List of top Chemistry Questions on d -and f -Block Elements

The 'Spin only' Magnetic moment for $[Ni(NH_3)_6]^{2+}$ is _____ × $10^{−1}$ BM. (given = Atomic number of Ni : 28)

In the reaction of potassium dichromate, potassium chloride and sulfuric acid (conc.), the oxidation state of the chromium in the product is (+)_______.

Choose the correct statements from the following:
A. $ Mn_2O_7 $ is an oil at room temperature
B. $ V_2O_4 $ reacts with acid to give $ VO_2^{2+} $
C. $ CrO $ is a basic oxide
D. $ V_2O_5 $ does not react with acid
Choose the correct answer from the options given below:

Number of metal ions characterized by flame test among the following is _______.
$\text{Sr}^{2+}, \text{Ba}^{2+}, \text{Ca}^{2+}, \text{Cu}^{2+}, \text{Zn}^{2+}, \text{Co}^{2+}, \text{Fe}^{2+}$

Match the following :

(a) $[Cr(H_2O)_6]^{+3}$	(i) $t^2_{2g}eg^0$
(b) $[Fe(H_2O)_6]^{+3}$	(ii) $t^3_{2g}eg^0$
$(c) [Ni(H_2O)_6]^{+2}$	(iii) $t^3_{2g}eg^2$
(d) $[V(H_2O)_6]^{+3}$	(iv) $t^6_{2g}eg^2$

The pair of lanthanides will exceptionally high 3^rd ionisation enthalpy than neighbouring elements:

The spin-only magnetic moment value of $M ^{3+}$ ion (in gaseous state) from the pairs $Cr ^{3+} / Cr ^{2+}, Mn ^{3+} / Mn ^2, \quad Fe ^{3+} / Fe ^{2+}$ and $Co ^{3+} / Co ^{2+}$ that has negative standard electrode potential, is BM [Nearest integer]

Consider the reaction $Cu^{2+} + X^- → Cu_2X_2 + X_2$.
X² will be predominantly?

For a metal ion, the calculated magnetic moment is 4.90 BM. This metal ion has ______ number of unpaired electrons.

Cobalt chloride when dissolved in water forms pink colored complex $X$ which has octahedral geometry. This solution on treating with cone $HCl$ forms deep blue complex, $\underline{Y}$ which has a $\underline{Z}$ geometry $X, Y$ and $Z$, respectively, are

$KMnO _4$ oxidises $I ^{-}$in acidic and neutral/faintly alkaline solution, respectively, to

Among the following the incorrect statement about transition metals is

The magnetic moment of a transition metal compound has been calculated to be 3.87 B.M. The metal ion is

The Sum of number of lone pairs in central atom in IF₅ and IF₇ is:

For which of the following aqueous ion, spin only magnetic moment is 3.87 BM?

Which of the following elements have half-filled f-orbitals in their ground state?
(Given : atomic number $Sm =62 ; Eu =63 ; Tb =65 ; Gd =64, Pm =61$ )
A. $Sm$
B. $Eu$
C. $Tb$
D. $Gd$
E. $Pm$
Choose the correct answer from the options given below :

During the qualitative analysis of $SO _3^2$ using dilute $H _2 SO _4, SO _2$ gas is evolved which turns $K _2 Cr _2 O _7$ solution (acidified with dilute $H _2 SO _4$ ) :

The spin only magnetic moment of $\left[ Mn \left( H _2 O \right)_6\right]^{2+}$ complexes is ____ BM (Nearest integer) (Given: Atomic no of $Mn$ is 25 )

Which is good oxidising agent?

$Sm^{+2}$
$Ce^{+2}$
$Ce^{+4}$
$Tb^{+4}$

The calculated spin-only magnetic moment values in BM for [FeCl₄]^- and [Fe(CN)₆]^3- are

Nessler’s reagent does not have?

When alkaline KMnO₄ is treated with KI, the Iodide ion is oxidized to________.

The most basic oxide among MnO, Mn₂O₃, MnO₂ and Mn₂O₇ is

Nickel combines with a uninegative monodentate ligand (X^-) to form a paramagnetic complex [NiX4]^2-.The hybridization involved and number of unpaired electrons present in the complex and respectively

(a) \([Cr(H_2O)_6]^{+3}\)	(i) \(t^2_{2g}eg^0\)
(b) \([Fe(H_2O)_6]^{+3}\)	(ii) \(t^3_{2g}eg^0\)
\((c) [Ni(H_2O)_6]^{+2}\)	(iii) \(t^3_{2g}eg^2\)
(d) \([V(H_2O)_6]^{+3}\)	(iv) \(t^6_{2g}eg^2\)

List of top Chemistry Questions on d -and f -Block Elements

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