Shape and Geometry Using VSEPR

Q. $PC{l}_5$ has a shape of trigonal bipyramidal whereas $I{F}_5$ has a shape of square pyramidal, it is due to-

1. Presence of unshared electron pairs on $I$ which is oriented so as to minimise repulsion while in $PC{l}_5$ has no non-bonding pair.
2. Octet of $P$ is complete whereas that of $I$ is incomplete.
3. $P$ and $I$ belong to different group and period.
4. Extent of different repulsion in $F$ and $I$

Q. Consider the molecules $C{H}_4$, $N{H}_3$ and $H_{2}O$. Which of the given statements is false?

1. The H-O-H bond angle in $H_{2}O$ is smaller than the H-N-H bond angle in $N{H}_3$
2. The H-C-H bond angle in $C{H}_4$ is larger than the H-N-H bond angle in $N{H}_3$
3. The H-C-H bond angle in $C{H}_4$, the H-N-H bond angle in $N{H}_3$ and the H-O-H bond angle in $H_{2}O$ are all greater than 90⁰
4. The H-O-H bond angle in $H_{2}O$ is larger than the H-C-H bond angle in $C{H}_4$

Q. $B-H-B$ bridge in $B_2{H}_6$ is formed by the involvement of:

1. 2 electrons
2. 1 electrons
3. 3 electorns
4. 4 electrons

Q. What is the shape of $Cl{F}_2^{-}$ ion?

1. Bent
2. Linear
3. Pyramidal
4. None of these

Q.

Among the following species, identify the iso-structural pairs.

$N{F}_3,N{O}_3^{-},B{F}_3,H_3{O}^{+},N_{3}H$

1. [$N{F}_3,N{O}_3^{-}$] and [$B{F}_3,H_3{O}^{+}$]

2. [$N{F}_3,B{F}_3$] and [$N{O}_3^{-},H_3{O}^{+}$]

3. [$N{F}_3,H_3{O}^{+}$] and [$N{O}_3^{-},B{F}_3$]

4. [$N{F}_3,N{O}_3^{-}$] and [$B{F}_3,H_3{O}^{+}$]

Q.

An element L consists of molecules.

1. What type of bonding is present in the particles that make up L?
2. When L is heated with iron metal, it forms a compound FeL. What chemical term would you use to describe the change undergone by L?

Q. In which of the following pairs, both the species are not isostructural?

1. $N{H}_3,P{H}_3$
2. $Xe{F}_4,Xe{O}_4$
3. $SiC{l}_4,PC{l}_4^{+}$
4. Diamond, silicon crabide

Q. The structure of $IC{l}_2^{+}$ would be:

1. 
2. 
3. 
4. None of these

Q. Which one of the following species is planar and non-polar with two lone pairs of electrons on the central atom?

1. $CI{F}_3$
2. $Xe{F}_5^{-}$
3. $PC{l}_5$
4. $Br{F}_5$

Q. In the structure of $H_{2}CS{F}_4,$ to decide the plane in which $C=S$ is present the following bond angle values are given
Axial $\angle FSF$ (idealized = ${180}^{\circ }$) $\Rightarrow {170}^{\circ }$
Equatorial $\angle FSF$ (idealized = ${120}^{\circ }$) $\Rightarrow {97}^{\circ }$
After deciding the plane of double bond which of the following statement is correct?

1. Two $C-H$ bonds are in the same plane of equatorial $S-F$ bonds
2. Total six atoms are in the same plane
3. Axial $S-F$ bonds are perpendicular to plane of $=$ bond
4. Both a and b

Q. Some of properties of two species $N{O}_3^{-}$ and $H_3{O}^{+}$ are described below. Which one of the following statement is correct?

1. Dissimilar in hybridization for the central atom with different structures
2. Isostructural with same hybridization for the central atom
3. Isostructural with different hybridization for the central atom
4. Similar in hybridization for the central atom with different structures

Q. How many lone pair(s) are present in $N_2{H}_4$?

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

Q. Which of the following molecules have the same hybridisation?
$\left(i\right)PC{l}_3\left(ii\right)H_{2}O\left(iii\right)C{O}_2\left(iv\right)N{H}_3\left(v\right)S{O}_4^{2-}\left(vi\right)N{O}_3^{-}$

1. $\left(i\right)$ and $\left(ii\right)$
2. $\left(i\right),\left(ii\right),\left(iii\right),\left(iv\right)$ and $\left(v\right)$
3. $\left(i\right),\left(iii\right),\left(v\right)$ and $\left(vi\right)$
4. $\left(i\right),\left(ii\right),\left(iv\right)$ and $\left(v\right)$

Q. Which of the following is the shape of $X{e}_2{F}_2$ ?

1. Linear.
2. Trigonal Bipyramidal
3. See-Saw.
4. T-Shaped.

Q. Molecular shape of $C{F}_4$, $S{F}_4$ and $Xe{F}_4$ are-

1. the same, with 2, 0 and 1 lone pair of electrons respectively.
2. the same, with 1, 1 and 1 lone pair of electrons respectively.
3. different, with 0, 1 and 2 lone pair of electrons respectively.
4. different, with 1, 0 and 2 lone pair of electrons respectively.

Q. Among the following, the molecule that is bent/V-shape is/are:

1. $C{O}_2$
2. $N{O}_2$
3. $Cl{O}_2$
4. (b) and (c) above

Q. Which of the following molecules are planar in shape?

1. $N(Si{H}_3{)}_3$
2. $N(C{H}_3{)}_3$
3. $P(Si{H}_3{)}_3$
4. Both (a) and (c)

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. Number of bonding pairs and lone pairs around the central atom in the $I_3^{-}$ ion are:

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

Q. Which is not true about VSEPR theory?

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

Q. $PC{l}_5$ has a shape of trigonal bipyramidal whereas $I{F}_5$ has a shape of square pyramidal, it is due to-

1. Presence of unshared electron pairs on $I$ which is oriented so as to minimise repulsion while in $PC{l}_5$ has no non-bonding pair.
2. Octet of $P$ is complete whereas that of $I$ is incomplete.
3. $P$ and $I$ belong to different group and period.
4. Extent of different repulsion in $F$ and $I$

Q. The geometry of $S$ in $S{F}_6$ is :

1. Octahedral
2. Trigonal bipyramidal
3. Square pyramidal
4. Pentagonal planar

Q. Lone pair-lone pair repulsions are greater than bond pair-bond pair repulsions because:

1. lone pairs are localised to a single atom
2. bond pairs are localised to a single atom
3. lone pairs are delocalised between the two atoms
4. none of the above

Q. According to VSEPR theory, the most probable shape of the molecule having 4 electrons in the outershell of the central atom is:

1. linear
2. tetrahedral
3. hexahedral
4. octahedral

Q. Match the species in Column I with the shape in Column II.
$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ i.& OS{F}_2& p.& \text{Tetrahedral}\\ ii.& O_{2}S{F}_2& q.& \text{Linear}\\ iii.& Xe{F}_4& r.& \text{Square planar}\\ iv.& Cl{O}_4^{-}& s.& \text{Trigonal pyramidal}\\ v.& I_3^{-}& t.& \text{See - saw}\end{array}$

1. $i-s,ii-p,iii-r,iv-p,v-q$
2. $i-s,ii-p,iii-r,iv-q,v-t$
3. $i-s,ii-p,iii-r,iv-t,v-q$
4. $i-q,ii-r,iii-s,iv-t,v-p$

Q. Which of the following is the shape of $Xe{F}_2$?

1. Linear
2. Trigonal bipyramidal
3. See-saw shaped
4. T-shaped

Q. What may be the geometry of molecule if $A{X}_3$ molecule has non - zero dipole moment?

1. Trigonal planar
2. Bent T - shape
3. Pyramidal
4. Both (b) and (c)

Q. According to VSEPR model, the shape of $[XeO{F}_5{]}^{-}$ is

1. Octahedral
2. Trigonal bipyramidal
3. Square pyramidal
4. Pentagonal monopyramidal

Q. $O_3,N_{2}O,N{O}_2,S{O}_2,C{O}_2,SnC{l}_2,C{l}_{2}O,HCN,\stackrel{+}{N}{O}_2$
Among the following if the number of linear molecules are $x$ and the number of angular molecules are $y$. Then the value of $\frac{x}{y}$ would be

Q. In the structure of $H_{2}CS{F}_4,$ to decide the plane in which $C=S$ is present the following bond angle values are given
Axial $\angle FSF$ (idealized = ${180}^{\circ }$) $\Rightarrow {170}^{\circ }$
Equatorial $\angle FSF$ (idealized = ${120}^{\circ }$) $\Rightarrow {97}^{\circ }$
After deciding the plane of double bond which of the following statement is correct?

1. Two $C-H$ bonds are in the same plane of equatorial $S-F$ bonds
2. Total six atoms are in the same plane
3. Axial $S-F$ bonds are perpendicular to plane of $=$ bond
4. Both a and b