| 1 |
SnCI2have ______ shape
|
A. Planner
B. Tetrahedral
C. Angular
D. None
|
| 2 |
Mg becomes isoelectronic with neon when it
|
A. Loses two electrons
B. Gains two electrons
C. Loses 1 electron
D. Gains 1 electron
|
| 3 |
Ca, Mg, Be, Ba, belong to the same group, the order of their ionization energy values is
|
A. Be > Mg> Ca > Ba
B. Ba > Ca > Mg > Be
C. Ca > Mg > Be > Ba
D. Ba > Mg > Ca > Be
|
| 4 |
Size of an anion is increased as compared to its atom because of the
|
A. Addition of new shell
B. Repulsion of electrons in the valence shell
C. Decrease in nuclear charge
D. Increase in the unclear charge
|
| 5 |
The covalent bonds are
|
A. Unidirectional
B. Bi-directional
C. Non-directional
D. Multi-directional
|
| 6 |
The formation of compounds like PF5, BCI3, SF6indicates that
|
A. These halides are ionic
B. These halides are covalent
C. They are Lewis acids
D. Octet rule not obeyed so the rule is not universal
|
| 7 |
Inter molecular forces in solid hydrogen are
|
A. Covalent forces
B. Van der Waal forces or London dispersion forces
C. Hydrogen bonds
D. All of these
|
| 8 |
The shape of the molecule SF2Cl2is
|
A. Trigonal bipyradmidal
B. Cubic
C. Octahedral
D. Tetrahedral
|
| 9 |
Coordinate covalent bond is present in the molecules
|
A. H2O
B. BF3
C. SiO2
D. SO2
|
| 10 |
Atoms obey octet rule by sharing-electrons making covalent bonds according to
|
A. Lewis and Kossal theory
B. Valance bond theory
C. VSEPR theory
D. Molecular orbital theory
|
| 11 |
Fluorine molecule is formed by
|
A. The axial p-p overlap
B. The sidewise p-p overlap
C. The axial s-p overlap
D. The overlap of two sp2hybrid orbitals
|
| 12 |
Electronegativity values of the elements F, CI and Br vary
|
A. F > CI > Br
B. Br > CI > F
C. Cl > Br > F
D. CI > F > Br
|
| 13 |
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
|
| 14 |
The force which holds the atoms together to form a compound is called
|
A. A chemical bond
B. Van der waal's force
C. Dispersion force
D. London force
|
| 15 |
When of the following is isolelectronic with krypton
|
A. Ca++
B. Al+++
C. Br-1
D. I-1
|
| 16 |
When two hydrogen atoms approach to form a chemical bond
|
A. The repulsive forces dominate the attractive forces
B. The attractive forces, dominate the repulsive forces
C. The energy of atoms increases
D. The two atoms start ionization
|
| 17 |
The driving force for making a bond is
|
A. To attain noble gas electronic configuration
B. To make soled compounds
C. To make different compounds
D. To make gaseous substances
|
| 18 |
Generally the bond formed by metals with non-metals is
|
A. Ionic
B. Covalent
C. Polar
D. Non- polar
|
| 19 |
In which of the following theories the hybridizationis considered
|
A. Vsepr
B. Lewis
C. Molecule orbital
D. Valence bond
|
| 20 |
H-bonding is not present in
|
A. Glycerine
B. Water
C. Hydrogen sulphide
D. Hydrogen fluride
|
| 21 |
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
|
| 22 |
Which carbon is more electronegative?
|
A. sp3- hybridized carbon
B. sp-hybridized carbon
C. sp2-hybridized carbon
D. always same irrespective of its hybrid state
|
| 23 |
Which is made by coordinate covalent bond
|
A. H3O+
B. H2O
C. CH4
D. HCl
|
| 24 |
The structure of ICI2is
|
A. Trigonal
B. Trigonal bipyramidal
C. Octahedral
D. Square planar
|
| 25 |
The bond order in No is 2.5 while that in NO+is 3.Which of the following statements is true for these two species?
|
A. Bond length in NO+is greater than in NO
B. Bond length in unpredictable
C. Bond length in NO+is equal to that in NO
D. Bond length in NO is greater than in NO+
|
| 26 |
The electron affinity of chlorine may be represented by the equation
|
A.
B.
C.
D.
|
| 27 |
Which of the following is a polar molecules
|
A. Carbon dioxide
B. Carbon tetrachloride
C. Methanol
D. Ethane
|
| 28 |
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
|
| 29 |
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
|
| 30 |
In H2O molecule the bond angle is
|
A. 90°
B. 109.5°
C. 107°
D. 104.5°
|