The potential energy (y) curve for H2 formation as a function of internuclear distance (x) of the H atoms is shown below.
The bond energy of H2 is:
1. | (b – a) | 2. | \(\dfrac{\left(\right. c - a \left.\right)}{2}\) |
3. | \(\dfrac{\left(\right. b - a \left.\right)}{2}\) | 4. | (c – a) |
How many (i) sp2 hybridised carbon atoms and (ii) bonds are present in the following compound?
1. | 7, 5 | 2. | 8, 6 |
3. | 7, 6 | 4. | 8, 5 |
During change of to ion, the electron adds on which one of the following orbitals?
1.
2.
3.
4.
Four diatomic species are listed below. Identify the correct order in which the bond order is increasing in them.
1. O2– < NO < C22– < He2+
2. C22– < He2+ < O2– < NO
3. He2+ < O2– < NO < C22–
4. NO < O2– < C22– < He2+
The pairs of species of oxygen and their magnetic behaviours are given below. Which of the following represents the correct description?
1. - Both paramagnetic
2. - Both diamagnetic
3. - Both paramagnetic
4. - Both paramagnetic
Some of the properties of the two species, are described below. Which one of them is correct?
1. | Isostructural with the same hybridization for the central atom. |
2. | Isostructural with different hybridization for the central atom. |
3. | Similar in hybridization for the central atom with different structures. |
4. | Dissimilar in hybridization for the central atom with different structures. |
In which of the following molecules the central atom does not have sp3 hybridization?
1. SF4
2.
3.
4. CH4
The most preferred structure among the following with the lowest energy for SO3 is:
1. | 2. | ||
3. | 4. |
Molecule | Shape or geometry of the molecule | |
a. | PCl5 | Trigonal |
b. | SF6 | Octahedral |
c. | BeCl2 | Linear |
d. | NH3 | Trigonal pyramidal |
1. | b | 2. | c |
3. | d | 4. | a |
Match the coordination number and type of hybridization with the distribution of hybrid orbitals in space based on Valence bond theory.
Coordination number and type of hybridisation | Distribution of hybrid orbitals in space | ||
(a) | 4, sp3 | (i) | Trigonal bipyramidal |
(b) | 4, dsp2 | (ii) | Octahedral |
(c) | 5, sp3d | (iii) | Tetrahedral |
(d) | 6, d2sp3 | (iv) | Square planar |
(a) | (b) | (c) | (d) | |
1. | (ii) | (iii) | (iv) | (i) |
2. | (iii) | (iv) | (i) | (ii) |
3. | (iv) | (i) | (ii) | (iii) |
4. | (iii) | (i) | (iv) | (ii) |