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.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More VSEPR Theory questions
According to VESPR Model the geometry of molecule having 5 bond pair in outer most shell will be __________________?
The number of lone pairs in XeOF4 is_________?
I3( Tri-iodine) has shape_________?
The geometry of ammonia is___________________?
The Lewis acids are__________________?
The octet rule does not always hold for which of the following elements _________________?