d and f Block Elements · Chemistry · TS EAMCET
MCQ (Single Correct Answer)
The pair of ions with paramagnetic nature and same number of electrons is
In which of the following transition metal ion (aquated) is not correctly matched with its colour?
Consider the following pairs of elements and identify the pairs of elements which have nearly same atomic radius.
I. Y, La
II. Zr, Hf
III. Mo, W
IV. Cr, Mo
$E_{\mathrm{M}^{3}| \mathrm{M}^{2+}}^{\circ}($ in V$)$ is highest for
Identify the correct statements about lanthanoids
I. $\mathrm{Ce}^{4+}$ and $\mathrm{Tb}^{4+}$ act as oxidising agents.
II. $\mathrm{Eu}^{2+}$ and $\mathrm{Yb}^{2+}$ act as oxidising agents.
III. Misch metal is an alloy of $95 \%$ iron and $5 \%$ lanthanoid metal.
IV. $\mathrm{La}^{3+}$ and $\mathrm{Ce}^{4+}$ are diamagnetic in nature.
Match the following
| List I (Industrial process) | List II (Catalyst used) |
| A Ostwald's process | I $\mathrm{CuCl}_2$ |
| B Haber's process | II Zeolites |
| C Deacon's process | III Pt gauge |
| D Cracking of hydrocarbons | IV Fe |
The correct answer is
Observe the following $f$-block elements
$\mathrm{Eu}(Z=63) ; \mathrm{Pu}(Z=94) ; \mathrm{Cf}(Z=98)$;
$\operatorname{Sm}(Z=62) ; \mathrm{Gd}(Z=64) ; \mathrm{Cm}(Z=96)$
How many of the above have half-filled $f$-orbitals in their ground state?
$Y$ in the given sequence of reactions is
$$ \begin{gathered} \mathrm{P}_4+x \mathrm{NaOH}+y \mathrm{H}_2 \mathrm{O} \xrightarrow{\mathrm{CO}_2} X+z \mathrm{NaH}_2 \mathrm{PO}_2 \\ X+\mathrm{CuSO}_4 \longrightarrow Y+\mathrm{H}_2 \mathrm{SO}_4 \end{gathered} $$
Identify the correct statements from the following.
(i) Ti (IV) is more stable than Ti (III) and Ti (II).
(ii) Among $3 d$-series elements (From $Z=22$ to 29). Only copper has positive reduction potential $\left(M^{2+} / M\right)$.
(iii) Both Sc and Zn exhibit +1 oxidation state.
The product formed during thermal decomposition of ammonium dichromate are
In +2 oxidation state, which of the following lanthanoids act as reducing agents?
Among the following the incorrect statement about transition metals is
Observe the following ions
$$ \mathrm{V}^{2+}, \mathrm{Zn}^{2+}, \mathrm{Cu}^{2+}, \mathrm{Fe}^{2+}, \mathrm{Fe}^{3+}, \mathrm{Ti}^{3+}, \mathrm{Sc}^{3+}, \mathrm{Ti}^{4+}, \mathrm{Ni}^{3+}, \mathrm{Co}^{3+}, \mathrm{Cu}^{+} $$
How many ions in the above list have zero magnetic moment?
The order of melting points of $\mathrm{Cr}, \mathrm{Mo}$ and W is
Assertion (A) Mo has the ground state electronic configuration $4 d^5 5 s^1$.
Reason (R) Mo has the highest exchange energy among the second row transition elements.
The correct option among the following is
Choose the correct statement.
$\mathrm{Fe}^{3+}$ ion is more stable than $\mathrm{Fe}^{2+}$ ion because
The elements with full $d^{10}$ electronic configuration in their " +2 " oxidation state are
The increase in the atomic radii of the third (5d) series of transition elements is very small, which may be accounted for the filling of ' $X$ ' orbitals before ${ }^{\prime} Y^{\prime}$ orbitals $X$ and $Y$ are
The valency shell electronic configuration of Cr and Cu atoms, respectively, are
Identify all the correct statements for lanthanoide contraction.
(A) The covalent properties of the lanthanoide metal hydroxides increases from La to Lu.
(B) The chemical reactivity decreases from La to Lu.
(C) $\mathrm{La}(\mathrm{OH})_3$ is more basic than $\mathrm{Lu}(\mathrm{OH})_3$.
(D) Zr and Hf have about the same radius.
(E) Separation of lanthanoides from one another is easy.
On treating $\mathrm{SO}_2$ with aqueous solution of $\mathrm{KMnO}_4$, the manganese ion reduces to
The correct order of ionic radii of trivalent ions $\mathrm{Y}^{3+}, \mathrm{La}^{3+}, \mathrm{Eu}^{3+}$ and $\mathrm{Lu}^{3+}$ is $(\mathrm{Y}=39, \mathrm{La}=57, \mathrm{Eu}=63, \mathrm{Lu}=71)$
When permanganate ion is heated at 513 K , led to the formation of two manganese based products. The physical properties of the product in which manganese with the higher oxidation state than the other are
Assertion (A) In general, transition metals have high melting points.
Reason (R) More number of electrons from ' $(n-1) d^{\prime}$ and ' $n s$ ' are involved in interatomic metallic bonding.
The correct option among the following is
Trans uranium elements are
Which of the following is a diamagnetic ion?
Which of the following ions will exhibit colour in aqueous solution?
What is the oxidation state of Cr , when the pH of the aqueous solution of potassium dichromate changes from acidic to basic?
The highest oxidation state observed in first row transition metals is
Among the following series of transition metal ions, the one in which all the metal ions have $3 d^2, 3 p^6$ electronic configuration is
(Atomic number, $\mathrm{Ti}=22, \mathrm{~V}=23, \mathrm{Cr}=24$, $\mathrm{Mn}=25$ )
Which of the following statement is not true about interstitial complexes?