Uttrakhand chemistry lecturer class with important mcq

Описание: रसायन प्रवक्ता तैयारी व्हाट्सप्प ग्रुप
https://chat.whatsapp.com/G3PPjb4sRyP...

उत्तराखंड प्रवक्ता प्लेलिस्ट
   • उत्तराखंड प्रवक्ता भर्ती  

chemistry #jeemains #jee #neet #neet2024 #chemistrylectures #chemistrymcq #chemistryquestions #inorganicchemistry #physicalchemistry #organicchemistry #pravakta #chemistrylover #chemistryteacher #electrochemistry #thermodynamics #chemicalbonding #molecularstructure #gases #solutions #chemicalequilibrium #environmentalchemistry


This video, from "Let's DO Chemistry," is a chemistry lecture focusing on multiple-choice questions relevant to a "Pravakta" exam (0:00). The instructor also promotes a WhatsApp group for chemistry exam preparation (0:11-0:31).

The lecture covers several chemistry concepts through various questions:
Protonation Difficulty: The first question discusses which compound is most difficult to protonate, explaining that the involvement of lone pair electrons in resonance (specifically in phenol) makes it challenging for a proton to attack (0:33-3:49).
Molecular Shape and Hybridization: The video then moves on to identifying the shapes and hybridizations of different chemical species, using XeF4 as an example to illustrate its square planar shape due to lone pairs affecting the octahedral structure (3:52-5:35).
Species Stability: Another question addresses the stability of various species, explaining why SiCl6 2- does not exist due to the inability of six large chloride ions to be accommodated around the Si4+ ion (5:37-6:41).
Equilibrium Constant in Electrochemistry: The lecture explains how to calculate the equilibrium constant for a cell involving electron transfer using the Nernst equation (6:43-8:59).
Compressibility Factor (Z): The video discusses the compressibility factor (Z) of a gas, particularly when its molar volume is smaller than that of an ideal gas, indicating that attractive forces are dominant and Z is less than 1 (9:04-10:49).
Amphoteric Hydroxides: The instructor identifies Be(OH)2 as an amphoteric hydroxide, meaning it can react with both acids and bases (10:51-12:12).
Water Hardness Removal: The Clark method for removing temporary hardness of water, which involves reacting bicarbonates of calcium and magnesium with slaked lime, is explained (12:17-13:27).
Change in Entropy: The video illustrates how to determine when the change in entropy is negative, specifically in reactions where randomness or disorder decreases, such as the formation of a single molecule from two smaller ones (13:32-15:09).
Hydrogen Atom Transition Spectrum: The instructor discusses the different series in the hydrogen atom transition spectrum and which region (UV, visible, IR) they fall into, highlighting the Balmer series for the visible region (15:11-16:56).
Basicity of Methyl-Substituted Amines: The lecture explains the correct order of basic strength for methyl-substituted amines in aqueous solution, emphasizing that the order differs in gaseous state (17:00-18:48).
Electronic Configuration in Complexes: Finally, the video details how to determine the electronic configuration of the central atom in a coordination complex like K4Fe(CN)6, considering oxidation state, d-electron count, and crystal field splitting for strong ligands (18:50-21:00).
Ideal Solutions: The video concludes by defining ideal solutions and the conditions they must satisfy, such as zero change in volume and enthalpy upon mixing (21:04-23:21).
#chemistry
#jeemains
#jee
#neet
#neet2024
#chemistrylectures
#chemistrymcq
#chemistryquestions
#inorganicchemistry
#physicalchemistry
#organicchemistry
#pravakta
#chemistrylover
#chemistryteacher
#electrochemistry
#thermodynamics
#chemicalbonding
#molecularstructure
#gases
#solutions
#chemicalequilibrium
#environmentalchemistry
#letsdochemistry