MCQs on Polarisation and Fajans Rule

MCQs on Polarisation and Fajans Rule

1. The molecule, which contains sp³d² and p orbitals overlapping in it is

1. PCl₅
2. BrF₅
3. ClF₃
4. IF₇

Answer: (b)

2. Homolytic fission of C-C bond of ethane (C₂H₆) which gives an intermediate in which carbon atom is

1. sp³ hybridised
2. sp² hybridised
3. sp hybridised
4. sp³d hybridised

Answer: (b)

3. Which of the following compounds has the electron pair geometry as trigonal bipyramidal with three equatorial positions occupied by lone pairs of electrons?

1. AlCl₃
2. XeF₂
3. Pt(NH₃)₂Cl
4. CH₃MgBr

Answer: (b)

4. Select correct statement

1. Cations with 18 electron shells have greater polarising power than the cations with 8-electron shells.
2. Inner shell electrons have a poor shielding effect on the nucleus and thus electronegativity of the 18 electron shell is increased.
3. CuCl is covalent and NaCl is ionic
4. All are correct statements

Answer: (d)

5. In BrF₃ molecule the lone pairs occupy an equatorial position to minimise

1. lone pair-bond pair repulsion only
2. bond pair-bond pair repulsion only
3. lone pair-lone pair repulsion and lone pair-bond pair repulsion
4. lone pair-lone pair repulsion only

Answer: (d)

6. The hybridisation of phosphorous in POCl₃ is the same as in

1. P in PCl₃
2. S in SF₄
3. Cl in ClF₃
4. B in BCl₃

Answer: (a)

7. If the bond length and dipole moment of diatomic molecules are 1.25A^o and 1.0D respectively, what is the percent ionic character of the bond?

1. 10.66
2. 12.35
3. 16.66
4. 19.33

Answer: (c)

8. The molecule ML_x is planar with six pairs of electrons around M in the valence shell. The value of x is

1. 6
2. 2
3. 4
4. 3

Answer: (c)

9. Total number of electron pairs in PCl₅, PCl₄⁺ and PCl₆^– are respectively

1. 20, 16, 24
2. 24, 16, 20
3. 16, 20, 24
4. 24, 20, 16

Answer: (a)

10. If the water molecule is linear

1. it would have a very high boiling point
2. it would be highly reactive
3. its dipole moment would be zero
4. it would be highly ionic

Answer: (c)