Chemical Bonding and Molecular Structure · Question 64

Which of the two ions from the list given below that have the geometry that is explained by the same hybridization of orbitals, NO2-, NO3-, NH2-, NH4+, SCN-?

1. NO2- and NO3-
2. NH4+ and NO3-
3. SCN- and NH2-
4. NO2- and NH2-

The correct order of increasing bond length of C-H, C-O, C-C and C=C is

1. C-H < C=C < C-O < C-C
2. C-C < C=C < C-O < C-H
3. C-O < C-H < C-C < C=C
4. C-H < C-O < C-C < C=C

The pairs of species of oxygen and their magnetic behavior are noted below. Which of the following presents the correct description?

1. O2-, O22- - Both diamagnetic
2. O+, O22- - Both paramagnetic
3. O2+, O2 - Both paramagnetic
4. O, O22- - Both paramagnetic

Considering the state of hybridization of carbon atoms, find out the molecule among the following which is linear ?

1. CH3-CH=CH-CH3
2. CH3-C C-CH3
3. CH2=CH-CH2-C CH
4. CH3-CH2-CH2-CH3

Which of the following compounds has the lowest melting point?

1. CaCl2
2. CaBr2
3. CaI2
4. CaF2

In which of the following molecules the central atom does not have sp3 hybridization?

1. CH4
2. SF4
3. BF4-
4. NH4+

Some of the properties of the two species, NO3- and H3O+ are described below. Which one of them is correct?

1. Dissimilar in hybridization for the central atom with different structures.
2. Isostructural with same hybridization for the central atom.
3. Isostructural with different hybridization for the central atom.
4. Similar in hybridization for the central atom with different structures.

In which of the following pairs of molecules/ ions, the central atoms have sp2 hybridisation ?

1. NO2- and NH3
2. BF3 and NO2-
3. NH2- and H2O
4. BF3 and NH2-

Which one of the following species does not exist under normal conditions?

1. Be2+
2. Be2
3. B2
4. Li2

In which one of the following species the central atom has the type of hybridization which is not the same as that present in the other three ?

1. SF4
2. I3-
3. SbCl52-
4. PCl5