Question
Download Solution PDFArrange the following molecules in the increasing order of their bond angles.
NH3 - (I), H2O - (II), BF3 - (III), BeCl2 - (IV)
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 4, i.e., II < I < III < IV.
- The increasing order of their bond angles is II < I < III < IV.
- The Valence Shell Electron Pair Repulsion (VSEPR) Theory provides the procedure to determine the shape of the covalent molecule.
- The electron pair that is involved in the bonding is termed as the bond pair, while the one not involved in bonding is termed as the lone pair of electron.
The below-mentioned table tells about the shape and bond angle of the compounds mentioned:
| Molecule | Total Electron Pairs (Bond Pair + Lone Pair) | Bond Angle | Shape |
| NH3 | 4 = 3 + 1 | 107.5° | Trigonal Pyramidal |
| H2O | 4 = 2 + 2 | 104.5° | Bent or V-shaped |
| BF3 | 3 = 3 + 0 | 120° | Trigonal Planar |
| BeCl2 | 2 = 2 + 0 | 180° | Linear |
- Below are mentioned the structures of the given molecules:
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