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2021-05-18 08:53:02 ORGANIC CHEMISTRY
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𝐅𝐎𝐑 𝐌𝐎𝐑𝐄 𝐂𝐎𝐍𝐓𝐄𝐍𝐓
𝐉𝐎𝐈𝐍

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2021-05-17 15:51:03 WORK POWER & ENERGY

HANDWRITTEN NOTES

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𝐅𝐎𝐑 𝐌𝐎𝐑𝐄 𝐂𝐎𝐍𝐓𝐄𝐍𝐓
𝐉𝐎𝐈𝐍

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2021-05-17 12:37:01 Anybody wants to take unacademy subscription for Neet/Iit Jee/gate can message me for max discounts.

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2021-05-17 08:50:08 Funny mnemonics which will help you learn periodic table easily

S-BLOCK ELEMENT:
S-BLOCK element has similar physical and chemical properties.

Group 1 include lithium(li),Sodium(Na),Potassium(K),Rubidium(Ru),Caseium(Cs),and Francium(Fr)hence known as alkali metal.

MNEMONIC FOR THIS GROUP:

LiNa ki Ruby Cse Friendship hai.


Group 2 includes Beryllium(Be),Magnesium(Mg),Calcium(Ca),Strontium(Sr),Barium(Br),and Radium(Ra).hence known as alkali earth metal.

MNEMONIC for this group:

Beta Mange Car Scooter Baap rone se Razi

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2021-05-16 15:50:07 P-BLOCK ELEMENT:

This block contains non-metal, semi-metal and poor metals. P-BLOCK element the last six group of the periodic table(group 13 to 18) have their own valence electron.

GROUP 13 is known as Boron group and it consist of Boron(B),Aluminium(Al),Gallium (Ga),Indium(In),and Thallium(Ti).

MNEMONIC for this group:
B A G I T

Group 14 consist of Carbon(C),Silicon(Si),Germanium (Ge),Tin(Sn),and lead(Pb)and known as carbon group

MNEMONIC for this group:

Chemistry Sir Gives Sanki Problems

Group 15 includes Nitrogen(N),Phosphorus(P),Arsenic(As),Antimony(Sb),and Bismuth(Bi) and known as nitrogen group.

MNEMONIC for this group:

Nahi Pasand Aise Sab Bhai

GROUP 16 contains Oxygen(O) sulphur (S), Selenium(S), Tellurium(Te), and Polonium(Po) and are these are known as oxygen group.

MNEMONIC for this group:

Oh! Style Se Tel Polish

Group 17 Fluorine (F), Chlorine(Cl),Bromine(Br),Iodine(I),and Astatine(At) and these groups are known as Halogens.

MNEMONIC for this group:
Fir Call Kar Bahaar AayI Aunty

Group 18 consist of Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn) and known group of noble gasses except Helium.

MNEMONIC for this Group:

He Never Arrived; Kara Xero Run pe Out

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2021-05-16 14:53:16 WHICH BOOK IS BEST FOR NEET PREVIOUS YEARS?

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2021-05-16 08:47:56 Terminologies in Progressive Wave Motion

Amplitude
Period
Wavelength
Frequency
Wave velocity
Phase or phase angle (O)
Phase difference
Path difference
Time difference


Amplitude (A): The amplitude of a wave is the maximum displacement of any particle of the medium from its equilibrium position.

Period (T): Period (T) of a wave is the time taken by any particle of the medium to complete one vibration during a period (T).

Wavelength (λ): Wavelength (λ) is equal to the distance between two consecutive particles of the medium which are in the same state of vibration it is equal to the distance travelled by the wave by its time period (T).

Frequency (f): It is the number of vibrations made per second by any particles of the medium (f = 1/T). Since the frequency of a wave is a characteristic property of the source which is producing the wave motion, hence, the frequency of a wave does not change when a wave travels from one medium to another medium.

Phase or Phase Angle (Φ): It represents the state of vibration of the particle of a medium with respect to its mean position.

Phase Difference Δ(Φ): It represents the different state of vibration of a particle at two different instants (or) any pair of particles at the same instant. ΔΦ = Φ2 – Φ1.

Wave Velocity (v): It is the distance travelled by the wave in one second (v = λ/T). It is determined by the mechanical properties of the medium through which the wave propagates. The velocity of wave motion is measured with respect to the medium, the wave velocity changes when the medium is in motion i.e. speed of sound through air changes when the wind is blowing.

⇒ Check: Sound Waves

There are two velocities associated with a wave. One is the wave velocity and the other one is particle velocity (which is the speed with which the particle of the medium vibrate when the wave passes through the medium).

Path Difference (Δx) or (x): It indicates the distance between two points measured along the direction of propagation of the wave through the medium.

Time Difference (ΔT): It indicates the time taken by the wave to travel from one point to another through the medium.

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2021-05-15 14:46:23 ISOMERISM HANDWRITTEN NOTES

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