Shape and Geometry Using VSEPR

Q.

Which of the following are isoelectronic and isostructural?

1. ${\mathrm{NO}}_3^{-},{\mathrm{CO}}_3^{2-}$

2. ${\mathrm{SO}}_3,{\mathrm{NO}}_3^{-}$

3. ${\mathrm{ClO}}_3^{-},{\mathrm{CO}}_3^{2-}$

4. ${\mathrm{CO}}_3^{2-},{\mathrm{SO}}_3$

Q.

Draw the resonance structure of nitro benzene.

Q.

Discuss the shape of the following molecules using the VSEPR model:
$BeC{l}_2,BC{l}_3,SiC{l}_4,As{F}_5,H_{2}S,P{H}_3$

Q. Which species has maximum number of lone pair of electron in central atom?

1. $S{F}_4$
2. $I_3^{-}$
3. $Xe{F}_4$
4. All species have same number of lone pair on central atom.

Q.

Write three main postulates of VSEPR Theory.

Q.

Explain nearest neighbour in NaCl

(1st and 2nd and 3rd nearest neighbours)

Personal doubt- I am not able to upload image it says url missing

Q.

Structure of ${{\mathrm{ICl}}_2}^{-}$

1. Trigonal

2. Octahedral

3. Square planar

4. Distorted trigonal pyramidal

Q.

What is the hybridization of $\mathrm{Xe}$ in ${\mathrm{XeO}}_3$?

Q.

Explain the non-linear shape of $H_{2}S$ and non-planar shape of $PC{l}_3$ using valence shell electron pair repulsion theory.

Q. The number of ${90}^{\circ }$ bond angles in $Br{F}_5$ is :

1. 0
2. 4
3. 6
4. 8

Q. In the CsCl structure, $\frac{r^{-}}{r^{+}}=\mathrm{1.37.}$ The side length of the unit cell in terms of $r^{-}$, will be:

1. $a=2r^{-}$
2. $a=r^{-}$
3. $a=1.414r^{-}$
4. $a=4r^{-}$

Q. The spin only magnetic moment of $[MnB{r}_4{]}^{2–}$ is $5.9BM.$ Predict the geometry of the complex ion?

Q.

The molecule which has zero dipole moment is___?

1. ${\mathrm{BF}}_3$

2. ${\mathrm{NF}}_3$

3. ${\mathrm{ClO}}_2$

4. ${\mathrm{CH}}_2{\mathrm{Cl}}_2$

Q. A compound has cubical unit cell in which X atoms are present at 4 corners , Y atoms are present at the remaining corners and only at those face center(s) which is/are not opposite to each other.
The formula for the compound will be:

1. $X{Y}_4$
2. $X_{2}Y$
3. $X_{4}Y$
4. $X{Y}_2$

Q. The edge length of a face centered cubic cell of an ionic substance is $508pm$. If the radius of the cation is $110pm$, the radius of the anion is:
Assume cations at octahedral voids and anoins at FCC sites.

1. $144pm$
2. $288pm$
3. $398pm$
4. $618pm$

Q.

What is the hybridization of ${{\mathrm{SO}}_4}^{2-}$ion?

Q. The unit cell cube length for $LiCl$ $\left(NaCl\text{like structure}\right)$ is $5.14\stackrel{o}{A}.$ Assuming anion-anion is in contact, the ionic radius for chloride ion will be-

1. $1.817\stackrel{o}{A}$
2. $2.8\stackrel{o}{A}$
3. $3.8\stackrel{o}{A}$
4. $4.815\stackrel{o}{A}$

Q. Which of the following has a trigonal planar shape?

1. $I{F}_3$
2. $PC{l}_3$
3. $N{H}_3$
4. $B{F}_3$

Q.

Pls explain me the 2D structures of NaCl, CsCl, ZnS as per exam view.

Q. Which of following pair of species is having different hybridisation but same shape?

1. $BeC{l}_2$ and $C{O}_2$
2. $C{O}_2$ and $S{O}_2$
3. $S{O}_2$ and $I_3^{+}$
4. $IC{I}_2^{-}$ and $Be{H}_2$

Q.

The sample of Alf3 contains 3.0 * 10^24 f^- ions. The number of formula units of this sample are (In this question what is the meaning of formula unit?)

Q. Consider the following reaction sequence s8(g) +8o2(g)_8so2(g) how many gram of so3, are produced in 1st mole

Q. Which of the following relation is true for cubical voids?
Where, $R$ is radius of sphere
$r$ is radius of octahedral void
$a$ is edge length of unit cell

1. $2[R+r]=\sqrt{3}a$
2. $2[R+r]=\sqrt{2}a$
3. $[R+r]=a$
4. $3[R+r]=\sqrt{2}a$

Q.

Which of the following compound is not chiral?

1. ${\mathrm{DCH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{Cl}$

2. ${\mathrm{CH}}_3{\mathrm{CHDCH}}_2\mathrm{Cl}$

3. ${\mathrm{CH}}_3{\mathrm{CHClCH}}_2\mathrm{D}$

4. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CHDCl}$

Q.

The maximum degenerate orbitals in the $3^{\mathrm{rd}}$ shell of ${\mathrm{Li}}^{2+}$ is

1. $1$

2. $5$

3. $7$

4. $9$

Q.

Question 01

Isostructural species are those which have the same shape and hybridisation. Among the given species identify the isostructural pairs.

(a)$\left[N{F}_{3}andB{F}_3\right]$

(b) $\left[B{F}_4^{-}andN{H}_4^{+}\right]$

(c) $\left[BC{l}_{3}andBrC{l}_3\right]$

(d) $\left[N{H}_{3}andN{O}_3^{-}\right]$

Q.

${\mathrm{CO}}_2$is isostructural with

1. ${\mathrm{SO}}_2$

2. ${\mathrm{NO}}_2$

3. ${\mathrm{C}}_2{\mathrm{H}}_2$

4. ${\mathrm{SnCl}}_2$

Q. Back bonding in $B{F}_3$ does not affect:

1. Planarity
2. All of the above
3. Bond length
4. Lewis acidity

Q.

The species having pyramidal shape is

1. $S{O}_3$

2. $Br{F}_3$

3. $Si{O}_3^{2-}$

4. $OS{F}_2$

Q.

Should I know Chemical Bonding before starting Organic part? Or what is the pre-requisite for organic part? Please Reply soon