Chemical Bonding - Live Session - 24 July 2020Contact Number: 9667591930 / 8527521718

Page:

1.

In bisulphate ion, HSO_{4}^{-}, the formal charge on S atom is

1. +6

2. +4

3. +1

4. +2

2.

Among the following isostructural compounds, which one has highest lattice energy ?

1. LiCl

2. MgO

3. NaCl

4. LiF

3.

A $\sigma $ bonded molecule MX_{3} is T-shaped. The number of non-bonding pairs of electrons is:

1. 0

2. 2

3. 1

4. Can be predicted only if atomic number of M is known

4.

The hybrid state of S in SO_{3} is similar to that of

1. C in C_{2}H_{2}

2. C in C_{2}H_{4}

3. C in CH_{4}

4. C in CO

5.

In a chemical change from PCl_{3} $\to $ PCl_{5} the hybrid state of P changes from :

1. sp^{2} to sp^{3 }

2. sp^{3} to sp^{2}

3. sp^{3} to sp^{3}d

4. sp^{3} to dsp

6.

The shape of covalent molecule AX_{3} is

1. Triangular

2. T-shape

3. Pyramidal

4. Any of the above three depending upon the number of lone pairs present in A

7.

The geometrical arrangement and shape of ${I}_{3}^{-}$ are respectively

1. Trigonal bipyramidal geometry, linear shape

2. Hexagonal structure, linear shape

3. Triangular planar geometry, triangular shape

4. Tetrahedral geometry, pyramidal shape

8.

Which has non-zero dipole moment?

1. PCl_{5}

2. PCl_{3}F_{2}

3. PCl_{3}Br_{2}

4. PCl_{3}(CH_{3})_{2}

9.

Which is the incorrect about bond angles?

1. NH_{3} > NF_{3}

2. NF_{3}> PF_{3}

3. NH_{3}> PH_{3}

4. NH_{3}> H_{2}O

10.

Which molecules/ions are most paramagnetic?

1. B_{2}

2. C_{2}

3. ${O}_{2}^{+}$

4. ${O}_{2}^{-}$

11.

The most volatile halogen acid is

1. HF

2. HCl

3. HBr

4. HI

12.

The correct statement is

1. When O_{2} is converted into ${O}_{2}^{+}$ then bond distance increases

2. When N_{2} is converted into ${N}_{2}^{+}$ then bond distance increases

3. When CO is converted into CO^{+} then bond distance increases

4. All of these

13.

Which has highest bond energy?

1. CO

2. CO^{+}

3. N_{2}

4. ${N}_{2}^{+}$

14.

In which case observed dipole moment is greater than theoretical dipole moment?

1.

2.

3.

4.

15.

Benzene ring contains

1. 12 $\sigma $ and 3$\pi $

2. 6 $\sigma $ and 3$\pi $

3. 9 $\sigma $ and 3$\pi $

4. 8 $\sigma $ and 2$\pi $

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