1 |
In sp2hybridization bond angle is _____ |
120°
180°
109.5°
None
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2 |
Which of the following statements is not correct regarding bonding molecular orbitals? |
Bonding molecular orbitals possess less energy than atomic orbitals from which they are formed
Bonding molecular orbitals have low electron density between the two nuclei
Every electron in the bonding molecular orbitals contributes to the attraction between atoms
Bonding molecular orbitals are formed when the electron waves undergo constructive interference
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3 |
The number of bonds in nitrogen molecule is |
|
4 |
|
The ionization energy of A is high and electron affinity of B is low
The ionization energy of A is low and electron affinity of B is high
Both the ionization energy of A and electron off affinity of B are high
Both the ionization energy of A and electron affinity of B are low
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5 |
Which for the following has no dipole moment |
HCI
H<sub>2</sub>S
H<sub>2</sub>O
CO<sub>2</sub>
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6 |
SnCI2have ______ shape |
Planner
Tetrahedral
Angular
None
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7 |
The bond angle depends upon the |
Types of bonds
Number of bonds
Non-bonding electron pairs
All of the above
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8 |
Molecular orbital picture of N2 indicates |
One unpaired electron
Two unpaired electron
No unpaired electron
None of these
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9 |
On the basis of VSEPR theory SO2is a |
Liner molecule
A bent molecule
A strong molecule
A gaseous molecule
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10 |
The bond angles in methane CH4are equal to |
109.5°
107.5°
104.5°
120°
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11 |
The shape of methanol, ammonia and water molecule can be explained by assuming |
Sp<sup>3 </sup>hybridization
Sp<sup>2</sup>hybridization
Sp hybridization
All of these
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12 |
Which of the following is a polar molecules |
Carbon dioxide
Carbon tetrachloride
Methanol
Ethane
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13 |
Which of the following has highest bond order |
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14 |
A bond between two atoms may be obtained by sharing of electrons such a bond is called |
An ionic bond
A coordinate bond
A dative bond
A covalent bond
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15 |
The electronegativity of elements in a period from left to right |
Decreases
Increases
First decreases then increases
First increases then decreases
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16 |
The electron affinity of chlorine may be represented by the equation |
|
17 |
|
154 pm
133 pm
120 pm
150 pm
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18 |
The equation for the first ionization energy of hydrogen is |
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19 |
Ionic radius, in a period from left to right |
Increases
Decreases
Decreases then increases
Increases and decreases
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20 |
The atomic radius of hydrogen is 37 |
Pecometer
Manometer
Angstrom
Micrometer
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21 |
When two hydrogen atoms approach to form a chemical bond |
The repulsive forces dominate the attractive forces
The attractive forces, dominate the repulsive forces
The energy of atoms increases
The two atoms start ionization
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22 |
Elements have the tendency to attain 8 electrons in their valence shell. This is known as |
Octer rule
Hunds rule
Pauli exclusion principle
Auf ban principle
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23 |
The driving force for making a bond is |
To attain noble gas electronic configuration
To make soled compounds
To make different compounds
To make gaseous substances
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24 |
Which of the following molecules has a net dipole moments |
CO<sub>2</sub>
CS<sub>2</sub>
SO<sub>2</sub>
CCI<sub>4</sub>
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25 |
Which of the following molecules has unpaired electrons in anti-bonding molecular orbitals? |
O<sub>2</sub>
N<sub>2</sub>
Br<sub>2</sub>
F<sub>2</sub>
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26 |
The force which holds the atoms together to form a compound is called |
A chemical bond
Van der waal's force
Dispersion force
London force
|