Inorganic Chemistry PYQ — Page 17

Given below are two statements: Statement (I): A solution of ${[\mathrm{Ni}{({H}_{2}O)}_{6}]}^{2+}$ is green in colour. Statement (II): A solution of ${[\mathrm{Ni}(\mathrm{CN}{)}_{4}]}^{2-}$ is colourless. In the light of the above statements, choose the most appropriate answer from the options given below:

Alkaline oxidative fusion of ${\mathrm{MnO}}_{2}$ gives "$A$ " which on electrolytic oxidation in alkaline solution produces $B.A$and $B$ respectively are:

The correct order of first ionization enthalpy values of the following elements is : (A) \(\mathrm{O}\) (B) \(\mathrm{N}\) (C) \(\mathrm{Be}\) (D) \(\mathrm{F}\) (E) \(\mathrm{B}\) Choose the correct answer from the options given below :

What will be the decreasing order of basic strength of the following conjugate bases? \({ }^{-} \mathrm{OH}, \mathrm{R} \overline{\mathrm{O}}, \mathrm{CH}_3 \mathrm{CO} \overline{\mathrm{O}}, \mathrm{C} \overline{\mathrm{I}}\)

Identity the incorrect pair from the following:

Total number of species from the following with central atom utilising \(\mathrm{sp}^2\) hybrid orbitals for bonding is _____. \(\mathrm{NH}_3, \mathrm{SO}_2, \mathrm{SiO}_2, \mathrm{BeCl}_2, \mathrm{C}_2 \mathrm{H}_2, \mathrm{C}_2 \mathrm{H}_4, \mathrm{BCl}_3, \mathrm{HCHO}, \mathrm{C}_6 \mathrm{H}_6, \mathrm{BF}_3, \mathrm{C}_2 \mathrm{H}_4 \mathrm{Cl}_2\)

Identify the correct statements about p-block elements and their compounds. (A) Non metals have higher electronegativity than metals. (B) Non metals have lower ionisation enthalpy than metals. (C) Compounds formed between highly reactive nonmetals and highly reactive metals are generally ionic. (D) The non-metal oxides are generally basic in nature. (E) The metal oxides are generally acidic or neutral in nature. Choose the correct answer from the options given below :

Number of metal ions characterized by flame test among the following is _________. ${\mathrm{Sr}}^{2+},{\mathrm{Ba}}^{2+},{\mathrm{Ca}}^{2+},{\mathrm{Cu}}^{2+},{\mathrm{Zn}}^{2+},{\mathrm{Co}}^{2+},{\mathrm{Fe}}^{2+}$

The total number of 'Sigma' and $\mathrm{Pi}$ bonds in 2-formylhex-4-enoic acid is

The number of ions from the following that are expected to behave as oxidising agent is : \(\mathrm{Sn}^{4+}, \mathrm{Sn}^{2+}, \mathrm{Pb}^{2+}, \mathrm{Tl}^{3+}, \mathrm{Pb}^{4+}, \mathrm{Tl}^{+}\)

The strongest reducing agent amont the following is:

Which one of the following molecules has maximum dipole moment?

Identify from the following species in which ${d}^{2}{\mathrm{sp}}^{3}$ hybridization is shown by central atom:

The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals A. have the same energy B. have the minimum overlap C. have same symmetry about the molecular axis D. have different symmetry about the molecular axis Choose the most appropriate from the options given below:

The number of neutrons present in the more abundant isotope of boron is ' \(x\) '. Amorphous boron upon heating with air forms a product, in which the oxidation state of boron is ' \(y\) '. The value of \(x+y\) is _______

Sum of bond order of $\mathrm{CO}$ and ${\mathrm{NO}}^{+}$ is

On reaction of Lead Sulphide with dilute nitric acid which of the following is not formed?

The correct statement/s about Hydrogen bonding is/are A. Hydrogen bonding exists when \(\mathrm{H}\) is covalently bonded to the highly electro negative atom. B. Intermolecular \(\mathrm{H}\) bonding is present in o-nitro phenol C. Intramolecular \(\mathrm{H}\) bonding is present in HF. D. The magnitude of \(\mathrm{H}\) bonding depends on the physical state of the compound. E. H-bonding has powerful effect on the structure and properties of compounds Choose the correct answer from the options given below:

In case of isoelectronic species the size of ${F}^{–},\mathrm{Ne}$ and ${\mathrm{Na}}^{+}$ is affected by:

Number of molecules from the following which can exhibit hydrogen bonding is _______ (nearest integer) 

Which of the following is least ionic?

Number of molecules/ions from the following in which the central atom is involved in \(\mathrm{sp}^3\) hybridization is \(\qquad\) \(\mathrm{NO}_3^{-}, \mathrm{BCl}_3, \mathrm{ClO}_2^{-}, \mathrm{ClO}_3\)

$A$ and $B$ formed in the following reactions are: ${\mathrm{CrO}}_{2}{\mathrm{Cl}}_{2}+4\mathrm{NaOH}\rightarrow A+2\mathrm{NaCl}+2{H}_{2}O$ $A+2\mathrm{HCl}+2{H}_{2}{O}_{2}\rightarrow B+3{H}_{2}O$

The correct IUPAC name of \(\left[\mathrm{PtBr}_2\left(\mathrm{PMe}_3\right)_2\right]\) is :