Chapter 13

A Complete Resource Book in Chemistry for JEE Main · 168 exercises

Problem 125

Consider the following statements: 1\. the bond order of $\mathrm{NO}$ is $2.5$ 2\. the bond order of $\mathrm{NO}^{+}$is 3 3\. the bond order of $\mathrm{O}_{2}$ is $1.5$ 4\. the bond order of $\mathrm{CO}$ is 3 Which of these statements are correct? (a) 1,2 and 3 (b) 2,3 and 4 (c) 1,3 and 4 (d) 1,2 and 4

6 step solution

Problem 127

Match the following: $\begin{array}{ll}\text { List I } & \text { List II }\end{array}$ (Species) (Hybridization) 1\. $\mathrm{BCI}_{3}$ (i) $\mathrm{sp}^{3}$ 2\. $\mathrm{NH}_{3}$ (ii) $\mathrm{sp}^{3} \mathrm{~d}^{2}$ 3\. $\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}$ (iii) $\mathrm{sp}^{2}$ 4\. $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ (iv) $\mathrm{sp}^{2} \mathrm{~d}$

4 step solution

Problem 128

Match the following: List I (Compounds) 1\. $\mathrm{CS}_{2}$ 2\. $\mathrm{SO}_{2}$ 3\. $\mathrm{BF}_{3}$ 4\. $\mathrm{NH}_{3}$ List II (Structures) (i) Bent (ii) Linear (iii) Trigonal planar (iv) Tetrahedral (v) Trigonal pyramidal

2 step solution

Problem 129

Which of the following types of bonds are present in $\mathrm{CuSO}_{4} \cdot 5 \mathrm{H}_{2} \mathrm{O} ?$ (1) electrovalent (2) covalent (3) coordinate Select the correct answer using the code given below. (a) 1 and 2 only (b) 1 and 3 only (c) 1,2 and 3 (d) 2 and 3 only

4 step solution

Problem 130

In which one of the following pairs, molecules/ions have similar shape? (a) $\mathrm{CCl}_{4}$ and $\mathrm{PtCl}_{4}$ (b) $\mathrm{NH}_{3}$ and $\mathrm{BF}_{3}$ (c) $\mathrm{BF}_{3}$ and $\mathrm{t}$-butyl carbonium ion (d) $\mathrm{CO}_{2}$ and $\mathrm{H}_{2} \mathrm{O}$

5 step solution

Problem 131

Which of the following are non-polar? (1) $\mathrm{SiF}_{4}$ (2) $\mathrm{XeF}_{4}$ (3) $\mathrm{SF}_{4}$ (4) $\mathrm{BF}_{3}$ (5) $\mathrm{NF}_{3}$ Select the correct answer using the code given below: (a) 1,2 and 4 (b) 3,4 and 5 (c) 2,3 and 4 (d) 1,3 and 4

4 step solution

Problem 132

Consider the following type of bonds: (1) ionic (2) covalent (3) coordinate (4) hydrogen bond Which type of bonds are present in $\mathrm{NaHCO}_{3} ?$ (a) 1 and 3 (b) 2 and 4 (c) 1 and 2 (d) 1,2 and 3

6 step solution

Problem 133

Match the following: List I (Molecule) 1\. $\mathrm{BF}_{3}$ 2\. $\mathrm{NF}_{3}$ 3\. $\mathrm{PF}_{3}$ 4\. $\mathrm{ClF}_{3}$ List II (Bond angle) (i) $88^{\circ}$ (ii) $96^{\circ}$ (iii) $103^{\circ}$ (iv) $110^{\circ}$ (v) $120^{\circ}$

3 step solution

Problem 135

Consider the following type of energies and decide the correct order of magnitude. 1\. covalent single bond energy 2\. average translational kinetic energy of gases at room temperature 3\. rotational barrier energy in ethane between eclipsed and staggered forms 4\. ionization energy of hydrogen atom (a) $4>1>3>2$ (b) $4>1>2>3$ (c) $2>1>4>3$ (d) $4>3>2>1$

5 step solution

Problem 136

Which of the following species have undistorted octahedral structures? (1) $\mathrm{SF}_{6}$ (2) $\mathrm{PF}_{6}^{-}$ (3) $\mathrm{SiF}_{6}^{2}$ (4) $\mathrm{XeF}_{6}$ Select the correct answer using the codes given below: (a) 1,3 and 4 (b) 1,2 and 3 (c) 1,2 and 4 (d) 2,3 and 4

6 step solution

Problem 137

Consider the given statements about the molecule $\left(\mathrm{H}_{3} \mathrm{C}\right)_{2} \mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}=\mathrm{CH}_{2} .$ 1\. Three carbon atoms are sp $^{3}$ hybridized 2\. Three carbon atoms are sp $^{2}$ hybridized 3\. Two carbon atoms are sp hybridized Of three statements (a) 1 and 2 are correct (b) 1 and 3 are correct (c) 2 and 3 are correct (d) 1,2 and 3 are correct

6 step solution

Problem 138

Match the following:. List I (Species) 1\. $\mathrm{O}_{2}^{2+}$ 2\. $\mathrm{O}_{2}$ 3\. $\mathrm{F}_{2}$ 4\. $\mathrm{O}_{2}^{+}$ List II (Bond order) (i) $1.0$ (ii) $2.0$ (iii) $2.5$ (iv) $3.0$

5 step solution

Problem 141

Consider the following halogen containing compounds (i) $\mathrm{CHCl}_{3}$ (ii) $\mathrm{CCl}_{4}$ (iii) $\mathrm{CH}_{2} \mathrm{Cl}_{2}$ (iv) $\mathrm{CH}_{3}^{+} \mathrm{Cl}$ (v) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{Cl}_{2}$ The compounds with a net zero dipole moment are (a) (ii) and (v) only (b) (iii) only (c) (iii) and (iv) only (d) (iv) only

4 step solution

Problem 142

The electronegativity difference between $\mathrm{N}$ and $\mathrm{F}$ is greater than that between $\mathrm{N}$ and $\mathrm{H}$, yet the dipole moment of $\mathrm{NH}_{3}(1.5 \mathrm{D})$ is larger than that of $\mathrm{NF}_{3}$ $(0.2 \mathrm{D})$ This is because (a) in $\mathrm{NH}_{3}$ as well as $\mathrm{NF}_{3}$ the atomic dipole and bond dipole are in opposite directions (b) in $\mathrm{NH}_{3}$ the atomic dipole and bond dipole are in the opposite directions whereas in $\mathrm{NF}_{3}$ these are in the same direction (c) in $\mathrm{NH}_{3}$ as well as in $\mathrm{NF}_{3}$ the atomic dipole and bond dipole are in same direction (d) in $\mathrm{NH}_{3}$ the atomic dipole and bond dipole and in the same direction whereas in $\mathrm{NF}_{3}$ these are in opposite directions

5 step solution

Problem 143

According to molecular orbital theory which of the following statement about the magnetic character and bond order is correct regarding $\mathrm{O}_{2}^{+} ?$ (a) paramagnetic and bond order $<\mathrm{O}_{2}$ (b) paramagnetic and bond order $>\mathrm{O}_{2}$ (c) diamagnetic and bond order $<\mathrm{O}_{2}$ (d) diamagnetic and bond order $>\mathrm{O}_{2}$

5 step solution

Problem 145

Arrange the following compounds in order of increasing dipole moment 1\. Toluene, 2\. m-dichlorobenzene 3\. o-dichlorobenzene, 4\. p-dichlorobenzene (a) $1<4<2<3$ (b) $4<1<2<3$ (c) $4<1<3<2$ (d) $4<2 \leq 1<3$

6 step solution

Problem 146

Species having the same bond order are (a) $\mathrm{N}_{2}$ (b) $\mathrm{N}_{2}^{+}$ (c) $\mathrm{N}_{2}^{-}$ (d) $\mathrm{N}_{2}^{2-}$

6 step solution

Problem 147

Mark out the incorrect match of shape for a given molecule/ion. (a) $\mathrm{ICl}_{4}^{-}-$square planar (b) $\mathrm{NH}_{2}^{-}-$Pyramidal (c) $\mathrm{SF}_{4}-$ See $-$ saw shape (d) $\mathrm{XeOF}_{2}-$ Trigonal planar

5 step solution

Problem 148

Which of the pairs have identical values of bond order? (a) $\mathrm{F}_{2}$ and $\mathrm{Ne}_{2}$ (b) $\mathrm{N}_{2}^{+}$and $\mathrm{O}_{2}^{+}$ (c) $\mathrm{O}_{2}^{2-}$ and $\mathrm{B}_{2}$ (d) $\mathrm{C}_{2}$ and $\mathrm{N}_{2}$

13 step solution

Problem 149

Isostructural group of molecule is (a) $\mathrm{XeO}_{4}, \mathrm{NH}_{4}^{+}, \mathrm{CH}_{4}$ (b) $\mathrm{CH}_{3}^{-}, \mathrm{NH}_{3}, \mathrm{NF}_{3}$ (c) $\mathrm{NH}_{3}, \mathrm{NF}_{3}, \mathrm{BF}_{3}$ (d) $\mathrm{NO}_{3}, \mathrm{NO}_{2}, \mathrm{SF}_{4}$

6 step solution

Problem 150

The correct statements if the following are: (a) The bond angle of hybrid bonds increases as $\mathrm{sp}^{3}<$ \(s p^{2}

~~3 step solution~~

Problem 151
In $\mathrm{O}_{2}$ molecule which of the following molecular orbitals are lower in energy than $\sigma 2 \mathrm{p}_{\mathrm{z}}$ orbital (a) $\sigma 2 \mathrm{~s}$ (b) $\pi_{2 \mathrm{~m} \mathrm{x}}$ (c) $\pi_{2 \mathrm{py}}$ (d) $\sigma^{*} 2 \mathrm{~s}$
4 step solution
Problem 152
Which combination of the compound and their shapes are correct? (a) $\mathrm{ClF}_{3}$ - see saw (b) $\mathrm{ICl}_{4}^{-}-$square planar (c) $\mathrm{ICl}_{3}-\mathrm{T}$ - shaped (d) $\mathrm{I}_{3}^{-}$- linear
5 step solution
Problem 153
Which of the following species have bond order $3 ?$ (a) $\mathrm{CN}^{-}$ (b) $\mathrm{O}_{2}^{-}$ (c) $\mathrm{NO}^{+}$ (d) $\mathrm{CO}$
6 step solution
Problem 156
When anions and cations approach each other, the valence shell of anions are pulled towards cation nucleus and thus, shape of anion is deformed. The phenomenon of deformation of anion by a cation is known as polarization and the ability of the cation to polarize the anion is called as polarizing power of cation. Due to polarization, sharing of electrons occurs between two ions to some extent and the bond shows some covalent character. Considering $\mathrm{BeCl}_{2}, \mathrm{MgCl}_{2}, \mathrm{CaCl}_{2}$ and $\mathrm{BaCl}_{2}$, predict which of the following statement is true? (a) Covalent character increases as the atomic number of the metal atom increases (b) $\mathrm{BeCl}_{2}$ is least ionic out of the given chlorides. (c) $\mathrm{BeCl}_{2}$ has the highest melting point among the given chlorides. (d) All are highly ionic compound.
4 step solution
Problem 158
When anions and cations approach each other, the valence shell of anions are pulled towards cation nucleus and thus, shape of anion is deformed. The phenomenon of deformation of anion by a cation is known as polarization and the ability of the cation to polarize the anion is called as polarizing power of cation. Due to polarization, sharing of electrons occurs between two ions to some extent and the bond shows some covalent character. Which is most volatile in nature? (a) $\mathrm{AlCl}_{3}$ (b) $\mathrm{CaCl}_{2}$ (c) $\mathrm{NaCl}$ (d) $\mathrm{MgCl}_{2}$
5 step solution
Problem 159
When two oppositely charged ions approach each other, the ion smaller in size attracts outermost electrons of the other ion and repels its nuclear charge. The electron cloud of anion no longer remains symmetrical but is elongated towards the cation. Due to that, sharing of electrons occur between the two ions to some extent and the bond shows some covalent character. The value of dipole moment can be used for determining the amount of ionic character in a bond. Thus, percentage ionic character = $\frac{\text { Experimental value of dipole moment }}{\text { Theoretical value of dipole moment }} \times 100$ Which one of the following compounds shows most covalent character? (a) $\mathrm{MgCl}_{2}$ (b) $\mathrm{AlCl}_{3}$ (c) $\mathrm{NaCl}$ (d) All are equally covalent
4 step solution
Problem 161
When two oppositely charged ions approach each other, the ion smaller in size attracts outermost electrons of the other ion and repels its nuclear charge. The electron cloud of anion no longer remains symmetrical but is elongated towards the cation. Due to that, sharing of electrons occur between the two ions to some extent and the bond shows some covalent character. The value of dipole moment can be used for determining the amount of ionic character in a bond. Thus, percentage ionic character = $\frac{\text { Experimental value of dipole moment }}{\text { Theoretical value of dipole moment }} \times 100$ The dipole moment of $\mathrm{LiH}$ is $1.964 \times 10^{-29} \mathrm{C} . \mathrm{m}$. and the interatomic distance between $\mathrm{Li}$ and $\mathrm{H}$ in this molecule is $1.596 \AA$. What is the \% ionic character in $\mathrm{LiH}$ ? (a) $76.8 \%$ (b) $60.25 \%$ (c) $15.5 \%$ (d) $26.2 \%$
4 step solution
Problem 162
Match the following $$ \begin{array}{ll} \hline \text { Column-I } & \text { Column-II } \\ \hline \begin{array}{ll} \text { (a) } \mathrm{NH}_{2}^{-} & \text {(p) Bent shape } \\ \text { (b) } \mathrm{XeF}_{4} & \text { (q) } \mathrm{AB}_{2} \mathrm{E}_{2} \\\ \text { (c) } \mathrm{CH}_{3}^{-} & \text {(r) } \mathrm{sp}^{3} \text { hybridization } \\ \text { (d) } \mathrm{NO}_{2}^{-} & \text {(s) square planar } \\ & \text { (t) lone pair } \\ \hline \end{array} \end{array} $$
6 step solution
Problem 164
Match the following \begin{tabular}{ll} \hline Column-I & Column-II \\ \hline (a) $\mathrm{KHF}_{2}$ & (p) Compound can exist \\ (b) $\mathrm{KHCl}_{2}$ & (q) Compound is electrolyte in nature \\ (c) $\mathrm{NF}_{3}$ & (r) Compound shows hydrogen \\ (d) $\mathrm{PH}_{5}$ & (s) Compound is non electrolyte \\ & (t) Compound can not exist. \\ \hline \end{tabular}
4 step solution
Problem 169
The number of $\sigma$ bonds in 1 -buten-3-yne is
5 step solution
Problem 170
Of the following, the number of species having two and more than two electrons in the antibonding molecular orbital is__ $\mathrm{He}_{2}, \mathrm{He}_{2}^{+}, \mathrm{B}_{2}, \mathrm{O}_{2}^{-}, \mathrm{N}_{2}^{-}$
7 step solution
Problem 172
Among $\mathrm{BF}_{3}, \mathrm{NF}_{3}, \mathrm{PH}_{3}, \mathrm{IF}_{3}, \mathrm{IF}_{5}$ and $\mathrm{SF}_{4}$, the number of species having the same number of lone pair of electrons on the central atom is
4 step solution
Problem 175
Of the following the number of species having unpaired electron are $\mathrm{B}_{2}, \mathrm{KO}_{2}, \mathrm{BaO}_{2}, \mathrm{NO}_{2}, \mathrm{O}_{2}, \mathrm{ClO}_{2}, \mathrm{O}_{2}\left[\mathrm{AsF}_{6}\right]$
5 step solution
Problem 176
Find the total number of pr-d $\pi$ bonds present in $\mathrm{XeO}_{4}$.
5 step solution
Problem 179
In trimer form of sulphur trioxide, each sulphur atom is bonded to $\quad \mathrm{O}$ atoms.
4 step solution
Problem 180
Of the following, the number of species having unpaired electron are $\mathrm{B}_{2}, \mathrm{KO}_{2}, \mathrm{BaO}_{2}, \mathrm{NO}_{2}, \overline{\mathrm{O}_{2}, \mathrm{NO}}, \mathrm{ClO}_{2}, \mathrm{O}_{2}\left[\mathrm{AsF}_{6}\right]$
7 step solution
Problem 181
Number of $\mathrm{P}-\mathrm{O}$ bonds in $\mathrm{P}_{4} \mathrm{O}_{10}$ is (a) 17 (b) 16 (c) 15 (d) 6
4 step solution
Problem 182
Bond angle of $109^{\circ} 28$ ' is found in (a) $\mathrm{NH}_{3}$ (b) $\mathrm{H}_{2} \mathrm{O}$ (c) $\mathrm{CH}_{3}$ (d) $\mathrm{NH}_{4}^{+}$
6 step solution
Problem 183
Hybridization of the underlined atom changes in which of the following transitions? (a) $\mathrm{AIH}_{3}$ changes to $\mathrm{AlH}_{4}^{-}$ (b) $\mathrm{H}_{2} \underline{\mathrm{O}}$ changes to $\mathrm{H}_{3} \mathrm{O}^{+}$ (c) $\mathrm{NH}_{3}$ changes to $\mathrm{NH}_{4}^{+}$ (d) in all cases
3 step solution
Problem 184
The number of lone pairs on $\mathrm{Xe}$ in $\mathrm{XeF}_{2}, \mathrm{XeF}_{4}$ and $\mathrm{XeF}_{6}$ respectively are (a) $3,2,1$ (b) $2,4,6$ (c) $1,2,3$ (d) $6,4,2$
4 step solution
Problem 185
A square planar complex is formed by hybridization of the following atomic orbitals (a) s, $\mathrm{p}_{\mathrm{x}}, \mathrm{p}_{y}, \mathrm{p}_{z}$ (b) $s, p_{x}, p_{y}, p_{z}, d$ (c) $\mathrm{d}_{x^{2}-y^{2}}, \mathrm{~s}, \mathrm{p}_{x}, \mathrm{p}_{\mathrm{y}}$ (d) $\mathrm{s}, \mathrm{p}_{\mathrm{x}}, \mathrm{p}_{y}, \mathrm{p}_{2}, \mathrm{~d}_{z^{2}}$
6 step solution
Problem 187
Select correct statement: (a) when a covalent bond is formed, transfer of electrons takes place (b) pure $\mathrm{H}_{2} \mathrm{O}$ does not contain any ion (c) a bond is formed when attractive forces overcome repulsive forces (d) HF is less polar than $\mathrm{HBr}$
4 step solution
Problem 188
Which one of the following compounds has the smallest bond angle in its molecule? (a) $\mathrm{SO}_{2}$ (b) $\mathrm{H}_{2} \mathrm{O}$ (c) $\mathrm{H}_{2} \mathrm{~S}$ (d) $\mathrm{NH}_{3}$
4 step solution
Problem 189
Which one of the following pairs of molecules will have permanent dipole moments for both members? (a) $\mathrm{SiF}_{4}$ and $\mathrm{NO}_{2}$ (b) $\mathrm{NO}_{2}$ and $\mathrm{CO}_{2}$ (c) $\mathrm{NO}_{2}$ and $\mathrm{O}_{3}$ (d) $\mathrm{SiF}_{4}$ and $\mathrm{CO}_{2}$
4 step solution
Problem 190
The pair of species having identical shapes for molecules of both species is (a) $\mathrm{CF}_{4}, \mathrm{SF}_{4}$ (b) $\mathrm{XeF}_{2}, \mathrm{CO}_{2}$ (c) $\mathrm{BF}_{3}^{4}, \mathrm{PCl}_{3}$ (d) $\mathrm{PF}_{5}, \mathrm{IF}_{5}$
3 step solution
Problem 192
The bond order in $\mathrm{NO}$ is $2.5$ while that in $\mathrm{NO}^{+}$is 3 . Which of the following statements is true for these two species? (a) bond length in $\mathrm{NO}^{+}$is greater than in $\mathrm{NO}$ (b) bond length in $\mathrm{NO}$ is greater than in $\mathrm{NO}^{+}$ (c) bond length in $\mathrm{NO}^{+}$is equal than in NO (d) bond length is unpredictable
5 step solution
Problem 194
The maximum number of $90^{\circ}$ angles between bond pair-bond pair of electrons is observed in (a) sp $^{3} \mathrm{~d}^{2}$ hybridization (b) $\mathrm{sp}^{3} \mathrm{~d}$ hybridization (c) $\mathrm{dsp}^{3}$ hybridization (d) $\mathrm{dsp}^{2}$ hybridization
6 step solution
Problem 195
Which one of the following species is diamagnetic in nature? (a) $\mathrm{H}_{2}^{-}$ (b) $\mathrm{H}_{2}$ (c) $\mathrm{H}_{2}^{+}$ (d) $\mathrm{He}_{2}^{+}$
6 step solution
Problem 196
Which one of the following species is diamagnetic in nature? (a) $\mathrm{H}_{2}^{-}$ (b) $\mathrm{H}_{2}$ (c) $\mathrm{H}_{2}^{+}$ (d) $\mathrm{He}_{2}^{+}$
3 step solution

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