| Chapter-4: Chemical Bonding and Molecular Structure |
1. The hybrid state of sulphur in SO2 molecule is :
- sp²
- sp³
- sp
- sp³d
[su_spoiler title=”Answer ” style=”fancy”] sp² [/su_spoiler]
2. Which one of the following does not have sp² hybridised carbon?
- Acetone
- Acetic acid
- Acetonitrile
- Acetamide
[su_spoiler title=”Answer ” style=”fancy”] Acetonitrile [/su_spoiler]
3. Which one of the following is paramagnetic?
- NO+
- CO
- O2–
- CN
[su_spoiler title=”Answer ” style=”fancy”] O2– [/su_spoiler]
4. In which of the following , the angle around the central atom is largest?
- CS2
- SF4
- SO2
- BBR3
[su_spoiler title=”Answer ” style=”fancy”] SF4 [/su_spoiler]
5. In which of the following substances, the intermolecular forces are hydrogen bonds?
- Hydrogen Chloride
- Hydrogen Sulphide
- Dry Ice
- Ice
[su_spoiler title=”Answer ” style=”fancy”] Ice [/su_spoiler]
6. The weakest interparticle forces are found in which of the following?
- Ionic Solids
- Metallic Solids
- Molecular Solids
- All types of solids are equal in terms of interparticle forces.
[su_spoiler title=”Answer ” style=”fancy”] Molecular Solids [/su_spoiler]
7. Which of the following structures will have a bond angle of 120° around the central atom?
- Linear
- Tetrahedral
- Triangular
- Square planar
[su_spoiler title=”Answer ” style=”fancy”] Triangular [/su_spoiler]
8. Based on VSEPR theory, the number of 90° F-Br-F angles in BrF5 is
- 0
- 4
- 2
- 8
[su_spoiler title=”Answer ” style=”fancy”] 0 [/su_spoiler]
9. Based on lattice enthalpy and other considerations which one the following alkali metals chlorides is expected to have the higher melting point?
- RbCl
- KCl
- NaCl
- LiCl
[su_spoiler title=”Answer ” style=”fancy”] NaCl [/su_spoiler]
10. Which one of the following pairs of species have the same bond order?
- CN− and NO+
- CN− and CN+
- O2− and CN−
- NO+ and CN+
[su_spoiler title=”Answer ” style=”fancy”] NO+ and CN+ [/su_spoiler]
11. The state of hybridization of the central atom and the number of lone pairs over the central atom in POCl3 are
- sp, 0
- sp², 0
- sp³, 0
- dsp², 1
[su_spoiler title=”Answer ” style=”fancy”] sp³, 0 [/su_spoiler]
12. Which of the following species contain non-directional bonds ?
- NCl3
- BeCl2
- BCl3
- RbCl
[su_spoiler title=”Answer ” style=”fancy”] BeCl2 [/su_spoiler]
13. The number of types of bonds between two carbon atoms in calcium carbide is
- Two sigma, two pi
- One sigma, two pi
- One sigma, one pi
- Two sigma, one pi
[su_spoiler title=”Answer ” style=”fancy”] One sigma, two pi [/su_spoiler]
14. Which of the following types of hybridisation leads to three dimensional geometry of bonds around the carbon atom ?
- sp
- sp²
- sp³
- None of these
[su_spoiler title=”Answer ” style=”fancy”] sp² [/su_spoiler]
15. In allene (C3H4), the type(s) of hybridisation of the carbon atoms is (are)
- sp and sp³
- sp and sp²
- Only sp²
- sp² and sp³
[su_spoiler title=”Answer ” style=”fancy”] sp and sp² [/su_spoiler]