Transition and Inner Transition Elements One Mark Online Test

Transition and Inner Transition Elements One Mark Online Test (12th Standard Chemistry)

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Sc( Z=21) is a transition element but Zinc (z=30) is not because

A.both \(Sc^{3+}\) and \(Zn^{2+}\) ions are colourless and form white compounds. B.in case of Sc, 3d orbitals are partially filled but in Zn these are completely filled C.last electron as assumed to be added to 4s level in case of zinc D.both Sc and Zn do not exhibit variable oxidation states

Which of the following d block element has half filled penultimate d sub shell as well as half filled valence sub shell?

A.Cr B.Pd C.Pt D.none of these

Among the transition metals of 3d series, the one that has highest negative \(M/M^{2+}\) standard electrode potential is

A.Ti B.Cu C.Mn D.Zn

Which one of the following ions has the same number of unpaired electrons as present in \(V^{3+}\)?

A.\(Ti^{3+}\) B.\(Fe^{3+}\) C.\(Ni^{2+}\) D.\(Cr^{3+}\)

The magnetic moment of \(Mn^{2+}\) ion is

A.5.92BM B.2.80BM C.8.95BM D.3.90BM

The catalytic behaviour of transition metals and their compounds is ascribed mainly due to

A.their magnetic behaviour B.their unfilled d orbitals C.their ability to adopt variable oxidation states D.their chemical reactivity

Electrochemical process is used to extract

A.Iron B.Lead C.Sodium D.silver

How many moles of \(I_2\) are liberated when 1 mole of potassium dichromate react with potassium iodide?

A.1 B.2 C.3 D.4

The number of moles of acidified \(KMnO_4\) required to oxidize 1 mole of ferrous oxalate (\(FeC_2O_4\)) is

A.5 B.3 C.0.6 D.1.5

Q10

Which one of the following statements related to lanthanons is incorrect?

A.Europium shows +2 oxidation state. B.The basicity decreases as the ionic radius decreases from Pr to Lu. C.All the lanthanons are much more reactive than aluminium. D.Ce4+ solutions are widely used as oxidising agents in volumetric analysis.

Q11

Which of the following lanthanoid ion is diamagnetic?

A.\(Eu^{2+}\) B.\(Yb^{2+}\) C.\(Ce^{2+}\) D.\(Sm^{2+}\)

Q12

Which of the following oxidation state is most common among the lanthanoids?

A.+4 B.+2 C.+5 D.+3

Q13

Assertion: \(Ce^{4+}\) is used as an oxidizing agent in volumetric analysis. Reason: \(Ce^{4+}\) has the tendency of attaining +3 oxidation state.

A.Both assertion and reason are true and reason is the correct explanation of assertion. B.Both assertion and reason are true but reason is not the correct explanation of assertion. C.Assertion is true but reason is false. D.Both assertion and reason are false.

Q14

The most common oxidation state of actinoids is

A.+2 B.+3 C.+4 D.+6

Q15

The actinoid elements which show the highest oxidation state of +7 are

A.Np, Pu, Am B.U, Fm, Th C.U, Th, Md D.Es, No, Lr

Q16

Which one of the following is not correct?

A.\(La(OH)_3\) is less basic than \(Lu(OH)_3\) B.In lanthanoid series ionic radius of \(Ln^{3+}\) ions decreases C.La is actually an element of transition metal series rather than lanthanoid series D.Atomic radii of Zr and Hf are same because of lanthanoid contraction

Q17

According to the periodic classification, which groups in the modern periodic table are occupied by transition metals?

A.Groups 1 to 2 B.Groups 3 to 12 C.Groups 13 to 18 D.Groups 1 to 18

Q18

What is the general outer electronic configuration of d-block elements, where 'n' represents the principal quantum number of the outermost shell?

A.\((n-1)d^{1-10} ns^{1-2}\) B.\((n-1)d^5 ns^1\) C.\((n-1)d^{10} ns^2\) D.\(nf^{1-14} (n-1)d^{1-10} ns^2\)

Q19

Which transition metal is recognized as having the highest electrical conductivity of all known elements at room temperature?

A.Copper B.Gold C.Silver D.Aluminum

Q20

In the 3d transition series, why does the atomic radius remain nearly constant from chromium to copper?

A.Increased shielding by 4s electrons B.Decrease in nuclear charge C.Balancing of increased nuclear charge by 3d-4s electron repulsion D.Absence of d-electrons

Q21

Which element in the 3d series exhibits the highest number of different oxidation states?

A.Scandium B.Chromium C.Manganese D.Iron

Q22

Why are the standard reduction potential (\(E^0\)) values for Manganese (\(Mn^{2+}/Mn\)) and Zinc (\(Zn^{2+}/Zn\)) more negative than expected from the general trend?

A.High ionization enthalpy B.Stability of half-filled (\(d^5\)) and completely filled (\(d^{10}\)) configurations C.Low metallic bonding D.Small atomic size

Q23

Using the spin-only formula, what is the calculated magnetic moment for a transition metal ion containing three unpaired electrons?

A.1.73 BM B.2.83 BM C.3.87 BM D.4.90 BM

Q24

Which type of catalyst is specifically used in the industrial process to convert acetaldehyde into acetic acid?

A.Iron B.Vanadium pentoxide C.Rhodium or Iridium complex D.Ziegler-Natta catalyst

Q25

According to the Hume-Rothery rules for forming a substitute alloy, the difference between the atomic radii of the solvent and solute must be less than what percentage?

A.5% B.10% C.15% D.25%

Q26

Which of the following properties is characteristic of interstitial compounds formed by transition metals?

A.They are always stoichiometric B.They have lower melting points than pure metals C.They are chemically very reactive D.They are hard and show high electrical conductivity

Q27

What is the oxidation state of manganese in the higher oxide \(Mn_2O_7\), which is known to be covalent and acidic?

A.+2 B.+4 C.+6 D.+7

Q28

What is the general electronic configuration for the lanthanoid series of inner transition elements?

A.\([Xe] 4f^{1-14} 5d^{0-1} 6s^2\) B.\([Rn] 5f^{1-14} 6d^{0-2} 7s^2\) C.\([Xe] 4f^1 5d^1 6s^2\) D.\([Xe] 5d^{1-10} 6s^2\)

Q29

What is the primary cause of the gradual decrease in atomic and ionic radii observed across the lanthanoid series?

A.Increase in number of shells B.Effective shielding of 4f electrons C.Poor shielding effect of 4f electrons D.Decrease in nuclear charge

Q30

Which of the following actinoid elements are capable of exhibiting the highest oxidation state of +7?

A.Thorium and Uranium B.Neptunium and Plutonium C.Americium and Curium D.Californium and Einsteinium

Q31

Compared to lanthanoids, why do actinoids show a greater tendency to form coordination complexes?

A.Larger ionic size B.Higher binding energy of 5f orbitals C.Lower binding energy of 5f orbitals and higher ionic charge D.Lack of unpaired electrons

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This free online practice test covers Transition and Inner Transition Elements from the 12th Standard Chemistry (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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