Chemical Bonding and Molecular Structure

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the correct answer from the options given below :

1. (A) is false but (R) is true
2. (A) is true but (R) is false
3. Both (A) and (R) are true but (R) is NOT the correct explanation of (A)
4. Both (A) and (R) are true and (R) is the correct explanation of (A)

Number of compounds from the following with zero dipole moment is . HF, H2, H2S, CO2, NH3, BF3, CH4, CHCl3, SiF4, H2O, BeF2

Number of molecules/ions from the following in which the central atom is involved in sp3 hybridization is . NO3-, BCl3, ClO2-, ClO3-

1. 2
2. 4
3. 1
4. 3

Which one of the following molecules has maximum dipole moment?

1. CH4
2. NF3
3. NH3
4. PF5

Number of molecules/species from the following having one unpaired electron is . O2, O2-1, NO, CN-1, O22-

The correct statement/s about Hydrogen bonding is/are Choose the correct answer from the options given below:

1. A, B, C only
2. A only
3. A, D, E only
4. A, B, D only

The number of species from the following that have pyramidal geometry around the central atom is S2O32-, SO42-, SO32-, S2O72-

1. 4
2. 3
3. 2
4. 1

Number of compounds / species from the following with non-zero dipole moment is . BeCl2, BCl3, NF3, XeF4, CCl4, H2O, H2S, HBr, CO2, H2, HCl

Arrange the bonds in order of increasing ionic character in the molecules. LiF, K2O, N2, SO2 and ClF3 :

1. N2 < SO2 < ClF3 < K2O < LiF
2. ClF3 < N2 < SO2 < K2O < LiF
3. LiF < K2O < ClF3 < SO2 < N2
4. N2 < ClF3 < SO2 < K2O < LiF

The number of molecules/ion/s having trigonal bipyramidal shape is . PF5, BrF5, PCl5, [PtCl4]2-, BF3, Fe(CO)5