Bond Length

Q.

A certain element crystallizes in a $\mathrm{bcc}$ lattice of unit cell edge length $27\stackrel{\circ }{\mathrm{A}}.$ If the same element under the same conditions crystallises in the $\mathrm{fcc}$ lattice, the edge length of the unit cell in $\stackrel{\circ }{\mathrm{A}}$ will be __________. (Round off to the nearest Integer).

(Assume each lattice point has a single atom)

(Assume $\sqrt{3}=1.73,\sqrt{2}=1.41$)

Q.

Arrange the following sets of compounds in order of their increasing boiling points:

$A$: Pentan-1-ol, butan-1-ol, butan-2-ol, ethanol, propan-1-ol, methanol

$B$: Pentan-1-ol, n-butane, pentanal, ethoxyethane

Q. Which of the following hydrogen bond is strongest?

1. F-H-----F
2. O-H------O
3. O-H----F
4. O-H-------N

Q. The correct order in which the $O-O$ bond length increases in the following is:

1. $H_2{O}_2<O_2<O_3$
2. $O_3<H_2{O}_2<O_2$
3. $O_2<H_2{O}_2<O_3$
4. $O_2<O_3<H_2{O}_2$

Q. Arrange $N{O}_2^{+},N{O}_2^{-}$ and $N{O}_3^{-}$ in the decreasing order of their $N-O$ bond lengths.

1. $N{O}_2^{-}>N{O}_3^{-}>N{O}_2^{+}$
2. $N{O}_3^{-}>N{O}_2^{-}>N{O}_2^{+}$
3. $N{O}_2^{+}>N{O}_3^{-}>N{O}_2^{-}$
4. $N{O}_3^{-}>N{O}_2^{+}>N{O}_2^{-}$

Q.

Define the bond length.

Q. In which of the following are the bonds non-directional in nature?

1. 
2. 
3. 
4. 

Q. The number of electrons that are paired in oxygen molecule is

1. 7

2. 16

3. 8

4. 14

Q. What does it mean to have directional character of bond?

Q.

Which of the following complexes have the longest M-C bond length?

1. $[\mathrm{Mn}{\left(\mathrm{CO}\right)}_6{]}^{+}$

2. $\left[\mathrm{Cr}{\left(\mathrm{CO}\right)}_6\right]$

3. $\left[\mathrm{Fe}{\left(\mathrm{CO}\right)}_5\right]$

4. $[\mathrm{V}{\left(\mathrm{CO}\right)}_6{]}^{-}$

Q. Explain why Cl-Cl bond is stronger than F-F bond?

Q. Does a C2 bond exist? And is it stable, if yes what is its VSEPR structure?

Q.

Which of the following is true for inductive effect?

1. Inductive effect is a permanent effect.

2. Inductive effect operates through bonds.

3. Polarisation of electrons is always in single direction

4. None of these

Q. Write the structural formula of
(a) $\text{o-Ethylanisole}$
(b) $\text{p-Nitroaniline}$
(c) $\text{2, 3-Dibromo-1-phenylpentane}$

Q. Among the following, the number of halide(s) inert to hydrolysis is _____.
(a) $B{F}_3$
(b) $SiC{l}_4$
(c) $PC{l}_5$
(d) $S{F}_6$

Q.

The AsF₅ molecule is trigonal bipyramidal. The hybrid orbitals used by the As atoms for bonding are:

1. ${\mathrm{dx}}^2-{\mathrm{y}}^2,{{\mathrm{d}}_{\mathrm{z}}}^2,\mathrm{s},\mathrm{px},\mathrm{py}$

2. $\mathrm{dxy},\mathrm{s},\mathrm{px},\mathrm{py},\mathrm{pz}$

3. ${\mathrm{dx}}^2-{\mathrm{y}}^2,\mathrm{s},\mathrm{px},\mathrm{py}$

4. s, px, py, pz, dz²

Q.

Are Double Bonds Nucleophilic Or Electrophilic ?

Q. Select the correct order of bond angle of the following species.
$Cl{O}_3^{-},Br{O}_3^{-},I{O}_3^{-}$

1. $Br{O}_3^{-}>I{O}_3^{-}>Cl{O}_3^{-}$
2. $Cl{O}_3^{-}>Br{O}_3^{-}>I{O}_3^{-}$
3. $I{O}_3^{-}>Br{O}_3^{-}>Cl{O}_3^{-}$
4. $I{O}_3^{-}<Br{O}_3^{-}>Cl{O}_3^{-}$

Q. Which one is the correct order of acidity ?

1. $C{H}_2=C{H}_2>C{H}_3-CH=C{H}_2>C{H}_3-C\equiv CH>CH\equiv CH$
2. $CH\equiv CH>C{H}_3-C\equiv CH>C{H}_2=C{H}_2>C{H}_3-C{H}_3$
3. $CH\equiv CH>C{H}_2=C{H}_2>C{H}_3-C\equiv CH>C{H}_3-C{H}_3$
4. $C{H}_3-C{H}_3>C{H}_2=C{H}_2>C{H}_3-C=CH>CH\equiv CH$

Q.

Write the names of two allotropes of phosphorus.

Q.

What amount of bromine will be required to convert $2\mathrm{gm}$ of Phenol Into $2,4,6-\mathrm{Tribromophenol}$?

1. $4.00$

2. $2.00$

3. $10.22$

4. $6.00$

Q.

Can double-bonded oxygen partake in hydrogen bonding?

Q.

Covalent bonds can undergo fission in two different ways. The correct representation involving a heterolytic fission of $C{H}_3–Br$ is

1. $\curvearrowright$ $\oplus$ $\ominus$
   $C{H}_3-Br\to C{H}_3+Br$
2. $\curvearrowright$ $\ominus$ $\oplus$
   $C{H}_3-Br\to C{H}_3+Br$
3. $\curvearrowleft$ $\oplus$ $\ominus$
   $C{H}_3-Br\to C{H}_3+Br$
4. $\curvearrowleft \curvearrowright$ $\bullet$ $\bullet$
   $C{H}_3-Br\to C{H}_3+Br$

Q.

If the distance between ${\mathrm{Na}}^{+}$ and ${\mathrm{Cl}}^{-}$ ions in $\mathrm{NaCl}$ crystals is a pm. What is the length of the edge of the unit cell?

1. $2\mathrm{a}\mathrm{pm}$

2. $4\mathrm{a}\mathrm{pm}$

3. $\frac{\mathrm{a}}{2}\mathrm{pm}$

4. $\frac{\mathrm{a}}{4}\mathrm{pm}$

Q. The length of the unit cell edge of a bcc lattice metal is $350pm$. What is the volume of atoms in one mole of the metal?

1. $8.79c{m}^3$
2. $6.25c{m}^3$
3. $1.21c{m}^3$
4. $4.00c{m}^3$

Q. The factors that affect the bond length are:

1. Size of the atom
2. Hybridization
3. Bond Order
4. All of the above

Q.

State the type of bond present in Carbon tetrachloride.

Q.

Which molecule has a $120°$bond angle?

Q. Compare the bond lengths (x and y) in the following molecules:

1. $x=y$
2. None of these
3. $x>y$
4. $y>x$

Q. Which of the given statements is/are correct:

1. The $C-Cl$ bond length in $C{H}_{3}C{H}_{2}Cl$ is $1.76\stackrel{\circ }{A}$ and $C{H}_2=CHCl$ is $1.69\stackrel{\circ }{A}$
2. The $C=C$ bond length in $C{H}_2=C{H}_2$ is $1.34\stackrel{\circ }{A}$ and $C{H}_2=CHCl$ is $1.38\stackrel{\circ }{A}$
3. The $C-C$ bond length in $C{H}_2=C{H}_2,C{H}_{3}C{H}_2-Cl$ and $C{H}_2=CHCl$ is $1.54\stackrel{\circ }{A}$
4. The dipole moment of $C{H}_{3}C{H}_{2}Cl$ is greater than $C{H}_2=CHCl$