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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- A. Sc has ionic chloride.
- B. Sc readily forms oxidation state of +3.
- C. Compounds containing the Sc3+ ion are always colored.
- D. Sc has ionic chloride and Sc readily forms oxidation state of +3
Explanation: Scandium is the first element of the 3d block of transition metals, which means it has a partially filled d orbital.
Correct answer: Sc has ionic chloride and Sc readily forms oxidation state of +3- A. W
- B. Pt
- C. Hg
- D. Mn
Explanation: The transition metals have variable oxidation states due to the presence of unpaired electrons in their d orbitals.
Correct answer: Mn- A. Ti, V
- B. Cr, Cu
- C. Cr, Mn
- D. Ni, Co
Explanation: Two elements "C" and "Cu" have different electronic configuration.24Cr [Ar] 3d5 4s124Cu [Ar] 3d10 4s1
Correct answer: Cr, Cu64. Which of the following is correct formula for general electronic configuration of d-block elements?
- A. (n-1)d1-10 ns1-2
- B. (n-1)d1-5 ns1-2
- C. (n-1)d1-4 ns1-2
- D. (n-1)d1-10 ns2
Explanation: d-block elements have a general electronic configuration of (n-1)d1-10 ns1-2.
Correct answer: (n-1)d1-10 ns1-265. Which of the following is the correct electronic configuration of gold (atomic number of Au = 79)?
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: A is the correct option. Total is 79. d and s orbitals being partially filled are more stable.
Correct answer: Option A- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The electronic configuration of copper is [Ar] 3d10 4s1.
Correct answer: Option B- A. Sc-----Zn
- B. La-----Hf
- C. Y-----Cd
- D. Ce-----Lu
Explanation: 3d-series elements range from Sc to Zn which include Scandium(21), Tin(22), Vanadium(23), Chromium(24), Manganese(25), Iron(26)…
Correct answer: Sc-----Zn68. Pair of transition elements which show abnormal electronic configuration in the first 3d-series are:
- A. Cr and Ni
- B. Fe and Ni
- C. Cr and Cu
- D. Cu and Co
Explanation: The correct option is C) Cr and Cu. Both Chromium (Cr) and Copper (Cu) are transition elements that show abnormal electronic…
Correct answer: Cr and Cu- A. Coinage metals
- B. Noble metals
- C. Transition metals
- D. Alkali metals
Explanation: Transition metals are a group of chemical elements that have a partially filled d subshell.
Correct answer: Transition metals- A. 2
- B. 3
- C. 5
- D. 7
Explanation: The most common oxidation state for group 3B elements is +3. All elements in this group can form compounds in which they have an oxidation…
Correct answer: 3- A. Sc
- B. Y
- C. La
- D. Cd
Explanation: The first series of transition elements starts from scandium (Sc) with atomic number 21 and ends with copper (Cu) with atomic number 29.
Correct answer: Sc- 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: In a half-filled d5 system, the electrons are delocalized over the five d orbitals.
Correct answer: Because of extra stability of half-filled d5 system- A. IIB and IIIB
- B. IB and IVB
- C. IVB and VB
- D. VIB and VIIB
Explanation: Non-typical transition elements are those elements in the d-block that have completely filled d orbitals.
Correct answer: IIB and IIIB- A. Cr
- B. Fe
- C. Cu
- D. Zn
Explanation: The correct option is D) Zn (Zinc). Zinc is not considered a typical transition element due to its full d-subshell in its most stable…
Correct answer: Zn- A. Right of the periodic table
- B. Left of the periodic table
- C. Bottom of periodic table
- D. Between s and p block elements
Explanation: The d-block elements lie in between s- and p-block elements, i.e., these are positioned in the middle of the period table.
Correct answer: Between s and p block elements- A. Mn
- B. Zn
- C. Cu
- D. Ag
Explanation: Option A: Manganese is a typical transition element. It is a hard, gray white metal and has multiple oxidation states, including +2, +4…
Correct answer: Zn- A. Sc,Zn
- B. Ni,Hg
- C. Mn,Cd
- D. Cu,Cr
Explanation: The pair of elements that shows an abnormal electron configuration are Cu (copper) and Cr (chromium).
Correct answer: Cu,Cr- A. 40
- B. 23
- C. 37
- D. 30
Explanation: The number of elements present in the d-block of the periodic table is 40.
Correct answer: 40- A. Coinage metals
- B. Noble metals
- C. Transition metals
- D. Alkali metals
Explanation: Option C is correct since d-block and f-block elements are called transition elements.
Correct answer: Transition metals- A. MnO4-
- B. CrO42-
- C. Cr2O72-
- D. MnO42-
Explanation: The correct answer is MnO42-, where manganese is in the +6 oxidation state.
Correct answer: MnO42-