answer: Ligand- A. Ligand field theory
- B. Crystal field theory
- C. Molecular orbital theory
- D. Both A and B
Explanation: Option C : In molecular orbital theory, electrons in a molecule are not assigned to individual chemical bonds between atoms but are…
Correct answer: Both A and B- A. Because of high melting point
- B. Because d-electrons of the outer shell take part in bonding
- C. Because s-electrons of the outer shell take part in bonding
- D. Both s and d electrons take part in bonding
Explanation: Metallic bonding is a type of chemical bonding that arises from electrostatic attractive forces between conduction electrons in the form…
Correct answer: Both s and d electrons take part in bonding- A. Activation
- B. Enamelling
- C. Corrosion
- D. Coating
Explanation: Option A : The process where something is prepared or excited for a subsequent reaction.
Correct answer: Corrosion- A. Potassium tetra cyano recuperate
- B. Coordination number is 2
- C. The ligand is positively charged
- D. Central atom is present in the anionic sphere
Explanation: The following compound is an atom with the lowest subscript in the molecular formula and the atom that can form the most bonds in a…
Correct answer: Central atom is present in the anionic sphere- A. Na
- B. Co
- C. Ba
- D. Ra
Explanation: Transition elements (transition metals) have partially filled d orbitals.
Correct answer: Co- A. 0
- B. 8
- C. 6
- D. 4
Explanation: Let 'x' be the oxidation number of 'Ni' in Ni(CO)4.Since the overall charge of the complex is 0, the sum of the oxidation states of all…
Correct answer: 0- A. Zn
- B. Mg
- C. H
- D. All of these
Explanation: Hydrogen is the only element that is small enough to fit into the interstices of transition metals.
Correct answer: H- A. Orbitals of f-subshell
- B. Orbitals of d-subshell
- C. Orbitals of p-subshell
- D. Both Options A and B are correct
Explanation: Transition elements are d and f block elements, i.e. their valence shell configuration ends at the d or f block.
Correct answer: Both Options A and B are correct- A. CaSiO3
- B. Na2SiO3
- C. Ca3(PO4)2
- D. MnSiO3
Explanation: Option A) CaSiO3, also known as calcium silicate, is not typically used as a fertilizer, but it is used in construction materials and…
Correct answer: Ca3(PO4)2- A. 2
- B. 1
- C. 3
- D. 0
Explanation: Reason: Scandium has multiple oxidation states but the most common one is +3.
Correct answer: 3- A. Transition elements
- B. Typical transition elements
- C. Outer transition elements
- D. Inner transition elements
Explanation: The elements in which d or f orbitals are in completion are called d and f block elements collectively called transition elements.
Correct answer: Transition elements293. What is the general trend of melting and boiling point of transition elements along the period?
- A. Increases from left to right
- B. Decreases from left to right
- C. Increases up to middle then decreases
- D. Decreases up to middle than increases
Explanation: Melting and boiling points of transition elements along a period are directly proportional to the number of unpaired electrons.
Correct answer: Increases up to middle then decreases- A. s electrons
- B. Unpaired electrons
- C. Paired electrons
- D. Outer d electrons
Explanation: Option B is correct as paramagnetism (the ability of a material to be weakly attracted to a magnet due to its magnetic field, which…
Correct answer: Unpaired electrons- A. Because it is transition element
- B. Because it shows different oxidation states
- C. Because of extra stability of half filled d5 system
- D. Because it is typical transition element
Explanation: The correct answer is: Because of the extra stability of the half-filled d5 system.
Correct answer: Because of extra stability of half filled d5 system- A. 2
- B. 3
- C. 5
- D. 7
Explanation: They can lose 1 electron from the valence d-orbital and 2 from the s-orbital.
Correct answer: 3- A. Cr
- B. Fe
- C. V
- D. Zn
Explanation: Zinc has a complete subshell. The electronic configuration of zinc is[ Ar] 3d¹⁰ 4s² so all the orbitals are filled.
Correct answer: Zn- A. Rare earth elements
- B. Outer transition elements
- C. Non-typical elements
- D. Typical transition elements
Explanation: Lanthanides and actinides because of their geometrical properties are typically dispersed on earths surface and that is why they are…
Correct answer: Rare earth elements- A. 2
- B. 4
- C. 6
- D. 7
Explanation: The coordination number of Pt in [PtCl(NO2)(NH3)4] is 6 because this compound has six ligands attached to the central Pt atom: one…
Correct answer: 6- A. Electric field
- B. Paired valence electrons
- C. Magnetic moment
- D. None of these
Explanation: This option is correct because the magnetic moment is the magnetic strength and orientation of a magnet object that produces a magnetic…
Correct answer: Magnetic moment