Inorganic Chemistry PYQ — Page 17

The electronegativity difference between $\mathrm{N}$ and $\mathrm{F}$ is greater that that between $\mathrm{N}$ and $\mathrm{H}$ yet the dipole moment of $\mathrm{NH}_3$ (1.5 D) is larger than that of $\mathrm{NF}_3(0.2 \mathrm{D})$. This is because:

Which of the following is not isostructural with $\mathrm{SiCl}_4$ ?

$\left.\left[\mathrm{CoNH}_3\right)_4\left(\mathrm{NO}_2\right)_2\right] \mathrm{Cl}$ exhibits

More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is:

The correct order regarding the electronegativity of hybrid orbitals of carbon is:

$\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3$ (at. no. or $\mathrm{Cr}=24$ ) has a magnetic moment of 3.83 B.M. The correct distribution of $3 d$ electrons in the Chromium of the complex is:

Which of the following would have a permanent dipole moment?

The correct order in which the $\mathrm{O}-\mathrm{O}$ bond length increases in the following is:

Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?

Which of the following molecules has trigonal planar geometry?

The aqueous solution containing which one of the following ions will be colourless? (Atomic number : $\mathrm{Sc}=21, \mathrm{Fe}=26, \mathrm{Ti}=$ $22, \mathrm{Mn}=25$)

Four successive members of the first two transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionisation enthalpy?

Which of the following is the electron deficient molecule?

What is the correct relationship between the $\mathrm{pHs}$ of isomolars solution of sodium oxide $\left(\mathrm{pH}_1\right)$, sodium sulphide $\left(\mathrm{pH}_2\right)$, sodium selenide $\left(\mathrm{pH}_3\right)$ and sodium telluruide $\left(\mathrm{pH}_4\right)$ ?

Which one of the following is expected to exhibit optical isomerism? $(\mathrm{en}=$ ethylenediamine)

The correct order of acid strength is:

Which of the following oxides is expected to exhibit paramagnetic behaviour?

The correct sequence of increasing covalent character is represented by:

Which one of the following is an inner orbital complex as well as diamagnetic in behaviour? (Atomic number : $\mathrm{Zn}=30, \mathrm{Cr}=24$, $\mathrm{Co}$ $=27, \mathrm{Ni}=28$ )

The main reason for larger number of oxidation states exhibited by the actinoids than the corresponding lanthanoids is:

In an octahedral structure, the pair of $d$ orbitals involved in $d^2 s p^2$ hybridisation is:

In $\mathrm{BrF}_3$ molecule, the lone pairs occupy equatorial positions to minimize:

Among the following the pair in which the two species are not isostructural is:

Chloropicrin is obtained by the reaction