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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Read the Transition Elements notesFree MDCAT chapter notes with key terms531 questions · page 22 of 27
- A. It decreases continuously
- B. First it decreases then increases rapidly
- C. First it decreases in the start, constant in the middle and then increases at the end of series
- D. It remains almost constant in the series
Explanation: The covalent radii of transition elements generally follow this trend. As you move from left to right across the 3D series of transition…
Correct answer: First it decreases in the start, constant in the middle and then increases at the end of series- A. IIB and IIIB
- B. IVB and VB
- C. VB and VIB
- D. VIB and VIIB
Explanation: In moving from left to right in any transition series, the number of unpaired electrons increases up to groups VB and VIB, after that…
Correct answer: VB and VIB- A. H
- B. B
- C. N
- D. Br
Explanation: While bromine can form compounds with various elements, it is not typically associated with entering interstices of transition metals to…
Correct answer: Br- A. Binding energy depends on unpaired electrons
- B. M.P and B.Ps show irregular trend in 3d-series
- C. Diamagnetic substances are weekly repelled by the strong magnetic field
- D. Changes in the ionic radii along the series are regular
Explanation: Changes in the ionic radii along the series are much less regular, so that periodic trends in the properties of these ions are difficult…
Correct answer: Changes in the ionic radii along the series are regular- A. Fe+3
- B. Cr+3
- C. Ti+3
- D. Cu+2
Explanation: The paramagnetic behaviour is the strongest for Fe3+ and Mn2+
Correct answer: Fe+3- A. Cr
- B. Ni
- C. Mn
- D. Ti
Explanation: The correct answer is Titanium (Ti). Titanium's atomic size and bonding characteristics make it less suitable for substitution in…
Correct answer: Ti- A. They have partially filled d orbitals
- B. They show variable oxidation states
- C. Both A and B
- D. They have strong bonding
Explanation: The correct answer is Both A and B. Transition elements form complexes due to their partially filled d orbitals, which can overlap with…
Correct answer: Both A and B- A. Diamagnetic
- B. Paramagnetic
- C. Good conductor
- D. Ferromagnetic
Explanation: Paramagnetic materials are those that are attracted to a magnetic field.
Correct answer: Paramagnetic- A. Fe2+
- B. Mn2+
- C. Cr3+
- D. Zn2+
Explanation: Manganese (II) ion has 5 unpaired electrons in its d-orbital configuration. Its electron configuration is [Ar]3d5.
Correct answer: Mn2+- A. Variable
- B. Constant
- C. Single
- D. infinite
Explanation: Because their valence electrons are in two separate sets of orbitals, (n-1)d and ns, these elements have varying oxidation states.
Correct answer: Variable431. Cu+2 salts are:
- A. Paramagnetic
- B. Diamagnetic
- C. Ferromagnetic
- D. None of these
Explanation: Cu+2 salts are paramagnetic. Paramagnetism is a property exhibited by certain substances that are attracted to an external magnetic field.
Correct answer: Paramagnetic- A. Paired electrons
- B. Unpaired electrons
- C. Protons
- D. Neutrons
Explanation: The paramagnetic behavior of an atom, ion, or molecule is due to the presence of unpaired electrons.
Correct answer: Unpaired electrons- A. Mn
- B. Sc
- C. V
- D. Zn
Explanation: Overall, the combination of strong metallic bonds, an extended network of atoms, and delocalized electrons contributes to vanadium's high…
Correct answer: V- A. Increase, decrease
- B. Decrease, increase
- C. Decrease, decrease
- D. Increase, increase
Explanation: Option A is correct as the trend of unpaired electrons in the transition elements increases until manganese (Mn) and then decreases until…
Correct answer: Increase, decrease- A. Os
- B. Mn
- C. Fe
- D. Po
Explanation: Osmium (Os) is a transition metal belonging to Group 8 (VIII B) of the periodic table and has an atomic number of 76.
Correct answer: Os- A. Metals have free electrons in the valence shell
- B. The electrical conductivity of metals increases with the increase in temperature
- C. Metalloids are poor conductors of electricity
- D. Non-metals have atomic conductance usually less than 10-10 ohm-1
Explanation: Statement B is incorrect because the electrical conductivity of metals decreases with an increase in temperature, not increases.
Correct answer: The electrical conductivity of metals increases with the increase in temperature- A. +2
- B. +1
- C. +3
- D. 0
Explanation: in general, the most common oxidation state of selenium is +2. This is because selenium has six valence electrons and can gain two…
Correct answer: +2- A. [Co(NH3)6]Cl3
- B. [Co(NH3)5Cl]Cl2
- C. [Co(NH3)4Cl2]Cl
- D. [Co(NH3)5.H2O]Cl3
Explanation: This compound has only one ionisable Cl- out of the given three.[Co(NH3)4Cl2]Cl <-> [Co(NH3)4Cl2]+ + Cl-It also exhibits cis-trans isotherm.
Correct answer: [Co(NH3)4Cl2]Cl- A. +7
- B. -7
- C. +6
- D. -6
Explanation: Let x be the oxidation number of Mn. Now, we can set up an equation based on the sum of oxidation numbers: x+(−8)=−2.
Correct answer: +6- A. Aqua
- B. Ammine
- C. Carbonyl
- D. Nitro
Explanation: Nitro (NO2− ) is not a neutral ligand; it is a polyatomic ion with a charge of -1.
Correct answer: Nitro