| 1 |
Those elements whose electronegativities are 1.2 and 3.2, react to form |
- A. Ionic bond
- B. Covalent bond
- C. Gaseous substance
- D. Definiting a liquid substance
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| 2 |
A molecular orbital can accommodate maximum electron |
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| 3 |
Which molecule has sG2 hybridization. |
- A. CH4
- B. C2H4
- C. C2H2
- D. C2H5
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| 4 |
Which of the following has bond angle of 120 <sup>o</sup> |
- A. BeCl2
- B. BF3
- C. CH4
- D. NH3
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| 5 |
The percentage of s characters in sp3 hybrid orbital is. |
- A. 25%
- B. 33.3%
- C. 50%
- D. 75%
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| 6 |
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
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| 7 |
BF3 has zero while NH3 has 1.49 D dipole moment because. |
- A. B is less electronegative than N
- B. F is more electronegative than N
- C. BF3 is pyramidal while NH3 is planar
- D. NH3 is pyramidal while BF3 is trigonal planar
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| 8 |
Which of the hydrogen halides has the highest percentage of ionic character. |
- A. HF
- B. HBr
- C. HCl
- D. HI
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| 9 |
VSEPR theory was proposed by |
- A. Nyholn and Gillespie
- B. Kossel
- C. Lewis
- D. Sidwick
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| 10 |
Which of the following molecules has zero dipole moment |
- A. NH<sub>3</sub>
- B. CHCI<sub>3</sub>
- C. H<sub>2</sub>O
- D. BF<sub>3</sub>
|