Of the following species, __________ will have bond angles of 120°.
[A) PH3
B) ClF3
C) NCl3
D) BCl3]
Answer: D
100
The combination of two atomic orbitals results in the formation of [0/1/2/3/4] molecular orbitals.
2
100
According to valence bond theory, which orbitals overlap in the formation of the bond in HBr? [1s-4p / 1s-4s /1s-3p/2s-4p/2s-3p]
1s-4p
100
Of the molecules below, only __________ is nonpolar.
[A) CO2
B) H2O
C) NH3
D) HCl
E) TeCl2]
Answer: A
100
A typical triple bond consists of one how many sigma and pi bonds?
1 sigma, 2 pi
200
In the valence shell of an atom there are six electron domains. They will be arranged in a (an) __________ geometry.
Answer: octahedral
200
The O-C-O bond angle in the CO32- ion is approximately __________.
[A) 90°
B) 109.5°
C) 120°
D) 180°
E) 60°]
Answer: C
200
The electron-domain geometry of __________ is tetrahedral except
[A) CBr4
B) PH3
C) CCl2Br2
D) XeF4]
D) XeF4
200
The molecular geometry of the BrO3- ion is __________.
[A) trigonal pyramidal
B) trigonal planar
C) bent
D) tetrahedral
E) T-shaped]
Answer: A
200
Of the molecules below, only __________ is polar.
[A) SbF5
B) AsH3
C) I2
D) SF6
E) CH4]
Answer: B
300
PCl5 has __________ electron domains and a __________ molecular arrangement.
[A) 6, trigonal bipyramidal
B) 6, tetrahedral
C) 5, square pyramidal
D) 5, trigonal bipyramidal
E) 6, seesaw]
Answer: D
300
What are the three bond angles in the trigonal bipyramidal structure?
Answer: 90°, 120°, 180°
300
Which of the molecules has a see-saw shape? (i) PCl3 (ii) CCl4 (iii) TeCl4 (iv) XeF4 (v) SF6
Answer: TeCl4
300
The molecular geometry of __________ is square planar.
[A) CCl4
B) XeF4
C) PH3
D) XeF2
E) ICl3]
Answer: B
300
For molecules of the general formula ABn, n can be greater than four only when __________.
A is an element from the third period or below the third period
400
What is the molecular geometry of a molecule that has three bonding and two non-bonding domains?
Answer: T-shaped
400
ClF3 has "T-shaped" geometry. There are [0/1/2/3/4] non-bonding domains in this molecule.
Answer: 2
400
There are __________ σ bonds and __________ π bonds in H3C–CH2–CH=CH–CH2–CXCH [X is triple bond].
[A) 14, 2
B) 10, 3
C) 12, 2
D) 13, 2
E) 16, 3]
Answer: E
400
The electron domain and molecular geometry of BrO2- is __________.
tetrahedral, bent
400
Each molecular orbital can accommodate, at most, two electrons with their spins paired. This is called the __________.
Answer: Pauli principle
500
Three monosulfur fluorides are observed: SF2, SF4, and SF6. Of these, __________ is/are polar.