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NEET AIIMS 2021-22
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NEET AIIMS 2021-22 (English)
Are you aspiring to crack the NEET AIIMS 2021-22 exams? Look no further because the 'NEET AIIMS 2021-22' Telegram channel, with the username @medical_entrance, is here to provide you with all the resources you need to succeed. This channel is dedicated to NEET AIIMS aspirants like you, offering a treasure trove of EBooks, previous year question papers, solutions, notes, and announcements. Whether you need tips and tricks for chemistry, physics, or math, this channel has got you covered with separate channels for each subject - @neet_iit_Chemistry, @neet_iit_Physics, and @iit_Math. Additionally, you can find important resources by sending a message to @sdnyanesh. Don't miss out on this opportunity to enhance your preparation and boost your chances of acing the NEET AIIMS exams. Join the 'NEET AIIMS 2021-22' Telegram channel today and take a step closer to your dream of becoming a successful medical professional!
NEET AIIMS 2021-22
29 Jul, 09:43
💠Properties of Solids and Liquids - Revision Notes on Liquids at Rest:💠
⛔️Force of cohesion:- It is force between two molecules of similar nature.
⛔️Force of adhesion:- It is the force between two molecules of different nature.
⛔️Molecular range:- The maximum distance between two molecules so that the force of attraction between them remains effective is called molecular range.
⛔️Sphere of influence:- Sphere of influence of any molecule is the sphere with molecule as its center and having a radius equal to molecular range (=10-7 cm).
⛔️Surface film:- Surface film of a liquid is defined as the portion of liquid lying on the surface and caught between two parallel planes situated molecular range apart.
⛔️Surface Tension
Surface tension is the property of a liquid by virtue of which its free surface behaves like a stretched membrane and supports, comparatively heavier objects placed over it. It is measured in terms of force of surface tension.
⛔️Force of surface tension:- It is defined as the amount of force acting per unit length on either side of an imaginary line drawn over the liquid surface.
(a) T = Force/length = F/l
(b) T = Surface energy/Surface area = W/A
Units:- S.I – Nm-1
C.G.S- dyn cm-1
⛔️Additional force:-
(a) For a cylindrical rod:- F = T×2πr (Here r is the radius of cylindrical rod)
(b) For a rectangular block:- F = T×2(l+d) (Here l is the length and d is the thickness of the rectangular block)
(c) For a ring:- F = T×2×2πr (Here r is the radius of cylindrical rod)
⛔️Surface energy:-
Potential energy per unit area of the surface is called surface energy.
(a) Expansion under isothermal condition:-
To do work against forces of surface tension:-
W= T×A (Here A is the total increase in surface area)
To supply energy for maintaining the temperature of the film:-
E = T+H
(b) Expansion under adiabatic conditions:-
E = T
Force of surface tension is numerically equal to the surface energy under adiabatic conditions.
⛔️Drops and Bubbles:-
(a) Drop:- Area of surface film of a spherical drop of radius R is given by, A = 4πR2
(b) Bubble:- The surface area of the surface films of a bubble of radius R is, A = 2×4πR2
⛔️Combination of n drops into one big drop:-
(a) R = n1/3r
(b) Ei = n (4πr2T), Ef =4πR2T
(c) Ef/ Ei = n -1/3
(d) ΔE/Ei = [1-(1/n1/3)]
(e) ΔE = 4πR2T (n1/3-1) = 4πR3T (1/r – 1/R)
⛔️Angle of contact:- Angle of contact, for a pair of solid and liquid, is defined as the angle between tangent to the liquid surface drawn at the point of contact and the solid surface inside the liquid.
(a) When θ < 90º (acute):-
Fa >Fc/√2
(i) Force of cohesion between two molecules of liquid is less than the force of adhesion between molecules of solid and liquid.
(ii) Liquid molecules will stick with the solid, thus making solid wet.
(iii) Such liquid is put in the solid tube; it will have meniscus concave upwards.
(b) When θ > 90º (obtuse):-Fa<Fc/√2
(i) Force of cohesion between two molecules of liquid is less than the force of adhesion between molecules of solid and liquid.
(ii) In this case, liquids do not wet the solids.
(iii) Such liquids when put in the solid tube will have a meniscus convex upwards.
(c) When θ = 90º:-?
Fa=Fc/√2
The surface of liquid at the point of contact is plane. In this case force of cohesion and adhesion are comparable to each other.
(d) cosθc = Tsa – Tsl/Tla
Here, Tsa,Tsl and Tla represent solid-air, solid-liquid and liquid-air surface tension respectively). Here θc is acute if Tsl < Tsa while θc is obtuse if Tsl >Tsa.
⛔️Capillarity:-
?Rise of Liquid in a Capillary Tube?Capillarity is the phenomenon, by virtue of which the level of liquid in a capillary tube is different from that outside it, is called capillarity.
Weight of liquid, W = Vρg = πr2[h+(r/3)]ρg (Here r is the radius meniscus)
If weight of meniscus is taken into account, the force of surface tension will be,
T = [r(h+(r/3)) ρg]/2 cosθ
For fine capillary, force of surface tension, T = rhρg/2 cosθ
So height, h = 2T cosθ/ rρg
⛔️Force of cohesion:- It is force between two molecules of similar nature.
⛔️Force of adhesion:- It is the force between two molecules of different nature.
⛔️Molecular range:- The maximum distance between two molecules so that the force of attraction between them remains effective is called molecular range.
⛔️Sphere of influence:- Sphere of influence of any molecule is the sphere with molecule as its center and having a radius equal to molecular range (=10-7 cm).
⛔️Surface film:- Surface film of a liquid is defined as the portion of liquid lying on the surface and caught between two parallel planes situated molecular range apart.
⛔️Surface Tension
Surface tension is the property of a liquid by virtue of which its free surface behaves like a stretched membrane and supports, comparatively heavier objects placed over it. It is measured in terms of force of surface tension.
⛔️Force of surface tension:- It is defined as the amount of force acting per unit length on either side of an imaginary line drawn over the liquid surface.
(a) T = Force/length = F/l
(b) T = Surface energy/Surface area = W/A
Units:- S.I – Nm-1
C.G.S- dyn cm-1
⛔️Additional force:-
(a) For a cylindrical rod:- F = T×2πr (Here r is the radius of cylindrical rod)
(b) For a rectangular block:- F = T×2(l+d) (Here l is the length and d is the thickness of the rectangular block)
(c) For a ring:- F = T×2×2πr (Here r is the radius of cylindrical rod)
⛔️Surface energy:-
Potential energy per unit area of the surface is called surface energy.
(a) Expansion under isothermal condition:-
To do work against forces of surface tension:-
W= T×A (Here A is the total increase in surface area)
To supply energy for maintaining the temperature of the film:-
E = T+H
(b) Expansion under adiabatic conditions:-
E = T
Force of surface tension is numerically equal to the surface energy under adiabatic conditions.
⛔️Drops and Bubbles:-
(a) Drop:- Area of surface film of a spherical drop of radius R is given by, A = 4πR2
(b) Bubble:- The surface area of the surface films of a bubble of radius R is, A = 2×4πR2
⛔️Combination of n drops into one big drop:-
(a) R = n1/3r
(b) Ei = n (4πr2T), Ef =4πR2T
(c) Ef/ Ei = n -1/3
(d) ΔE/Ei = [1-(1/n1/3)]
(e) ΔE = 4πR2T (n1/3-1) = 4πR3T (1/r – 1/R)
⛔️Angle of contact:- Angle of contact, for a pair of solid and liquid, is defined as the angle between tangent to the liquid surface drawn at the point of contact and the solid surface inside the liquid.
(a) When θ < 90º (acute):-
Fa >Fc/√2
(i) Force of cohesion between two molecules of liquid is less than the force of adhesion between molecules of solid and liquid.
(ii) Liquid molecules will stick with the solid, thus making solid wet.
(iii) Such liquid is put in the solid tube; it will have meniscus concave upwards.
(b) When θ > 90º (obtuse):-Fa<Fc/√2
(i) Force of cohesion between two molecules of liquid is less than the force of adhesion between molecules of solid and liquid.
(ii) In this case, liquids do not wet the solids.
(iii) Such liquids when put in the solid tube will have a meniscus convex upwards.
(c) When θ = 90º:-?
Fa=Fc/√2
The surface of liquid at the point of contact is plane. In this case force of cohesion and adhesion are comparable to each other.
(d) cosθc = Tsa – Tsl/Tla
Here, Tsa,Tsl and Tla represent solid-air, solid-liquid and liquid-air surface tension respectively). Here θc is acute if Tsl < Tsa while θc is obtuse if Tsl >Tsa.
⛔️Capillarity:-
?Rise of Liquid in a Capillary Tube?Capillarity is the phenomenon, by virtue of which the level of liquid in a capillary tube is different from that outside it, is called capillarity.
Weight of liquid, W = Vρg = πr2[h+(r/3)]ρg (Here r is the radius meniscus)
If weight of meniscus is taken into account, the force of surface tension will be,
T = [r(h+(r/3)) ρg]/2 cosθ
For fine capillary, force of surface tension, T = rhρg/2 cosθ
So height, h = 2T cosθ/ rρg
NEET AIIMS 2021-22
18 Jul, 03:07
NEET AIIMS 2021-22
27 May, 04:42
🧩Revision Notes on Inheritance and Variation🧩
➖➖➖➖➖➖➖➖➖➖➖➖
♦️Mendel’s Law of Inheritance♦️
(1) Mendelism means experiments performed by Mendel on genetics.
(2) Mendel’s experiment involved 4 steps as selection, hybridization, selfing and calculations. His results led to the formation of laws of genetics later.
(3) Mendel performed monohybrid and dihybrid crosses and gave three principles of inheritance.
(4) Mendel’s three principles of inheritance are:
(i) Law of dominance
(ii) Law of segregation or law of purity of gametes
(iii) Law of independent assortment
(5) Law of Dominance: The dominant characters are expressed when factors are in heterozygous condition.
(6) The recessive characters are only expressed in homozygous conditions. The characters never blend in heterozygous condition. A recessive character that was not expressed in heterozygous condition may be expressed again when it becomes homozygous.
(7) Law/Principle of segregation states that when a pair of contrasting factor or gene is brought together in a hybrid, these factors do not blend or mix up but simply associate themselves and remain together and separate at the time of gamete formation.
(8) Principle of independent assortment states that genes of different characters located in different pairs of chromosomes are independent of one another in this segregation during gamete formation.
(9) Test Cross: A cross between F1 hybrid (Aa) and its homozygous recessive parent (aa) is called Test Cross. This cross is called test cross because it helps to find out whether the given dominant phenotype is homozygous or heterozygous.
(10) Monohybrid cross: When we consider the inheritance of one character at a time in a cross, this is called monohybrid cross.
(11) Dihybrid Cross: A cross made to study the inheritance of two pairs of contrasting traits.
🎯🎯🎯 @medical_entrance 🎯🎯🎯
➖➖➖➖➖➖➖➖➖➖➖➖
♦️Mendel’s Law of Inheritance♦️
(1) Mendelism means experiments performed by Mendel on genetics.
(2) Mendel’s experiment involved 4 steps as selection, hybridization, selfing and calculations. His results led to the formation of laws of genetics later.
(3) Mendel performed monohybrid and dihybrid crosses and gave three principles of inheritance.
(4) Mendel’s three principles of inheritance are:
(i) Law of dominance
(ii) Law of segregation or law of purity of gametes
(iii) Law of independent assortment
(5) Law of Dominance: The dominant characters are expressed when factors are in heterozygous condition.
(6) The recessive characters are only expressed in homozygous conditions. The characters never blend in heterozygous condition. A recessive character that was not expressed in heterozygous condition may be expressed again when it becomes homozygous.
(7) Law/Principle of segregation states that when a pair of contrasting factor or gene is brought together in a hybrid, these factors do not blend or mix up but simply associate themselves and remain together and separate at the time of gamete formation.
(8) Principle of independent assortment states that genes of different characters located in different pairs of chromosomes are independent of one another in this segregation during gamete formation.
(9) Test Cross: A cross between F1 hybrid (Aa) and its homozygous recessive parent (aa) is called Test Cross. This cross is called test cross because it helps to find out whether the given dominant phenotype is homozygous or heterozygous.
(10) Monohybrid cross: When we consider the inheritance of one character at a time in a cross, this is called monohybrid cross.
(11) Dihybrid Cross: A cross made to study the inheritance of two pairs of contrasting traits.
🎯🎯🎯 @medical_entrance 🎯🎯🎯
NEET AIIMS 2021-22
25 May, 13:25
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FOR THR FIRST TIME IN INDIA... by
Dr. Indumathi Somsundaram Mam
Researcher by Profession and Teacher by Passion..
In the field of teaching since 12years.. Know my profile here..
Exclusive Features:
*Detailed learning of every topic
*Whatsapp doubts solving
*Exposure to N NO OF MCQS...
*Detailed Notes on each topic
*daily practice test
*Daily guidance and motivation
*One to One sessions
*Guidance for self study plan and TT
* 360/360 Guarentee
EITHER CHOOSE ENTIRE PACKAGE @JUS RS. 1000/- inclusive of all 38 chapters...Or
Customise your difficult chapters.... @ just Rs. 100/- and avail all above features...
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Whatsapp: 8788382033
Telegram : @dr_indumathi
Email: [email protected]
Demo lecture
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Please share this message to all your friends and family.
NEET AIIMS 2021-22
25 May, 12:26
You have been invited to join classroom Biology Crash Course
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NEET AIIMS 2021-22
19 May, 01:16
👩🎓Download Disha AIIMS TOPIC wise pyq book pdf for free ~ Edu-Gram
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NEET AIIMS 2021-22
28 Apr, 04:37
Mnemonics bio 🐌
WBC
Trick - Nobody Likes My Education Background
Or
Never let monkey eats banana
Explanation
N: Neutrophils : Most abundant
L: Lymphocyte : Smallest corpuscle
M: Monocyte : Largest corpuscles
E: Eosinophils/Acidophils: BIlobbed
B: Basophils : Least abundant
for more -
Invite more friends to telegram channel for more posts
@iit_jee
@iit_math
@neet_iit_physics
@neet_iit_chemistry
@Medical_Entrance
@iit_foundation
@neet_biology
@mh_cet
WBC
Trick - Nobody Likes My Education Background
Or
Never let monkey eats banana
Explanation
N: Neutrophils : Most abundant
L: Lymphocyte : Smallest corpuscle
M: Monocyte : Largest corpuscles
E: Eosinophils/Acidophils: BIlobbed
B: Basophils : Least abundant
for more -
Invite more friends to telegram channel for more posts
@iit_jee
@iit_math
@neet_iit_physics
@neet_iit_chemistry
@Medical_Entrance
@iit_foundation
@neet_biology
@mh_cet
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