Inorganic Chemistry PYQ — Page 60

Cerium $(Z=58)$ is an important member of the lanthanoids. Which of the following statements about cerium is incorrect?

The maximum number of $90^{\circ}$ angles between bond pair of electrons is observed in

One mole of magnesium nitride on the reaction with an excess of water gives

The states of hybridization of boron and oxygen atoms in boric acid $\left(\mathrm{H}_3 \mathrm{BO}_3\right)$ are respectively

Aluminium chloride exists as dimer, $\mathrm{Al}_2 \mathrm{Cl}_6$ in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives

Which one the following ions has the highest value of ionic radius?

Consider the following nuclear reactions $$ \begin{aligned} & { }_{92}^{238} \mathrm{M} \rightarrow{ }_{\mathrm{y}}^{\mathrm{x}} \mathrm{N}+{ }_2^4 \mathrm{He} \\ & { }_{\mathrm{y}}^{\mathrm{N}} \mathrm{N} \rightarrow{ }_{\mathrm{B}}^{\mathrm{A}} \mathrm{L}+2 \beta^{+} \end{aligned} $$ The number of neutrons in the element $L$ is

The bond order in $\mathrm{NO}$ is $2.5$ while that in $\mathrm{NO}^{+}$is 3 . Which of the following statements is true for these two species?

Which one the following statement regarding helium is incorrect?

Which one of the following has the regular tetrahedral structure?

Coordination compound have great importance in biological systems. In this context which of the following statements is incorrect?

Which one the following has largest number of isomers?

Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them?

Which one of the following aqueous solutions will exhibit highest boiling point?

The correct order of magnetic moments (spin only values in B.M.) among is

Which among the following factors is the most important in making fluorine the strongest oxidizing halogen?

The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to

The coordination number of central metal atom in a complex is determined by

Which one of the following complexes in an outer orbital complex?

The correct order of bond angles (smallest first) in $\mathrm{H}_2 \mathrm{~S}, \mathrm{NH}_3, \mathrm{BF}_3$ and $\mathrm{SiH}_4$ is

Which one the following does not have $\mathrm{sp}^2$ hybridized carbon?

Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that

Which one of the following substances has the highest proton affinity?

What may be expected to happen when phosphine gas is mixed with chlorine gas?