can anyone plzzz help me out in chemical bonding chapter i am facing a lots of problem in that chapter plzzz explain VSEPR theory and MOT
Answers
Valence shell electron pair repulsion (VSEPR) theory is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atom
it had been discovered to know about the bond angles between compounds
i)when there are 2 bond pairs in 3 covalent bonds then the the angle must be 180°.ex:BECL2
ii)when there are 3 bond pairs 3 covalent bonds then the bond angle must be 120°
ex:BF3
iii)when there are 4 bond pairs the bond angle is 109°28'.ex:CH4
iv)when there are 3 bond pairs 1 lone pair then the angle is 107°48'.ex:NH3
v)when there are 2 bond pairs and 2 lone pairs the bond angle is 104°30'.ex:H2O
Check the past results of a vehicle’s MOT tests, including:
if it passed or failed
the mileage recorded when it was tested
where each test was done
what parts failed at each test, and if any parts had minor problems
when its next MOT is due
You can only get results for tests done in England, Scotland or Wales since 2005.