Chemical Bonding and Molecular Structure

An element 'E' has the ionisation enthalpy value of 374 kJ mol-1. 'E' reacts with elements A, B, C and D with electron gain enthalpy values of −328, −349, −325 and −295 kJ mol-1, respectively. The correct order of the products EA, EB, EC and ED in terms of ionic character is :

1. EB > EA > EC > ED
2. EA > EB > EC > ED
3. ED > EC > EA > EB
4. ED > EC > EB > EA

The sum of sigma ( ) and pi ( ) bonds in Hex-1,3-dien-5-yne is .

Total number of non-bonded electrons present in NO2- ion based on Lewis theory is .

The molecules having square pyramidal geometry are

1. BrF5 & PCl5
2. SbF5 & PCl5
3. BrF5 & XeOF4
4. SbF5 & XeOF4

Total number of molecules/species from the following which will be paramagnetic is . O2, O2+, O2-, NO, NO2, CO, K2[NiCl4], [Co(NH3)6]Cl3, K2[Ni(CN)4]

Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in z-direction] ? Choose the correct answer from the options given below:

1. D Only
2. E Only
3. C and D Only
4. A and B Only

Which of the following statement is true with respect to H2O, NH3 and CH4 ? Choose the correct answer from the options given below:

1. A, D and E Only
2. C, D and E Only
3. A, B and C Only
4. A, B, C and E Only

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

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

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

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

The number of molecules/ions that show linear geometry among the following is . SO2, BeCl2, CO2, N3-, NO2, F2O, XeF2, NO2+, I3-, O3