Chemical Bonding and Molecular Structure

The number of species from the following in which the central atom uses sp3 hybrid orbitals in its bonding is . NH3, SO2, SiO2, BeCl2, CO2, H2O, CH4, BF3

Which of the following is least ionic?

1. CoCl2
2. KCl
3. BaCl2
4. AgCl

A diatomic molecule has a dipole moment of 1.2 D. If the bond distance is 1 Å, then fractional charge on each atom is 10-1 esu. (Given 1 D = 10-18 esucm)

Match List I with List II. Choose the correct answer from the options given below :

1. A-I, B-II, C-IV, D-III
2. A-IV, B-III, C-I, D-II
3. A-III, B-IV, C-I, D-II
4. A-II, B-I, C-III, D-IV

The total number of molecular orbitals formed from 2s and 2p atomic orbitals of a diatomic molecule is .

Given below are two statements: In the light of the above statements, choose the most appropriate from the options given below:

1. Statement I is true but Statement II is false.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is false but Statement II is true.

The molecule / ion with square pyramidal shape is

1. PCl5
2. [Ni(CN)4]2-
3. PF5
4. BrF5

The number of species from the following which are paramagnetic and with bond order equal to one is . H2, He2+, O2+, N22-, O22-, F2, Ne2+, B2

Number of compounds with one lone pair of electrons on central atom amongst following is . O3, H2O, SF4, ClF3, NH3, BrF5, XeF4

The total number of molecules with zero dipole moment among CH4, BF3, H2O, HF, NH3, CO2 and SO2 is .