Inorganic Chemistry PYQ — Page 55

Bond distance in $\mathrm{HF}$ is $9.17 \times 10^{-11} \mathrm{~m}$. Dipole moment of $\mathrm{HF}$ is $6.104 \times 10^{-30} \mathrm{Cm}$. The percentage ionic character in $\mathrm{HF}$ will be : (electron charge $=1.60 \times 10^{-19} \mathrm{C}$ )

Type of isomerism which exists between $\left[\mathrm{Pd}\left(\mathrm{C}_6 \mathrm{H}_5\right)_2(\mathrm{SCN})_2\right]$ and $\left[\mathrm{Pd}\left(\mathrm{C}_6 \mathrm{H}_5\right)_2(\mathrm{NCS})_2\right]$ is :

Which of the following is wrong statement?

The internuclear distances in $\mathrm{O}-\mathrm{O}$ bonds for $\mathrm{O}_2^{+}, \mathrm{O}_2, \mathrm{O}_2^{-}$and $\mathrm{O}_2^{2-}$ respectively are :

Potassium dichromate when heated with concentrated sulphuric acid and a soluble chloride, gives brown-red vapours of :

Stability of the species ${\text{Li}}_{2} \text{,} {\text{Li}}_{2}^{-} \text{and} {\text{Li}}_{2}^{+}$ increases in the order of

The magnetic moment of the complex anion $\left[\mathrm{Cr}(\mathrm{NO})\left(\mathrm{NH}_3\right)(\mathrm{CN})_4\right]^{2-}$ is :

Identify incorrect statement :

Which of the following is diamagnetic ?

Identify the incorrect statement:

Bond order normally gives idea of stability of a molecular species. All the molecules viz. $\mathrm{H}_2, \mathrm{Li}_2$ and $\mathrm{B}_2$ have the same bond order yet they are not equally stable. Their stability order is :

In which of the following ionization processes the bond energy has increased and also the magnetic behaviour has changed from paramagnetic to diamagnetic ?

Which of the following statements is incorrect?

In which of the following pairs of molecules/ions, both the species are not likely to exist?

The catenation tendency of $\mathrm{C}, \mathrm{Si}$ and $\mathrm{Ge}$ is in the order $\mathrm{Ge} < \mathrm{Si} < \mathrm{C}$. The bond energies (in $\mathrm{kJ} \mathrm{~mol}^{-1}$ ) of $\mathrm{C}-\mathrm{C}, \mathrm{Si}-\mathrm{Si}$ and $\mathrm{Ge}-\mathrm{Ge}$ bonds are respectively ;

The $d$-electron configurations of $\mathrm{Cr}^{2+}, \mathrm{Mn}^{2+}, \mathrm{Fe}^{2+}$ and $\mathrm{Co}^{2+}$ are $d^4, d^5, d^6$ and $d^7$ respectively. Which one of the following will exhibit the lowest paramagnetic behaviour? (Atomic no. $\mathrm{Cr}=24, \mathrm{Mn}=25, \mathrm{Fe}=26, \mathrm{Co}=27$ ).

The number of $\mathrm{S}-\mathrm{S}$ bonds in $\mathrm{SO}_3, \mathrm{~S}_2 \mathrm{O}_3^{2-}$ $\mathrm{S}_2 \mathrm{O}_6^{2-}$ and $\mathrm{S}_2 \mathrm{O}_8^{2-}$ respectively are

How many cyclic structures are possible for $\mathrm{C}_4 \mathrm{H}_6$ ?

The number of unpaired electrons in Gadolinium $[\mathrm{Z}=64]$ is

Which is not the correct Statement? (At. nos. $\mathrm{Ce}=58, \mathrm{Lu}=71, \mathrm{La}=57, \mathrm{Yb}=70$ )

Which pair of elements with the given atomic numbers is expected to have similar properties?

In which of the following pairs the two species are not isostructural?

Magnetic moment of $\mathrm{Gd}^{3+}$ ion $(\mathrm{Z}=64)$ is

Which one of the following will react most vigorously with water?