Question

why are molecules polar?

Answer 1

Bcoz there is difference in electronegativities of two bonding atoms ..
the shared pair of electrons is attracted more towards the more electronegative element ..So there is a partial negative charge on more electronegative element ...and partial positive charge on less electronegative element..
for example.. in case of H-Cl , Cl is more electronegative then H so electrone pair is attracted more towards Cl , Now Cl has a partial +ve charge and H has a partial -ve charge .. Due to these charges molecules are polar.
Hope itx Helpfull :)

Answer 2

Not all molecules are polar! :I
Isn't it?

Answer 3

You should have asked!
Why some molecules are polar!

Answer 4

Yupx all molecules aren't polar bcoz non-polar molecules don't have electronegativity difference..

Answer 5

First of all @hayhay5270 : A Warm Welcome to 'Open Study'. Please Read CoC (compulsory to read by all "Open Study" users) : http://openstudy.com/code-of-conduct