| 1 |
Ionic radius, in a period from left to right
|
A. Increases
B. Decreases
C. Decreases then increases
D. Increases and decreases
|
| 2 |
If two lone pairs are present then bond angle of tetrahedral compound reduces to ______ degrees
|
A. 109.5°
B. 107.5°
C. 104.5°
D. None
|
| 3 |
The degree of polarity of molecule is known as its
|
A. Dipole moment
B. Moment arm
C. Bond energy
D. Ionic character
|
| 4 |
Water H2O is liquid while hydrogen sulphide H2S is a gas beause
|
A. Water has higher molecular weight
B. Hydrogen sulphide is a weak acid
C. Sulphure has high electronegativity than oxyhe
D. Water molecules associate through hydrogen bonding
|
| 5 |
Which of the following species has unpaired electrons in antibonding molecular orbitals
|
A.
B.
C.
D.
|
| 6 |
According to VSEPR theory, the shape of the water molecule is
|
A. Octahedral
B. Distorted tetrahedral
C. Planar triangle
D. Linear
|
| 7 |
One of the following bonds is polar but compound is non-polar
|
A. H2O
B. NH3
C. HCl
D. CO2
|
| 8 |
Which of the following statements is not correct regarding bonding molecular orbitals?
|
A. Bonding molecular orbitals possess less energy than atomic orbitals from which they are formed
B. Bonding molecular orbitals have low electron density between the two nuclei
C. Every electron in the bonding molecular orbitals contributes to the attraction between atoms
D. Bonding molecular orbitals are formed when the electron waves undergo constructive interference
|
| 9 |
Elements have the tendency to attain 8 electrons in their valence shell. This is known as
|
A. Octer rule
B. Hunds rule
C. Pauli exclusion principle
D. Auf ban principle
|
| 10 |
Generally the bond formed by metals with non-metals is
|
A. Ionic
B. Covalent
C. Polar
D. Non- polar
|
| 11 |
Ionization energies increase from left to right along the period due to
|
A. Increase in nuclear charge
B. Repulsion of electron increases
C. Repulsion of protons increase
D. Atomic size increase along the period
|
| 12 |
Which of the following has highest bond order
|
A.
B.
C.
D.
|
| 13 |
A bond between two atoms may be obtained by sharing of electrons such a bond is called
|
A. An ionic bond
B. A coordinate bond
C. A dative bond
D. A covalent bond
|
| 14 |
Which of the following is a polar molecules
|
A. Carbon dioxide
B. Carbon tetrachloride
C. Methanol
D. Ethane
|
| 15 |
An ionic compound M2S3is formed by the metal M,, the metal is
|
A. Ca
B. Ba
C. K
D. Al
|
| 16 |
B-atom in BF3has
|
A. sp3hybridization
B. sp2hybridization
C. sp hybridization
D. no hybridization
|
| 17 |
The three N - Hσ-bonds are made by
|
A. sp3- s overlap
B. sp2- s overlap
C. P - p overlap
D. sp - overlap
|
| 18 |
Which of the following molecules has unpaired electrons in anti-bonding molecular orbitals?
|
A. O2
B. N2
C. Br2
D. F2
|
| 19 |
Which one of these is weakest?
|
A. Ionest bond
B. Covalent bond
C. Metallic bond
D. Van der Waal's forces
|
| 20 |
In sp2hybridization bond angle is _____
|
A. 120°
B. 180°
C. 109.5°
D. None
|
| 21 |
The geometry of 4 sp3hybrid orbitals on an atom is
|
A. Square planar
B. Tetrahedral
C. Trigonal planar
D. Linear
|
| 22 |
Mg becomes isoelectronic with neon when it
|
A. Loses two electrons
B. Gains two electrons
C. Loses 1 electron
D. Gains 1 electron
|
| 23 |
When elements of group I react with the elements of group VIA theory form
|
A. Ionic bond
B. Covalent bond
C. Polar bond
D. None
|
| 24 |
The bond order O2molecule is
|
A. 1
B. 2
C. 3
D. Zero
|
| 25 |
Which of the following geometry is associated with the compound in which the central atom assumes sp3d hybridization?
|
A. Planar
B. Pyramidal
C. Angular
D. Trigonal bipyramidal
|
| 26 |
Antibonding MO is formed by
|
A. Addition of atomic orbitals
B. Substraction of atomic orbitals
C. Multiplication of atomic orbitals
D. None of these
|
| 27 |
The nature of interparticle forces in benzene is
|
A. Dipole-dipole interaction
B. Dispersion force
C. Ion-dipole interaction
D. H-bonding
|
| 28 |
|
A. 154 pm
B. 133 pm
C. 120 pm
D. 150 pm
|
| 29 |
SnCI2have ______ shape
|
A. Planner
B. Tetrahedral
C. Angular
D. None
|
| 30 |
Generally ionization energy of atoms decreases by
|
A. Decreases in atomic size
B. Increase in atomic size
C. Increase in nuclear charge
D. None of these
|