Repulsions

Q. The correct order of decreasing $X-O-X$ bond angle is:

1. $C{l}_{2}O>H_{2}O>F_{2}O$
2. $F_{2}O>C{l}_{2}O>H_{2}O$
3. $F_{2}O>H_{2}O>C{l}_{2}O$
4. $C{l}_{2}O>F_{2}O>H_{2}O$

Q.

Which of the following nonmetal is lustrous?

1. Iodine

2. Oxygen

3. Sulphur

4. Nitrogen

Q.

Is it possible for a single atom to exhibit both covalency and electrovalency?.Discuss with appropriate examples.

Q. Which of the following is cationic complexes?

1. $K_2\left[Cd\right(CN{)}_4]$
2. $\left[Cu\right(N{H}_3{)}_4]S{O}_4$
   
3. $K_3\left[Fe\right(CN{)}_6]$
4. $\left[Ni\right(CO{)}_4]$

Q. Number of lone pair-bond pair repulsion at ${90}^{\circ }$ are (P) in $I_3^{-}$

Q. Which of the following(s) is/are anionic complexes?

1. $K_2\left[Cd\right(CN{)}_4]$

2. $\left[Cu\right(N{H}_3{)}_4]S{O}_4$
   
3. $K_3\left[Fe\right(CN{)}_6]$
4. $\left[Ni\right(CO{)}_4]$

Q.

Dipole-dipole forces act between molecules possessing ___________.

Q. Which of the following is anionic complexes?

1. $\left[Cu\right(N{H}_3{)}_4]S{O}_4$
   
2. $K_3\left[Fe\right(CN{)}_6]$
3. $\left[Ni\right(CO{)}_4]$
4. None of the above

Q.

Why are ionic bonds the weakest?

Q. From chloral, DDT, pyrene, gammexane which has the highest chlorine content?

Q. In $IC{l}_4^{\ominus }$ the shape is square planar. The number of bond pair-lone pair repulsion at ${90}^{\circ }$ are:

1. $6$
2. $8$
3. $12$
4. $4$

Q. Which of the following is not correctly matched with respect to the intermolecular forces existing amongst the molecules?

1. Benzene: London dispersion forces
2. $H_{3}P{O}_4$: London dispersion force, hydrogen bonding
3. $HCl$: London dispersion force, dipole- dipole attraction
4. $ICl$: London dipersion force, Hydrogen bonding

Q.

Which among the following is not attracted towards a charged plate?

1. Water

2. Ammonia

3. Hydrochloric acid

4. Bromine

Q. $C-O-C$ angle in ether molecule is :

1. ${110}^{\circ }$
2. ${180}^{\circ }$
3. ${109}^{\circ }{28}^{\prime }$
4. ${90}^{\circ }$

Q. Hydrogen bond formation takes place between the hydrogen atom and an atom having high__________.

1. electronaffinity
2. electronegativity
3. atomic size
4. ionization potential

Q. Which of the following factor(s) affect bond length?

1. Bond order.
2. Size of atoms making the bond.
3. Percentage s-character in the orbitals used in making the bond.
4. Oxidation number of central atom.

Q. Which of the following has the longest metal-carbon $(M-C)$ bond length?

1. $Ni(CO{)}_4$
2. $\left[Co\right(CO{)}_4{]}^{-}$
3. $\left[Mn\right(CO{)}_6{]}^{+}$
4. $\left[Fe\right(CO{)}_4{]}^{2-}$

Q. Which of the following species does /do not exist?

1. $O{F}_4$
2. $NC{l}_5$
3. $N{H}_2^{-}$
4. $IC{I}_3^{2-}$

Q. In $H_{2}O$, the bond angle HOH is ${104}^{\circ }{28}^{\prime }$ but in $H_{2}S,H_{2}Se$ and $H_{2}Te$ the bond angles are pretty close to ${90}^{\circ }$. This suggests that:

1. oxygen uses $s{p}^2$-hybrid orbitals while $S,Se$ and $Te$ use $s{p}^3$-hybrid orbitals for bonding with the hydrogen atoms
2. oxygen uses $s{p}^3$-hybrid orbitals to bond with the two hydrogen atoms while $S,Se$ and $Te$ use almost pure p orbitals
3. oxygen uses $s{p}^3$-hybrid orbitals while $S,Se$ and $Te$ utilize d orbitals for bonding with the hydrogen atoms
4. all the atoms use pure p orbitals to bond with the hydrogen atoms

Q. ___________ is present among the molecules of $HCl$.

1. Electrostatic force
2. Hydrogen bond
3. Dipole-dipole attraction
4. All of the above

Q. In which of the following the repulsion is least?

1. 

2. 

3. 

4. All of these have same repulsion

Q. Give reason
(a) Plasma is found in the stars.
(b) The molecules of a solid have the strongest intermolecular forces.

Q. If true enter 1, else enter 0.
The bond strength increases as the number of lone pairs on neighbouring atoms increases.

1. 0
2. 1
3. none
4. both

Q. Steric number of the central atom in $I{F}_4^{-}$ is 6.
If true enter 1, else enter 0.

Q. which if the following has zero dipole moment : chloromethane ; dichloromethane ; trichloromethane ; tetrachloromethane

Q. In which of the following the repulsion is least?

1. 

2. 

3. 

4. All of these have same repulsion

Q. Which among the following substances possess only vanderwaal's forces of attraction?

1. Argon
2. Carbon disulphide
3. Hydrogen fluoride
4. Lead

Q. The correct order of bond angles is :

1. $H_{2}S<N{H}_3<B{F}_3<Si{H}_4$
2. $N{H}_3<H_{2}S<Si{H}_4<B{F}_3$
3. $H_{2}S<Si{H}_4<N{H}_3<B{F}_3$
4. $H_{2}S<N{H}_3<Si{H}_4<B{F}_3$

Q. The correct order of decreasing $X-O-X$ bond angle is:

1. $C{l}_{2}O>F_{2}O>H_{2}O$
2. $C{l}_{2}O>H_{2}O>F_{2}O$
3. $F_{2}O>H_{2}O>C{l}_{2}O$
4. $F_{2}O>C{l}_{2}O>H_{2}O$