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. 0.25 to 2.5%
- B. 0.12 to 0.20%
- C. 3.0 to 4.5%
- D. 2.0 to 4.5%
Explanation: This range represents the typical carbon content in carbon steel, which is the most common type of steel used in construction and…
Correct answer: 0.25 to 2.5%- A. O2
- B. O2+
- C. O2-
- D. O2-2
Explanation: O2 has two unpaired electrons. Each oxygen atom contributes one unpaired electron to form the O=O bond, resulting in two unpaired…
Correct answer: O2- A. Zero
- B. Two
- C. Four
- D. Six
Explanation: Each copper ion in [Cu(NH3)4]SO4 is coordinated to four ammonia (NH3) ligands.
Correct answer: Four- A. p to d orbitals
- B. d to d orbitals
- C. p to p orbitals
- D. d to p orbitals
Explanation: The color of transition metal complexes is due to the transition of electrons between different energy levels within the d orbitals of the…
Correct answer: d to d orbitals- A. Parke's process
- B. Solvay process
- C. Cyanide process
- D. Amalgamation process
Explanation: The Parke's process is a pyrometallurgical industrial process for removing silver from lead during the production of bullion.
Correct answer: Parke's process- A. Cu
- B. Cu+
- C. Cu-
- D. Cu2+
Explanation: Electronic configuration of the options are as follows:Option A, Cu: 1s2 2s2 2p6 3s2 3p6 3d10 4s1, so its d subshell is filledOption B…
Correct answer: Cu2+- A. Para magnetism
- B. Diamagnetism
- C. Ferromagnetism
- D. Both Ferromagnetism and Paramagnetism
Explanation: It is useful, at the beginning, to identify the physical and chemical properties of transition elements which differ from main group…
Correct answer: Para magnetism- A. Blue
- B. Yellow
- C. Brown
- D. Pink
Explanation: The valence shell electronic configuration of Cu+2 ions is 3d9 Hence, aqueous Cu+2 ions are blue in colour,It contains 1 unpaired…
Correct answer: Blue- A. Cr3+
- B. Ti3+
- C. V3+
- D. Zn2+
Explanation: Electronic configuration of chromium 3+ is [Ar] 3d3. Cr3+ has 3 unpaired electrons in its outer most shell and thus it's the element which…
Correct answer: Cr3+- A. [Ar] 3d4 4s2
- B. [Ar] 3d2 4s2
- C. [Ar] 3d5 4s1
- D. [Ar] 3d5 4s2
Explanation: Chromium(Cr) and Copper(Cu) are two special cases in which electron from 4s orbital jumps to 3d so 4s orbital has only a single electron…
Correct answer: [Ar] 3d5 4s1- A. Cu
- B. Sc
- C. Zn
- D. Cr
Explanation: The answer to the question should be option C because Zinc does not show the variable valency as elements of the d-block.
Correct answer: Zn- A. Normal elements
- B. Transition elements
- C. Metallic elements
- D. None of them
Explanation: Transition elements show variable oxidation states because: 1. The energy difference between 3d and 4s orbitals is very small. 2.
Correct answer: Transition elements- A. [Co(en)3](NO3)3
- B. [Co(NH3)3(NO2)3]
- C. K3[Co(NO2)6]
- D. [Pt(NH3)2Cl4]
Explanation: Only option that has complex ion attached to cation is K3[Co(NO2)6], giving a definite evidence of it being anion. Hence it is the answer.
Correct answer: K3[Co(NO2)6]- A. Cr
- B. Co
- C. Fe
- D. Sn
Explanation: Right from the start, you can guess that the unknown element must be a d-block element, or a transition metal.
Correct answer: Cr- A. Triammine chlorobromonitroplatinum (IV) Chlorate
- B. Triammine chlorobromonitroplatimate (IV) Chloride
- C. Triammine bromochloronitroplatinum (IV) Chloride
- D. Triammine nitrochlorobromoplatninum (III) Chloride
Explanation: We need to follow the alphabetical order while naming the compound. The oxidation number of metal is +4.
Correct answer: Triammine bromochloronitroplatinum (IV) Chloride- A. 5d6
- B. 3d9
- C. 3d8
- D. 3d7
Explanation: The valence electronic configuration of Cu+2 is derived from the neutral atom of copper (Cu), which has an atomic number of 29.
Correct answer: 3d9- A. 58
- B. 48
- C. 30
- D. 25
Explanation: This is a factual recall question. There are 58 transition metals in the periodic table of elements, of which 30 are outer transition…
Correct answer: 58- A. sp3d
- B. spd6
- C. sp3d2
- D. sp2d3
Explanation: The octahedral geometry of the complex [Co(NH3)6]2+ is associated with the hybridization of the central cobalt (Co) atom.
Correct answer: sp3d2- A. CH3NH2
- B. OH-
- C. Cl-
- D. NH4+
Explanation: Ligand is a species that donates a lone pair of electrons by forming a dative coordinate bond with a central metal atom/ion.
Correct answer: NH4+- A. Hg
- B. Pb
- C. Fe
- D. As
Explanation: Mostly, bullets are made of lead which is toxic. Lead bullet fragments left in contact with body fluids are capable of solubilizing lead.
Correct answer: Pb