Free Transition Elements MCQs with Answers

• A. [Co(H₂O)]²⁺
• B. [Co(H₂O)₆]-
• C. [CO(H₂O)₆]
• D. [Co(H₂O)₆]²⁺

Explanation: From the written formula, (II) indicates the complex has a +2 charge. Hexa-aquacobalt means there are 6 water molecules attached to one…

• A. Increases
• B. Increases and then decreases
• C. Rapidly decreases and then becomes constant
• D. Decreases and then increases

Explanation: Over all trend can be explained based two factors that are working there, nuclear attractions and inter electronic repulsions, where one…

• A. Blue and red
• B. Green
• C. Yellow
• D. Violet

Explanation: In [Ti(H₂O)₆]³⁺, the Ti atom has one valence electron which is excited when it absorbs yellow light.

• A. Sc, Y, La
• B. Sc, Cu, Au
• C. Cu, Ag, Au
• D. Zn, Cd, Hg

Explanation: Group III B has the following elements: Scandium (Sc) Yttrium (Y) Lanthanum (La) Actinium (Ac) Zn, Cd, Hg are members of group II B while…

• A. Black
• B. Orange
• C. White
• D. Green

Explanation: Copper, a reddish-brown solid, when heated in air is oxidized to Copper (II) oxide or cupric oxide. It is a black solid.

• A. Cr, Ag, Al
• B. Ag, Mn, Ni
• C. Cr, Mn, Ni
• D. Cu, Au, Mn

Explanation: Alloy steel is made up of many elements such as iron, carbon, vanadium, silicon, nickel, manganese, copper and chromium.

• A. Hg
• B. Zn
• C. C
• D. Fe

Explanation: Iron (Fe) is the most stable element in the periodic table as its structure, particularly its nucleus, is the most stable out of all the…

• A. Due to both s and d orbitals
• B. Due to s orbitals
• C. Due to d orbitals
• D. Due to unpaired electrons

Explanation: Transition elements have incomplete d orbitals, which allow electrons in other orbitals like s orbitals to get excited and jump into these…

• A. Ionic
• B. Coordinate covalent
• C. None of these
• D. Covalent

Explanation: A coordinate covalent bond, also known as a dative bond, is a kind of two-center, two-electron covalent bond in which the two electrons…

• A. Quantum Leap
• B. Orbital delocalization
• C. d-d splitting
• D. d-d splitting and orbital delocalization

Explanation: When the ligands approach the central metal ion, d- or f-subshell degeneracy is broken due to the static electric field.

• A. All of these
• B. Nickel
• C. Cobalt
• D. Iron

Explanation: Iron, cobalt, and nickel are important transition elements that are used in industries and are part of various machinery and appliances as…

• A. Complex ion
• B. Ligand
• C. Coordination sphere
• D. Complex compound

Explanation: The correct option for the given question is C) Coordination sphere. The coordination sphere refers to the central transition metal ion…

• A. Increases
• B. Decreases
• C. Remain the same
• D. No regular trend

Explanation: The melting points and boiling points of the 3d transition metals increase up to the middle of the series and then decrease.This is…

• A. +7
• B. -7
• C. +6
• D. -6

Explanation: Oxidation no of Mn=?Oxidation no of O=-2Overall charge on coordination sphere=-2Mn+4(-2)=-2Mn-8=-2 Mn=8-2Mn=+6

• A. Zn
• B. Hg
• C. Cu
• D. Fe

Explanation: Zinc: Zinc is the main metal in brass, but it is not present in bronze.Mercury: Mercury is a liquid metal that is not used in the…

• A. Au
• B. Ag
• C. Cu
• D. AlI of these options are correct

Explanation: All these three Au(gold), Ag(silver) and Cu (copper) are coinage metals and are used in making of coins.

• A. Fe2+
• B. Mn2+
• C. Cr5+
• D. Zn2+

Explanation: Option A: In Fe[2],The electrons fill up 3d orbitals after 4s orbitals are filled.

• A. 3
• B. 4
• C. 6
• D. 1

Explanation: The coordination number of an atom in a given molecule or a crystal refers to the total number of atoms, ion, or molecules bonded to the…

• A. Tetrahedral
• B. Square planar
• C. Trigonal bipyramidal
• D. Octahedral

Explanation: The sp3d2 hybridization leads to a central metal that has an octahedral geometry.

• A. Complex formation
• B. Color
• C. Fixed valency
• D. D-orbital

Explanation: The transition metal ions have unpaired d electrons which jump from one orbital to another.