d and f Block Elements

The pair of lanthanides in which both elements have high third - ionization energy is :

Given below are two statement: one is labelled as Assertion \(\mathbf{A}\) and the other is labelled as Reason \(\mathbf{R}\)
Assertion A: \(5 \mathrm{f}\) electrons can participate in bonding to a far greater extent than \(4 \mathrm{f}\) e...

Which of the following statements are correct?
(A) The M\(^{3+}\)/M\(^{2+}\) reduction potential for iron is greater than manganese.
(B) The higher oxidation states of first row d-block elements get stabilized by oxide ion.
(C) Aqueous solu...

Prolonged heating is avoided during the preparation of ferrous ammonium sulphate to :

An acidified manganate solution undergoes disproportionation reaction. The spin-only magnetic moment value of the product having manganese in higher oxidation state is _____________ B.M. (Nearest integer)

The number of terminal oxygen atoms present in the product B obtained from the following reaction is _____________.
FeCr2O4 + Na2CO3 + O2 \(\to\) A + Fe2O3 + CO2
A + H+ \(\to\) B + H2O + Na+

The electronic configuration of Pt (atomic number 78) is :

For the reaction given below :
CoCl3 . xNH3 + AgNO3 (aq) \(\to\)
If two equivalents of AgCl precipitate out, then the value of x will be _____________.

Spin only magnetic moment of [MnBr6]4\(-\) is _________ B.M. (round off to the closest integer)

In neutral or faintly alkaline medium, \(\mathrm{KMnO}_{4}\) being a powerful oxidant can oxidize, thiosulphate almost quantitatively, to sulphate. In this reaction overall change in oxidation state of manganese will be :

In following pairs, the one in which both transition metal ions are colourless is :

The reaction of zinc with excess of aqueous alkali, evolves hydrogen gas and gives :

Which of the following \(3\mathrm{d}\)-metal ion will give the lowest enthalpy of hydration \(\left(\Delta_{\text {hyd }} \mathrm{H}\right)\) when dissolved in water ?

Which one of the lanthanoids given below is the most stable in divalent form?

The disproportionation of \(\mathrm{MnO}_{4}^{2-}\) in acidic medium resulted in the formation of two manganese compounds \(\mathrm{A}\) and \(\mathrm{B}\). If the oxidation state of \(\mathrm{Mn}\) in \(\mathrm{B}\) is smaller than that of...

Which of the following has least tendency to liberate \(\mathrm{H}_{2}\) from mineral acids?

Match List - I with List - II, match the gas evolved during each reaction.

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Which of the following pair is not isoelectronic species?
(At. no. Sm, 62; Er, 68; Yb, 70; Lu, 71; Eu, 63; Tb, 65; Tm, 69)

The number of statements correct from the following for Copper (at. no. 29) is/are ____________.
(A) Cu(II) complexes are always paramagnetic.
(B) Cu(I) complexes are generally colourless
(C) Cu(I) is easily oxidized
(D) In Fehling solution...

The 'f' orbitals are half and completely filled, respectively in lanthanide ions :
[Given : Atomic no. Eu, 63; Sm, 62; Tm, 69; Tb, 65; Yb, 70; Dy, 66]

The total number of \(\mathrm{Mn}=\mathrm{O}\) bonds in \(\mathrm{Mn}_{2} \mathrm{O}_{7}\) is __________.

Given below are two statements.
Statement I : Iron (III) catalyst, acidified \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) and neutral \(\mathrm{KMnO}_{4}\) have the ability to oxidise \(\mathrm{I}^{-}\) to \(\mathrm{I}_{2}\) independen...

In neutral or alkaline solution, \(\mathrm{MnO}_{4}^{-}\) oxidises thiosulphate to :

The spin-only magnetic moment value of the most basic oxide of vanadium among V2O3, V2O4 and V2O5 is _____________ B.M. (Nearest integer)

The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3 oxidation state?

The dark purple colour of \(\mathrm{KMnO}_{4}\) disappears in the titration with oxalic acid in acidic medium. The overall change in the oxidation number of manganese in the reaction is :

The spin-only magnetic moment value of the compound with strongest oxidizing ability among \(\mathrm{MnF}_{4}, \mathrm{MnF}_{3}\) and \(\mathrm{MnF}_{2}\) is ____________ B.M. [nearest integer]

Among the following, which is the strongest oxidizing agent?

Cerium (IV) has a noble gas configuration. Which of the following is correct statement about it?

The metal ion (in gaseous state) with lowest spin-only magnetic moment value is :

Among Co3+, Ti2+, V2+ and Cr2+ ions, one if used as a reagent cannot liberate H2 from dilute mineral acid solution, its spin-only magnetic moment in gaseous state is ___________ B.M. (Nearest integer)

The difference in oxidation state of chromium in chromate and dichromate salts is ___________.

Manganese (VI) has ability to disproportionate in acidic solution. The difference in oxidation states of two ions it forms in acidic solution is ____________.

Metals generally melt at very high temperature. Amongst the following, the metal with the highest melting point will be :

Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature? (Given Z for Nd = 60, Yb = 70, La = 57, Ce = 58)

In the structure of the dichromate ion, there is a :

The value of magnetic quantum number of the outermost electron of Zn+ ion is ______________.

In which one of the following sets all species show disproportionation reaction?

The Eu2+ ion is a strong reducing agent in spite of its ground state electronic configuration (outermost) : [Atomic number of Eu = 63]

The number of f electrons in the ground state electronic configuration of Np (Z = 93) is ___________. (Nearest integer)

The nature of oxides V2O3 and CrO is indexed as 'X' and 'Y' type respectively. The correct set of X and Y is :

Potassium permanganate on heating at 513 K gives a product which is :

The addition of dilute NaOH to Cr3+ salt solution will give :

Which one of the following lanthanoids does not form MO2? [M is lanthanoid metal]

In mildly alkaline medium, thiosulphate ion is oxidized by \(MnO_4^ -\) to "A". The oxidation state of sulphur in "A" is __________.

The number of 4f electrons in the ground statement electronic configuration of Gd2+ is ___________. [Atomic number of Gd = 64]

Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere?

The correct order of following 3d metal oxides, according to their oxidation numbers is :(a) CrO3, (b) Fe2O3, (c) MnO2, (d) V2O5, (e) Cu2O

Number of electrons present in 4f orbital of Ho3+ ion is ____________. (Given Atomic No. of Ho = 67)

Which one of the following metals forms interstitial hydride easily?