MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Choose the incorrect option from the following. |
| A. | Valence bond theory does not explain the paramagnetic nature of O2 |
| B. | Molecular orbital theory explains the extra stability of O2+ cation over O2 |
| C. | Valence bond theory explains the ionization or gain of electrons, giving O2+ and O2– ions, if O2 has the stable octet |
| D. | Resonance has no role in Molecular orbital theory |
| Answer» D. Resonance has no role in Molecular orbital theory | |
| 2. |
The combination of H (1s1) and F (2px1) gives _________ |
| A. | Bonding orbital |
| B. | Antibonding orbital |
| C. | Both bonding and antibonding orbital |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 3. |
Calculate the number of σ and π bonds in cyclohexadiene. (C6H8) |
| A. | σ bond = 2, π bond = 14 |
| B. | σ bond = 14, π bond = 2 |
| C. | σ bond = 12, π bond = 2 |
| D. | σ bond = 12, π bond = 4 |
| Answer» C. σ bond = 12, π bond = 2 | |
| 4. |
Bond order of NO+ molecule is _________ |
| A. | 2 |
| B. | 3 |
| C. | 2.5 |
| D. | 4 |
| Answer» C. 2.5 | |