Chemical Bonding and Molecular Structure

The species, having bond angles of 120 is

1. ClF3
2. NCl3
3. BCl3
4. PH3

Which one of the following pairs of species have the same bond order ?

1. O2, NO+
2. CN-, CO
3. N2, O2-
4. CO, NO

Consider the molecules CH4, NH3 and H2O. Which of the given statements is false?

1. The H-O-H bond angle in H2O is smaller than the H-N-H bond angle in NH3.
2. The H-C-H bond angle in CH4 is larger than the H-N-H bond angle in NH3.
3. The H-C-H bond angle in CH4, the H-N-H bond angle in NH3, and the H-O-H bond angle in H2O are all greater than 90 .
4. The H-O-H bond angle in H2O is larger than the H-C-H bond angle in CH4.

Predict the correct order among the following :

1. bond pair - bond pair > lone pair - bond pair > lone pair - lone pair
2. lone pair - bond pair > bond pair - bond pair > lone pair - lone pair
3. lone pair - lone pair > lone pair - bond pair > bond pair - bond pair
4. lone pair - lone pair > bond pair - bond pair > lone pair - bond pair

Which one of the following compounds shows the presence of intramolecular hydrogen bond?

1. H2O2
2. HCN
3. Cellulose
4. Concentrated acetic acid

The hybridizations of atomic orbitals of nitrogen in NO2+, NO3- and NH4+ respectively are

1. sp, sp3 and sp2
2. sp2, sp3 and sp
3. sp, sp2 and sp3
4. sp2, sp and sp3

Which of the following pairs of ions is isoelectronic and isostructural?

1. CO32-, NO3-
2. ClO3-, CO32-
3. SO32-, NO3-
4. ClO3-, SO32-

The correct geometry and hybridization for XeF4 are

1. octahedral, sp3d2
2. trigonal bipyramidal, sp3d
3. planar triangle, sp3d3
4. square planar, sp3d2

Among the following, which one is a wrong statement ?

1. PH5 and BiCl5 do not exist.
2. p -d bonds are present in SO2.
3. SeF4 and CH4 have same shape.
4. I3+ has bent geometry.

In which of the following pairs, both the species are not isostructural ?

1. Diamond, Silicon carbide
2. NH3, PH3
3. XeF4, XeO4
4. SiCl4, PCl4+

Decreasing order of stability of O2, O2-, O2+ and O22- is

1. O22- > O2- > O2 > O2+
2. O2 > O2+ > O22- > O2-
3. O2- > O22- > O2+ > O2
4. O2+ > O2 > O2- > O22-

Which of the following pairs of ions are isoelectronic and isostructural ?

1. SO32-, NO3-
2. ClO3-, SO32-
3. CO32-, SO32-
4. ClO3-, CO32-

The correct bond order in the following species is

1. O2+ < O2- < O22+
2. O2- < O2+ < O22+
3. O22+ < O2+ < O2-
4. O22+ < O2- < O2+

Which of the following options represents the correct bond order ?

1. O2- > O2 < O2+
2. O2- < O2 > O2+
3. O2- > O2 > O2+
4. O2- < O2 < O2+

Maximum bond angle at nitrogen is present in which of the following ?

1. NO2+
2. NO3-
3. NO2
4. NO2-

Which of the following species contains equal number of σ- and π-bonds ?

1. (CN)2
2. CH2(CN)2
3. HCO3-
4. XeO4

Which of the following molecules has the maximum dipole moment?

1. CO2
2. CH4
3. NH3
4. NF3

Which one of the following species has plane triangular shape?

1. N3-
2. NO3-
3. NO2-
4. CO2

XeF2 is isostructural with

1. SbCl3
2. BaCl2
3. TeF2
4. ICl2-

Which of the following is a polar molecule?

1. SiF4
2. XeF4
3. BF3
4. SF4

Which of the following is paramagnetic?

1. CN-
2. NO+
3. CO
4. O2-

Which one of the following molecules contains no bond?

1. SO2
2. NO2
3. CO2
4. H2O

The pair of species that has the same bond order in the following is

1. CO, NO+
2. NO-, CN-
3. O2, N2
4. O2, B2

In which of the following pair both the species have sp3 hybridization ?

1. SiF4, BeH2
2. NF3, H2O
3. NF3, BF3
4. H2S, BF3

In which of the following ionization processes the bond energy increases and the magnetic behaviour changes from paramagnetic to diamagnetic.

1. O2 O2+
2. C2 C2+
3. NO NO+
4. N2 N2+

During change of O2 to O2- ion, the electron adds on which one of the following orbitals ?

1. * orbital
2. orbital
3. * orbital
4. orbital

Four diatomic species are listed below. Identify the correct order in which the bond order is increasing in them

1. NO < O2- < C22- < He2+
2. O2- < NO < C22- < He2+
3. C22- < He2+ < O2- < NO
4. He2+ < O2- < NO < C22-

Which one of the following pairs is isostructural (i.e., having the same shape and hybridization) ?

1. [BCl3 and BrCl3]
2. [NH3 and NO3-]
3. [NF3 and BF3]
4. [BF4- and NH4+]

Bond order of 1.5 is shown by

1. O2+
2. O2-
3. O22-
4. O2

Which of the following species contains three bond pairs and one lone pair around the central atom ?

1. H2O
2. BF3
3. NH2-
4. PCl3