JEE NEET PDF STUDY MATERIALS

C-FRAME 📍 If we attach an Inertial frame of Reference with the centre of mass of many particle system then centre of mass in that frame of reference would be at rest or, Vcm=0 , and such type of reference frames are known as centre of mass frame of reference. 📍 Total Linear Momentum of a many particle system is zero in centre of mass frame of reference i.e., pcm=MVcm=0 since Vcm=0. 📍 Therefore C-reference frames are also known as zero momentum reference frames. 📍 Since in absence of any external force the centre of mass of any system moves with constant velocity in inertial frame of reference therefore for a many particle system C-frame of reference is an inertial frame of reference. 📍 Reference frames connected to laboratory are known as L-frame of reference or laboratory frame of reference. @pdfstudymaterialss

📚 POLYMERS - [CHEMISTRY] 📝 SHORT HANDWRITTEN NOTES @pdfstudymaterialss

Structure of Atoms SHORT NOTES @pdfstudymaterialss

GOC-1 @pdfstudymaterialss

NEET Test series pdf Free Download 2022 https://pdfstudymaterials.com/neet-test-series-pdf-free-download/

👉Physics Mindmaps [ Part - 1] @pdfstudymaterialss

✅ Aluminum ✍️Introduction ➖The metal with color silvery-white, soft, nonmagnetic, and ductile metal property, is known as aluminum. ➖The symbol of aluminum is ‘Al’ and its atomic number is ‘13.’ ➖The Chemical element aluminum belongs to the boron group. ➖Bauxite is the chief ore of the aluminum. ✍️Salient Features of Aluminum ➖Aluminum metal is a chemically reactive element. ➖Aluminum has the potential to resist corrosion and the process of this resistivity is known as passivation. ➖Aluminum is a comparatively durable, lightweight, soft, malleable, and ductile, metal. ➖Aluminum is nonmagnetic and does not get ignite easily. ➖An aluminum film is a very good reflector of visible light, as it reflects more than 90 percent of incoming rays. ➖Aluminum commonly reacts with water and forms hydrogen. ➖Aluminum is the metal of low density and it has the property to resist corrosion. ➖Aluminum has the property of heat and electricity conductivity and hence, it is a good conductor. ✍️Occurrence of Aluminum ➖Aluminum makes up (about) 8 percent of the Earth's crust. ➖After oxygen and silicon, aluminum is the third most abundant element; however, it is the most abundant metal in the crust. ➖When hydrogen fuses with magnesium, it creates stable aluminum. ➖Aluminum naturally found in oxides or silicates states. ✍️Compounds of Aluminum ➖Alumina - Al2O3 ➖Aluminum chloride - AlCl3 ➖Aluminum sulphate - Al2(SO4)3 ➖Aluminum hydroxide - Al(OH)3 ➖Aluminum carbide - Al4C3 ✍️Usage of Aluminum ➖Aluminum is used in transportation industries, such as railway, automobiles, aircraft, spacecraft, trucks, marine vessels, bicycles, etc. ➖Aluminum is used in packaging some specific materials. ➖Aluminum is used in the constructions of doors, windows, building wire, sheathing, roofing, etc. ➖Aluminum is largely used in making electric wire. ➖Aluminum is used in making home appliances and many other household items, such as cooking utensils. ➖Aluminum is used in baseball bats, watches, and many more such kind of stuffs. ➖Aluminum is used in photographic equipment. ➖Aluminum is used in electronic appliances. ➖Aluminum is used as light reflector, as it is a good light reflector; basically, some of the materials are aluminum coated specially to reflect light. ➖Aluminum is used in production of hydrogen gas by reaction with hydrochloric acid. ➖Aluminum is used in manufacturing musical instruments. @pdfstudymaterialss

Chemical Control and Coordination @pdfstudymaterialss

NOTES OF PHYSICS CLASS 12 🔥NCERT CHAPTER 1ST🔥 👉ELECTRIC CHARGE AND FIELD @pdfstudymaterialss

CHEMICAL BONDING HANDWRITTEN NOTES @pdfstudymaterialss

CHEMICAL BONDING HANDWRITTEN NOTES @pdfstudymaterialss

✡️Notes on Atomic Physics✡️ e/m of an electron (Thomson Method):- (a) e/m of a particle is called the specific charge of the particle. e/m = v/rB Here, r is the radius of curvature, B is the strength of magnetic field, v is the velocity, e is the charge on cathode ray particle and m is the mass. (b) v = E/B Electric field:- E = V/d Photo electric effect:- Photo-electric effect is the phenomenon of emission of electrons from the surfaces of certain substances, mainly metals, when light of shorter wavelength is incident upon them. Effect of collector’s potential on photoelectric current:- (a) Presence of current for zero value potential indicates that the electrons are ejected from the surface of emitter with some energy. (b) A gradual change in the number of electrons reaching the collector due to change in its potential indicates that the electrons are ejected with a variety of velocities. (c) Current is reduced to zero for some negative potential of collector indicating that there is some upper limit to the energy of electrons emitted. (d) Current depends upon the intensity of incident light. (e) Stopping potential is independent of the intensity of light. Effect of intensity of light:- The photoelectric currentis directly proportional to theintensity of incident radiation. Effect of frequency of light:- (a) Stopping potentialdepends upon thefrequency of light. Greater the frequency of light greater is the stopping potential. (b) Saturation current is independent of frequency. (c) Threshold frequency is the minimum frequency, that capable of producing photoelectric effect. Laws of Photoelectricity:- (a) Photoelectric effect is an instantaneous process. (b) Photoelectric current is directly proportional to the intensity of incident light and is independent of its frequency. (c) The stopping potential and hence the maximum velocity of the electrons depends upon the frequency of incident light and is independent of its frequency. (d) The emission of electrons stops below a certain minimum frequency known as threshold frequency. Energy contained in bundle or packet:- E = hf = hc/λ Here h is the Planck’s constant and f is the frequency. Work function:- It is defined as the minimum energy required to pull an electron out from the surface of metal. It is denoted by W0. Einstein’s equation of photoelectric effect:- (a) ½ mvmax2 = hf – W0 (b) ½ mvmax2 = hf – hf0 = h(f- f0) = h [c/λ – c/λ0] (c) eV0 = hf - W0 (d)V0 = [(h/e)f] – [W0/e] Here f0 is threshold frequency. Threshold frequency (f0):- f0 = work function/h = W/h Maximum kinetic energy of emitted photo electrons:- ?Kmax= ½ mvmax2 = eV0 Threshold wavelength:- λ0 = c/f0 = hc/hf0 = hc/W Slope of V0~ v graph:- Slope= h/e Rest mass of photon = 0, Charge = 0 Energy of photon:- E = hf = hc/λ Momentum of photon:- p = E/c = h/λ = hf/c Mass od photon:- m = E/c2 = h/cλ = hf/c2 For electron, λe = [12.27/√V]Å For proton, λp = [0.286/√V]Å For alpha particle, λα = [0.286/√V]Å For particle at temperature T, λ = h/√3mKT (E = 3/2 KT) The wavelength of electron accelerated by potential difference of V volts is:- λe= [12.27/√V]Å Number of photons:- (a) Number of photons per sec per m2, np = Intensity/hf (b) Number of photons incident per second, np = Power/hf (c) Number of electrons emitted per second = (efficiency per surface)× (number of photons incident per second) Compton wave length:- (a) λc = h/m0c Here h is the Planck’s constant, m0 is the rest mass of electron and c is the speed of light. (b) Change in wavelength:- λ' – λ =λc (1-cos?) de Broglie wavelength (λ):-λ = h/mv = h/√(2mE) = h/√(2meV) In accordance to Bohr’s postulate of atomic structure, the angular momentum of an electron is an integral multiple of h/2π. So, mvr = nh/2π Bragg’s diffraction law:- 2dsinθ = nλ Here λ is the wavelength of electron and d is distance between the planes. Rutherford’s atomic model (α-particle scattering):- (a) N(θ) ∝ cosec4(θ/2) (b) Impact parameter, b = [(Ze2) (cot θ/2)]/[(4πε0)E] Here, E = ½ mv2 = KE of theα particle.

Reactions Aldehydes and Ketones @pdfstudymaterialss

🎀IMPORTANT NOTES🎀 1) Red color of carrot and tomato is due to: ✍️ anthocyanin 2) P.H of human blood is ✍️ 7.0 3) Largest organ inside human body is: ✍️ Liver 4) Largest organ of human body is: ✍️ skin 5) What is celluloses: ✍️ Carbohydrates 6) The smallest of all human cells are: ✍️ RBCs 7) No of bones in human body is: ✍️ 206 8) Smallest unit of life is: ✍️ Cell 9) Red blood cells have no: ✍️ Nucleus 10) White blood cells are also known as: ✍️ Leucocytes 11) Red blood cells are also known as: ✍️ Erythrocytes 12) Life appeared on earth about: ✍️ 3 billion years ago 13) When earth was formed its atomsphere were composed of: ✍️ Water vapour, ammonia and Methane 14) Biochemical organ of life is discovered by: ✍️ Oparin 15) Group of cells are termed as: ✍️ Tissue 16) Kingdom fungi are known as: ✍️ Decomposer 17) Which cell organelles not participate in cell division: ✍️ Ribosomes 18) Longest bone in human body is: ✍️ Femur 19) Shortest bone in human body is: ✍️ Stapes 20) Most important food is derived from: ✍️ Fruits 21) After human most intelligent mammal is: ✍️ Dolphins 22) Prokaryot doesn't possess: ✍️ Nucleus 23) Eukaryot has a: ✍️ Nucleus 24) In bacterial cell..............is not found: ✍️ Golgi apparatus 25) ................Is found in plant cell while in animal cell it is absent. ✍️ Cell wall @pdfstudymaterialss

Circular Motion Notes @pdfstudymaterialss

🧜‍♂️Vitamins_Deficiency🧜‍♂️ (Very Very...... Important for NEET) 1- Vitamin “A”: Night blindness 2- Vitamin “B1”: Beriberi 3- Vitamin “B2”: Ariboflavinosis 4- Vitamin “B3”: Pellagra 5- Vitamin “B5”: Parestheia 6- Vitamin “B6”: Anemia 7- Vitamin “B7”: Dermititis and enteritis 8- Vitamin “B9” - “B12”: Megaloblastic anemia 9- Vitamin “B17”: Cancer 10- Vitamin “C”: Scurvy and swelling of gums 11- Vitamin “D”: Rickets and Osteomalacia 12- Vitamin “E”: less fertility 13- Vitamin “K”: Non-Clotting of blood @pdfstudymaterialss

Waves & Oscillation short notes @pdfstudymaterialss

Comprehensive Physics for JEE Advanced Tata McGraw Hill pdf https://pdfstudymaterials.com/comprehensive-physics-for-jee-advanced-tata-mcgraw-hill-pdf/

Isomerism Handwritten Notes

🌺🌺🌺🌺🌺𝐒𝐎𝐌𝐄 𝐈𝐌𝐏𝐎𝐑𝐓𝐀𝐍𝐓 𝐂𝐎𝐍𝐍𝐄𝐂𝐓𝐈𝐍𝐆 𝐋𝐈𝐍𝐊𝐒 𝐁𝐄𝐓𝐖𝐄𝐄𝐍 𝐆𝐑𝐎𝐔𝐏𝐒🌺🌺🌺🌺🌺🌺 1. Bacteria & Fungi 🌸 Actinomycetes 2. Reptiles & Birds 🌸 Archaeopteryx 3. Chordates & Non-chordates 🌸 Balanoglossus 4. Cartilaginous & Bony fishes 🌸 Chimera (Rabbit fish/Ratfish) 5. Bryophytes & Pteridophytes 🌸 Club moss 6. Coelenterates & Platyhelminthes 🌸 Ctenophora 7. Pteridophytes & Gymnosperms 🌸Cycas 8. Reptiles & Mammals 🌸 Echidna (Spiny ant eater) 9. Animals & Plants 🌸 Euglena 10. Gymnosperms & Angiosperms 🌸 Gnetum 11. Protista & Bryophytes 🌸Hornworts 12. Pisces & Amphibia 🌸 Latimeria 13. Protista & Fungi 🌸 Myxomycetes 14. Annelida & Mollusca 🌸Neopilina 15. Reptiles & Mammals 🌸 Ornithorhynchus (Duck billed platypus) 16. Annelida & Arthropoda 🌸Peripatus (walking worm) 17. Protozoa & Porifera 🌸 Proterospongia 18. Bony fishes & Amphibia 🌸 Protopterus (Lung fishes) 19. Virus & Bacteria 🌸 Rickettsia 20. Amphibia & Reptiles 🌸Seymouria 21. Amphibia & Reptilia 🌸 Sphenodon (Living fossil lizard) 22. Echinodermata & Chordata 🌸 Tornaria larva 23. Annelida & Mollusca 🌸 Trochophore larva 24. Living & non-living 🌸Virus 25. Protozoa & Metazoa 🌸Xenoturbella pdfstudymaterialss