| 1 |
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A. Excitantion of an electron from 2s to 2p-orbital
B. Transfer of three electrons from B to the other atoms
C. Excitation of two electrons form 2s orbital to 2p orbital
D. Formation of molecular ion
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| 2 |
The electronegativeities of F,Cl,Br and I are 4.0,3.0,2.8,2.5 respectively.Hydrogen halide with a high percentage of ionic character is
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A. HF
B. HCL
C. HBr
D. HI
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| 3 |
In which of the following theories the hybridizationis considered
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A. Vsepr
B. Lewis
C. Molecule orbital
D. Valence bond
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| 4 |
The nature of interparticle forces in benzene is
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A. Dipole-dipole interaction
B. Dispersion force
C. Ion-dipole interaction
D. H-bonding
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| 5 |
In a group the atomic size increase downward due to
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A. Addition of electronic shells
B. Increase in the proton number
C. Repulsion of electrons
D. All of the above
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| 6 |
The covalent bonds are
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A. Unidirectional
B. Bi-directional
C. Non-directional
D. Multi-directional
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| 7 |
Which is made by coordinate covalent bond
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A. H3O+
B. H2O
C. CH4
D. HCl
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| 8 |
The tendency of an atom to attract shared electron pair towards itself is called
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A. Covelent bond
B. Electronegativity
C. Ionization potential
D. Electronic affinity
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| 9 |
The equation for the first ionization energy of hydrogen is
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A.
B.
C.
D.
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| 10 |
Noble gases have the electronic configuration with their valance shell ns2np6except one
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A. He
B. Ne
C. Kr
D. Xe
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| 11 |
According to VSEPR theory, the shape of the water molecule is
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A. Octahedral
B. Distorted tetrahedral
C. Planar triangle
D. Linear
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| 12 |
Coordinate covalent bond is present in the molecules
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A. H2O
B. BF3
C. SiO2
D. SO2
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| 13 |
The shape of methanol, ammonia and water molecule can be explained by assuming
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A. Sp3 hybridization
B. Sp2hybridization
C. Sp hybridization
D. All of these
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| 14 |
The electronegativity of elements in a period from left to right
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A. Decreases
B. Increases
C. First decreases then increases
D. First increases then decreases
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| 15 |
The overlapping of two partially filled atomic orbital is in such a way that the probability of finding the electron pair is maximum along the axis joining the two nuclei, the bond is
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A. Sigma bond
B. Pi bond
C. Ionic bond
D. Non-polar bond
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| 16 |
The electron affinity of chlorine may be represented by the equation
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A.
B.
C.
D.
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| 17 |
Ca, Mg, Be, Ba, belong to the same group, the order of their ionization energy values is
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A. Be > Mg> Ca > Ba
B. Ba > Ca > Mg > Be
C. Ca > Mg > Be > Ba
D. Ba > Mg > Ca > Be
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| 18 |
Which of the following has polar bond
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A. O2
B. N2
C. HCl
D. Cl2
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| 19 |
XeF4has shape of
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A. Sphere
B. Trigonal bipyramidal
C. Tetrahedral
D. Square planar
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| 20 |
Number of sigma bonds in P4O10is
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A. 6
B. 7
C. 17
D. 16
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| 21 |
The driving force for making a bond is
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A. To attain noble gas electronic configuration
B. To make soled compounds
C. To make different compounds
D. To make gaseous substances
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| 22 |
A bond between two atoms may be obtained by sharing of electrons such a bond is called
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A. An ionic bond
B. A coordinate bond
C. A dative bond
D. A covalent bond
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| 23 |
The boiling point of heavy water is
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A. 108°C
B. 101.4°C
C. 99°C
D. 110°C
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| 24 |
Fluorine molecule is formed by
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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
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| 25 |
The number of bonds in nitrogen molecule is
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A.
B.
C.
D.
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| 26 |
On the basis of VSEPR theory SO2is a
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A. Liner molecule
B. A bent molecule
C. A strong molecule
D. A gaseous molecule
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| 27 |
Which of the following has zero depole-moment?
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A. CIF
B. PCl3
C. SiF4
D. CFCl4
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| 28 |
Which of the following has unchanged valency?
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A. H
B. Na
C. Fe
D. Oxygen
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| 29 |
Ionic radius, in a period from left to right
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A. Increases
B. Decreases
C. Decreases then increases
D. Increases and decreases
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| 30 |
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?
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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+
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