Inorganic Chemistry PYQ — Page 13

The correct statements from the following are : (A) The decreasing order of atomic radii of group 13 elements is \(\mathrm{Tl}>\) In \(>\mathrm{Ga}>\mathrm{Al}>\mathrm{B}\). (B) Down the group 13 electronegativity decreases from top to bottom. (C) \(\mathrm{Al}\) dissolves in dil. \(\mathrm{HCl}\) and liberates \(\mathrm{H}_2\) but conc. \(\mathrm{HNO}_3\) renders \(\mathrm{Al}\) passive by forming a protective oxide layer on the surface. (D) All elements of group 13 exhibits highly stable +1 oxidation state. (E) Hybridisation of \(\mathrm{Al}\) in \(\left[\mathrm{Al}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}\) ion is \(\mathrm{sp}^3 \mathrm{~d}^2\). Choose the correct answer from the options given below :

Given below are two statements: Statement (I) : In the Lanthanoids, the formation of ${\mathrm{Ce}}^{+4}$ is favoured by its noble gas configuration. Statement (II) : ${\mathrm{Ce}}^{+4}$ is a strong oxidant reverting to the common $+3$ state. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: Statement I: Fluorine has most negative electron gain enthalpy in its group. Statement II: Oxygen has least negative electron gain enthalpy in its group. In the light of the above statements, choose the most appropriate from the options given below.

The correct sequence of ligands in the order of decreasing field strength is :

Which one of the following complexes will exhibit the least paramagnetic behaviour? [Atomic number, \(\mathrm{Cr}=24, \mathrm{Mn}=25, \mathrm{Fe}=26, \mathrm{Co}=27\) ]

Given below are two statements : Statement (I) : Dimethyl glyoxime forms a six membered covalent chelate when treated with ${\mathrm{NiCl}}_{2}$ solution in presence of ${\mathrm{NH}}_{4}\mathrm{OH}.$ Statement (II) : Prussian blue precipitate contains iron both in $(+2)$ and $(+3)$ oxidation states. In the light of the above statements, choose the most appropriate answer from the options given below:

Total number of unpaired electrons in the complex ions \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}\) and \(\left[\mathrm{NiCl}_4\right]^{2-}\) is \(\qquad\)

The difference in the 'spin-only' magnetic moment values of \(\mathrm{KMnO}_4\) and the manganese product formed during titration of \(\mathrm{KMnO}_4\) against oxalic acid in acidic medium is _______ BM. (nearest integer)

Given below are two statements : Statement (I) : Fusion of \(\mathrm{MnO}_2\) with \(\mathrm{KOH}\) and an oxidising agent gives dark green \(\mathrm{K}_2 \mathrm{MnO}_4\). Statement (II) : Manganate ion on electrolytic oxidation in alkaline medium gives permanganate ion. In the light of the above statements, choose the correct answer from the options given below :

Select the compound from the following that will show intramolecular hydrogen bonding.

The number of species from the following which are paramagnetic and with bond order equal to one is ${H}_{2},{\mathrm{He}}_{2}^{+},{O}_{2}^{+},{N}_{2}^{2-},{O}_{2}^{2-},{F}_{2},{\mathrm{Ne}}_{2}^{+},{B}_{2}$

The number of unpaired d-electrons in \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}\) is

When \(\psi_{\mathrm{A}}\) and \(\psi_{\mathrm{B}}\) are the wave functions of atomic orbitals, then \(\sigma^*\) is represented by :

Which of the following material is not a semiconductor.

Match List - I with List - II. \(\begin{array}{ll} \text{List - I} & \text{List - II} \\ \text{Reaction} & \text{Type of redox reaction} \\ \text{(A) } \mathrm{TiCl}_4 & \text{(I) } \mathrm{e}^2, \mathrm{t}_2^0 \\ \text{(B) } \left[\mathrm{FeO}_4\right]^{2-} & \text{(II) } e^4, t_2^3 \\ \text{(C) } \left[\mathrm{FeCl}_4\right]^{-} & \text{(III) } e^0, t_2^0 \\ \text{(D) } \left[\mathrm{CoCl}_4\right]^{2-} & \text{(IV) } \mathrm{e}^2, \mathrm{t}_2^3 \end{array}\) Choose the correct answer from the options given below :

Consider the following test for a group-IV cation. \(\begin{aligned} & \mathrm{M}^{2+}+\mathrm{H}_2 \mathrm{~S} \rightarrow \mathrm{A} \text { (Black precipitate) }+ \text { by product } \\ & \mathrm{A}+\text { aqua regia } \rightarrow \mathrm{B}+\mathrm{NOCl}+\mathrm{S}+\mathrm{H}_2 \mathrm{O} \\ & \mathrm{B}+\mathrm{KNO}_2+\mathrm{CH}_3 \mathrm{COOH} \rightarrow \mathrm{C}+\text { by product } \end{aligned}\) The spin-only magnetic moment value of the metal complex \(\mathrm{C}\) is ______ BM (Nearest integer)

The statement(s) that are correct about the species \(\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}\)and \(\mathrm{Mg}^{2+}\). (A) All are isoelectronic (B) All have the same nuclear charge (C) \(\mathrm{O}^{2-}\) has the largest ionic radii (D) \(\mathrm{Mg}^{2+}\) has the smallest ionic radii Choose the most appropriate answer from the options given below :

Given below are two statements : Statement (I) : A $\pi$ bonding $\mathrm{MO}$ has lower electron density above and below the inter-nuclear axis. Statement (II) : The ${\pi }^{*}$ antibonding $\mathrm{MO}$ has a node between the nuclei. In light of the above statements, choose the most appropriate answer from the options given below:

The correct increasing order for bond angles among \(\mathrm{BF}_3, \mathrm{PF}_3\) and \(\mathrm{ClF}_3\) is :

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R).$ Assertion $(A):$ ${\mathrm{PH}}_{3}$ has lower boiling point than ${\mathrm{NH}}_{3}.$ Reason $(R):$ In liquid state ${\mathrm{NH}}_{3}$ molecules are associated through Vander Waal's forces, but ${\mathrm{PH}}_{3}$ molecules are associated through hydrogen bonding. In the light of the above statements, choose the most appropriate answer from the options given below:

Match List I with List II \(\begin{array}{|l|l|c|l|} \hline & \text{List - I} & & \text{List - II} \\ \hline & \text{(Elements)} & & \text{(Properties in their respective groups)} \\ \hline \text { A. } & \mathrm{Cl}, \mathrm{S} & \text { I. } & \text { Elements with highest electronegativity } \\ \hline \text { B. } & \mathrm{Ge}, \mathrm{As} & \text { II. } & \text { Elements with largest atomic size } \\ \hline \text { C. } & \text { Fr, Ra } & \text { III. } & \begin{array}{l} \text { Elements which show properties of both } \\ \text { metals and non-metal } \end{array} \\ \hline \text { D. } & \text { F, O } & \text { IV. } & \begin{array}{l} \text { Elements with highest negative electron } \\ \text { gain enthalpy } \end{array} \\ \hline \end{array}\) Choose the correct answer from the options given below:

Match List I with List II \(\begin{array}{|l|l|l|l|} \hline & \text{List - I} & & \text{List - II} \\ & \text{(Hybridization)} & & \text{(Orientation in Space)} \\ \hline \text { A. } & \mathrm{sp}^3 & \text { I. } & \text { Trigonal bipyramidal } \\ \hline \text { B. } & \mathrm{dsp}^2 & \text { II. } & \text { Octahedral } \\ \hline \text { C. } & \mathrm{sp}^3 \mathrm{~d} & \text { III. } & \text { Tetrahedral } \\ \hline \text { D. } & \mathrm{sp}^3 \mathrm{~d}^2 & \text { IV. } & \text { Square planar } \\ \hline \end{array}\) Choose the correct answer from the options given below:

An octahedral complex with the formula \(\mathrm{CoCl}_3 \cdot \mathrm{nNH}_3\) upon reaction with excess of \(\mathrm{AgNO}_3\) solution gives 2 moles of \(\mathrm{AgCl}\). Consider the oxidation state of \(\mathrm{Co}\) in the complex is ' \(x\) '. The value of " \(x+n\) " is ______

Choose the correct statements about the hydrides of group $15$ elements. A. The stability of the hydrides decreases in the order ${\mathrm{NH}}_{3}>{\mathrm{PH}}_{3}>{\mathrm{AsH}}_{3}>{\mathrm{SbH}}_{3}>{\mathrm{BiH}}_{3}$ B. The reducing ability of the hydrides increases in the order ${\mathrm{NH}}_{3}<{\mathrm{PH}}_{3}<{\mathrm{AsH}}_{3}<{\mathrm{SbH}}_{3}<{\mathrm{BiH}}_{3}$ C. Among the hydrides, ${\mathrm{NH}}_{3}$ is strong reducing agent while ${\mathrm{BiH}}_{3}$ is mild reducing agent. D. The basicity of the hydrides increases in the order ${\mathrm{NH}}_{3}<{\mathrm{PH}}_{3}<{\mathrm{AsH}}_{3}<{\mathrm{SbH}}_{3}<{\mathrm{BiH}}_{3}$ Choose the most appropriate from the option given below: