Exceptions to Octet Rule

IncompleteOctet

• Halides of Group 13
• BF3 AlCl3 BCl3
• Hydride of Group 13
• BeCl2 , ZnCl2 G,CH3)3

Expansion of octet

• Central Atom has more than 8e  PCl5-SF6

Pseudo Inert Gas Configuration

CATIONS WITH 18E IN OUTER MOST SHELL

• Ga+3
• Cu+
• Ag+
• Zn+2
• Sn+4
• Pb4+

Cations Having 9

Hello,

Vander Waals Force Characteristics

Non directional

Electrical Forces

Types

1. Keesom Force/Dipole Dipole Force : Cause Orientation effect
2. Debye Force /Dipole Induced dipole force :Forces resulting from the interaction of permanent dipoles
3. London Dispersion Force /Instantaneous dipole instantaneous induce dipole attraction(In atoms of noble gases/halogens).OCCURS due to vibration/moment of atom

Hello,

Aggregate marks is noting but the Average.

It is equal to

{ sum of marks secured in all applicable subjects divided by total number of subjects (or) total marks obtained divided by total allotted } * 100

Note: For some competitive exams, PCM aggregate is asked, in that case,

Hello aspirant Siddharth Teacher's training College is s situated in Jehanabad in bihar.affiliatefd to Magadh University. It offers one course across one stream namely Education and across 1 degrees like Bed . Hostel facility is not available for it's students. Sidhrth teacher training College admits students to it's ug program

Hey!

The entrance examination for AIISH consists of 50 objective type questions from Chemistry, Physics, Biology and Mathematics. You get 50 minutes to attempt the questions. AIISH entrance examination is a completely computer based online test.

Hope this answer helps!

Hi Tamoghna,

RNA is classified into the following parts:-

• message RNA (mRNA) - RNA carries genetic informationtranscribed form DNA.
• transfer ribonucleic acidt RNA(tRNA) - RNA is responsible to transport in protein synthesis.
• ribosomalRNA(rRNA) - The main part of ribosomeMicroRNAs
• Micro RNA (miRNAs) - A kind of non-coding RNA in eucaryonwith

hello soumya

TOPIC IN PHYSICS IMPOTANT FOR NEET:

1. SIMPLE HARMONIC MOTION
2. COLLISIONS
3. OPEN END PIPE AND CLOSE END PIPE
4. DOPPLER EFFECT AND BEATS
5. YOUNG’S DOUBLE SLIT EXPERIMENT (and also check single slit question may come or may not but read entire topic regarding it)
6. LAWS OF MOTION : BLOCK ON

Hello,

NATA will contain two parts of exam .Part A will be a drawing test of 135 minutes duration and part B consists of questions from Physics, Chemistry,Mathematics , General Aptitude and Logical Reasoning. Part B will have 15 questions from PCM and each questions carries 1.5 marks.This leads to