Chemical Bonds And Electronegativity: Fill & Download for Free

chemistry was easy to moderate. this is the feedback of some students .chemistry was almost from NCERT. Paper pattern was similar to january session. question were direct. question were from all the chapters.maths and physics was moderate .question from chemical bonding was : which property has different order with respect to others ?a) atomic radiusb) electronegativityc) ionisation enthalpyd) electrongain enthalpy .in maths majority of question were from class 11th .memory based chemistry questionQ.which of the following is use for preparation of colloids ?a. van arkelb. ostwaldc. mond processd. bredig arc method .

Oxygen and hydrogen don’t have full outer shells. If they did, they’d be helium and neon. They bond with each other because they don’t have full outer shells.Oxygen wants two more electrons. In fact, it wants them pretty bad. It wants them like that kid wants the BB gun in that one Christmas movie. It wants them like Scientology wants your money. If you’ve got a spare electron or two hanging around, oxygen will come by and help itself, slick as a Hollywood producer at an open bar.But fluorine…Oh man. Fluorine. Fluorine wants an electron like a meth addict wants a hit. Fluorine takes it to the next level.Oxygen will snag any electron that wanders by and isn’t nailed down. Fluorine will follow you down a dark alley, hit you over the head with a tire iron, and take the electron from your cold lifeless fingers.This is called “electronegativity,” and put crudely, without any scientific finesse, it’s a measure of how bad something wants electrons.Oxygen is pretty electronegative. Fluorine is the honey badger of the periodic table. Fluorine says “any electron not nailed down is mine; anything I can pry loose is not nailed down.”So you’ve got a water molecule. Two hydrogens sharing their electrons with an oxygen, everyone’s happy, right?Fluorine don’t care. Fluorine don’t give a shit.Fluorine is like “Nice chemical bonds you have there. Be a shame if something hap—oh, screw it, gimme that,” pistol-whips the oxygen, and runs off with one of the hydrogens.Or its electron, anyway. It doesn’t much care if the rest of the hydrogen follows along. Fluorine don’t care. Fluorine don’t give a shit. It’s totally fine running around in water as F- and leaving the poor naked proton to go find a water molecule somewhere else to snuggle up to in H3O+.A chemist will say the answer to this question is “fluorine is more electronegative than oxygen,” which is rather an impressive thing in its own right—not many things that exist in this universe get to make that claim.But that really undersells it. Fluorine is bad news. Fluorine is Samuel L. Jackson with a toothache on the day someone kicked his dog. Fluorine is a legion of Warhammer Orks in full-on WAAGH! mode. When fluorine walks down the road, Chuck Norris gets out of its way.Oxygen, which is used to being the most electronegative stuff in the room, is like “take my hydrogen, just don’t hurt me any more!”

A peptide bond is what is formed when an amine group reacts with a carboxylic acid group. It looks like this (marked in red on right side of arrow)It is a strong chemical bond and not easy to break.A hydrogen bond is a comparatively much weaker bond between a highly electronegative atom and hydrogen. It is most often shown by nitrogen, oxygen and fluorine, but can be shown by chlorine in some circumstances.It is not a proper ‘chemical’ bond as such, but is important nevertheless. Hydrogen bonding is responsible for phenomena like increased boiling points, high viscosity, high thermal stability, etc.