Geometry of molecule will be pyramidal if the outer post shell of the central atom has___________________?
Correct answer: A. 3 bond pair one lone pair
- A. 3 bond pair one lone pair
- B. 2 bond pair 2 lone pair
- C. 1 bond pair 3 lone pair
- D. 3 lone pair 1 bond pair
Explanation
A pyramidal molecular shape results when the central atom has three bonding pairs and one lone pair, as in NH3. The lone pair repels bonding pairs and makes the molecule non-planar, giving a trigonal pyramidal shape. The likely mistake is choosing d because it also lists three lone or bonding pairs, but one bond pair and three lone pairs gives a different arrangement.
Last updated
About VSEPR Theory
Valence shell electron pair repulsion theory predicts molecular shape by arranging bonding pairs and lone pairs around a central atom to minimize repulsion. Questions cover linear, trigonal planar, tetrahedral, trigonal bipyramidal and octahedral electron geometries, bond angles and distortions caused by lone pairs. Electron geometry is not always the same as molecular shape.
Practise Chemical Bonding
964 free Chemical Bonding MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A six-coordinate complex of formula CrCl3.6H2O has green color. A 0.1 M solution of the complex, when treated with an excess of AgNO3, gave 28.7 g of a white precipitate. The formula of the complex would be_.
According to VESPR Model the geometry of molecule having 5 bond pair in outer most shell will be __________________?
According to VSEPR theory, a molecule with four bond pairs and no lone pairs on the central atom is
According to VSEPR theory, the shape of a molecule is decided by
Choose the molecule that could not be represented by single electronic structure formula: