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. Cu+2
- B. Ni+2
- C. Fe+2
- D. Mn+2
Explanation: Charge on the central metal ion: In general, the greater the charge density on the central ion, the greater the stability of its…
Correct answer: Cu+2- A. Cu+Zn+Ni
- B. Cu+Ag+Ni
- C. Cu+Sn+Zn+Pb
- D. Al+Cu+Mg+Mn
Explanation: German silver basically doesn't contain silver in it, so it might be a bit confusing its comp is 60% copper, 20% zinc, and 20% nickelThe…
Correct answer: Cu+Zn+Ni- A. Ferric hexa cyano ferrate (i)
- B. Iron (III) hesa cyano ferrate (II)
- C. Sodium hexa cyano ferrate (III)
- D. Both (A) & (B)
Explanation: Opt A Prussian blue.Opt B Dark red to Dark purple to Dark blue powder to crystaline.Opt C Sodium ferrocyanide is an odorless yellow solid.
Correct answer: Ferric hexa cyano ferrate (i)- A. (n-1) d1-10 na2
- B. (n-1)d1-10(n-1)s0-2
- C. (n-1)d1-10ns0-2
- D. nd1-10ns0-2
Explanation: The formula for calculating the required electronic configuration is (n-1)d1-10, ns1-2. Hence, only option C is correct.
Correct answer: (n-1)d1-10ns0-2- A. Number of ligands
- B. Hybridization of central metal
- C. Oxidation state of central metal
- D. Number of chelating agents
Explanation: The number of ligands affects the coordination number and overall stability of the complex.
Correct answer: Hybridization of central metal346. Chelate means:
- A. Bidentate
- B. lon
- C. Monodentate
- D. Crab claws
- E. Metal
Explanation: Chelates are sometimes metaphorically referred to as "crab claws" because of how they "grasp" a metal ion with multiple coordination…
Correct answer: Crab claws- A. Br
- B. CN-
- C. C204-
- D. OH-
- E. CI
Explanation: Oxalate ion (C₂O₄²⁻): Bidentate ligand, anionic, coordinates through both oxygen atoms, forming chelate complexes with metal ions.
Correct answer: C204-- A. steel
- B. brass
- C. bronze
- D. graphite
Explanation: Graphite is not an alloy. It is pure carbon. It is an allotrope.
Correct answer: graphite- A. High melting points
- B. Good conductors of electricity
- C. Hard metals
- D. Ions and compounds are colorless
Explanation: Transition elements form colored complexes due to d-d transitions except Zn²⁺, Sc³⁺, and Cu⁺.
Correct answer: Ions and compounds are colorless- A. 20-30
- B. 21-30
- C. 22-30
- D. 24-30
Explanation: The atomic number range for the 3d series, which includes the transition metals in the 3d subshell, is from 21 to 30.
Correct answer: 21-30- A. Amphoteric
- B. Neutral
- C. Oxidizing agent
- D. Reducing agent
Explanation: Vanadium can act as a reducing agent in various chemical reactions. A reducing agent is a substance that donates electrons to another…
Correct answer: Reducing agent- A. Normal Salt
- B. Mixed Salt
- C. Double Salt
- D. Complex Salt
Explanation: Potassium ferrocyanide, with the chemical formula K4Fe(CN)6, is considered a double salt.
Correct answer: Complex Salt- A. d to d orbital
- B. p to d orbital
- C. p to p orbital
- D. s to p orbital
Explanation: Transition metals show colored complexes due to their d-d transitions.
Correct answer: d to d orbital- A. Tin
- B. Zinc
- C. Aluminum
- D. Copper
Explanation: Zinc is used to galvanize iron sheets because it provides cathodic protection.
Correct answer: Zinc- A. Always diamagnetic
- B. Attracted by the magnet
- C. Not attracted by the magnet
- D. Repelled by the magnet
Explanation: This is correct. Unpaired electrons give rise to paramagnetism, causing the substance to be attracted by a magnet.
Correct answer: Attracted by the magnet- A. Water
- B. Sodium chloride
- C. Potassium sulfate
- D. Potassium dichromate
Explanation: Correct. The equilibrium between chromate and dichromate ions is pH-dependent.
Correct answer: Potassium dichromate- A. Paramagnetic
- B. Diamagnetic
- C. Polymagnetic
- D. Ferrimagnetic
Explanation: Correct. Paramagnetic substances have unpaired electrons and are attracted to a magnetic field.
Correct answer: Paramagnetic- A. Sc
- B. Y
- C. La
- D. Ac
Explanation: Sc) - Correct: The first transition series begins with Scandium (Z = 21).
Correct answer: Sc- A. 10
- B. 14
- C. 40
- D. 58
Explanation: 40) - Correct: The total number of transition elements is 40 (10 in each of the 4 transition series)
Correct answer: 40- A. The trans form is achiral and optically inactive while the cis form is chiral and exists in two enantiomeric forms.
- B. Both the cis and trans forms are achiral and optically inactive.
- C. The trans form is chiral and exists in two enantiomeric forms while the cis form is achiral and optically inactive.
- D. Both the cis and trans forms are chiral, and each exists in two enantiomeric forms.
Explanation: Cis is optically active and trans is optically inactive. For this question, you have to understand the fact that in the trans condition…
Correct answer: The trans form is achiral and optically inactive while the cis form is chiral and exists in two enantiomeric forms.