Shape and Geometry Using VSEPR

Q. Which of the following statements is/are not correct?

1. The bond angle Si-O-Si in $(Si{H}_3{)}_{2}O$ is larger than that of C–O–C in $(C{H}_3{)}_{2}O$
2. $B{F}_3$ has more Lewis acidic nature than $B{I}_3$
3. $p\pi -d\pi$ bond electrons get delocalized between B and N atoms in $B_3{N}_3{H}_6$
4. $C{H}_{3}NCS$ is linear, while $Si{H}_{3}NCS$ is bent structure

Q. Explain the sommerfield model in details

Q.

Starting from Lewis structure, determine the hybridization types of the central atom of ${\mathrm{TeCl}}_4$ and ${{\mathrm{ICl}}_4}^{-}$.

Q. In the structure of $Cl{F}_3$, the number of lone pair of electrons on the central atom $Cl$ is:

1. Four
2. Two
3. One
4. Three

Q. explain sommerfeld extension on bohr theory

Q.

According to the VSEPR theory, the geometry and shape of the molecule depends upon:

1. Bond pair of electrons present on the central atom

2. Hybridization of the molecule

3. Both bond pair as well as lone pair of electrons in the valence shell of the central atom

4. Lone pair of electrons present on the central atom

Q. For, $H_{2}O$ the bond angle is ${104.5}^{\circ }$ and for $H_{2}S$ the bond angle is ${92.1}^{\circ }$ .
Difference in bond angle is due to :

1. The larger size of $S$ atom as compared to $O$ atom which decreases the orbital overlap and hence the hybridization tends to be purely p orbitals.
2. Liquid state of $H_{2}O$ as compared to gaseous state of $H_{2}S$
3. Both of the above
4. None of the above

Q. 61. If an ionic solid XY (X&Y are monovalent ions) doped with 10to the power -2 mole% of another ionic solid AY3 then the concentration of the cation vacancies created is

Q. M2SO4 (M+ is a monovalent metal ion ) has Ksp of 1.2 ×10^-5 at 298 K . The maximum conc. Of M+ ion that could be attained in a saturated solution of this solid at 298K is

Q. The shapes of $PC{l}_4^{+},PC{l}_4^{-}$ and $AsC{l}_5$ are respectively:

1. square planar, tetrahedral and see-saw
2. tetrahedral, see-saw and trigonal bipyramidal
3. tetrahedral, square planar and pentagonal bipyramidal
4. trigonal bipyramidal, tetrahedral and square pyramidal

Q.

Total number of angular node in 3d orbital is

1. 0

2. 1

3. 2

4. 3

Q. Which of the following statements is/are wrong?

1. $O_3$ molecule has linear structure
2. Ozone is violet-black in solid state
3. Ozone is a paramagnetic gas
4. (a) and (c) above.

Q. 40 Which of the d orbital has its 4 lobes along the axis - dxy dyz dzx dx2-dy2

Q. How to guess which is the central atom of SCN- so that to calculate hybridisation.

Q. For 2s orbital the nodal surface is at a distance of?

Q.

The bond order of Li₂ molecule is:

1. 3

2. 2

3. 1

4. 0

Q. 4. q-hybridisation of Al in AlCl3 (monomeric form above 800C) and Al2Cl6(dimeric form below 400C) respectively are?

Q. Two of the following species have the same shape-
$N{I}_3$ , $I_3^{-}$, $S{O}_3^{-2}$, $N{O}_3^{-}$. These species are-

1. $N{I}_3$ , $I_3^{-}$
2. $N{I}_3$ , $S{O}_3^{-2}$
3. $S{O}_3^{-2}$, $N{O}_3^{-}$
4. $I_3^{-}$ , $N{O}_3^{-}$

Q. Which compound has a planar structure?

1. $Xe{F}_4$
2. $Xe{O}_3$
3. $Xe{O}_2{F}_2$
4. $Xe{O}_4$

Q. Why does hydrogen occur in a diatomic form rather than in a monoatomic form under normal conditions?

Q.

What happens when two atoms form a chemical bond ?

Q. give the differences between orbit, orbital, shell, subshell

Q. Which of the following statements is not true about VSEPR theory?

1. Lone pair - lone pair repulsion is maximum
2. The lone pair and double bonds occupy equatorial positions in the trigonal bipyramidal structure
3. More electronegative atoms occupy axial positions in the trigonal bipyramidal structure
4. Bigger atoms occupy the axial position in the trigonal bipyramidal structure

Q. Which of the following molecule is polar as well as planar?

1. 
2. 
3. 
4. None of these

Q. 51. Hybrid Orbitals always forms sigma bond", except Benzyne". Why Benzyne is an exception?

Q. Which of the following orbitals is cylindrically symmetrical about x-axis ? (A) Pz-orbital (B) Px-orbital (C) Py-orbital (D) d orbital.

Q.

Which of the following represent p-orbital?

1. 

2. 

3. 

4. None of these

Q. How to find that SnCl_2 has a vacant d orbital

Q. Hybridization of central atoms in the moleculesN(CH3)3 and N(SIH3) respectively are(1) sp2 and sp2(2) sp3 and sp3(3) sp2 and sp34) sp3 and sp2

Q. among NaOH and NaCH3 which one is the strong bronstead bas