Papan Biswas

Papan Biswas Advertising and marketing agency.

13/04/2024

9 short rules for a better life:

1. Wake up early
2. Focus on effort, not results
3. Read every day
4. Strict with yourself, forgiving of others
5. Seek out challenges
6. Stay a student
7. Cut toxic people out of your life
8. Think about death
9. Focus on what you can control

12/04/2024

What is Life ?

Life is all about :

1 to 10 : Age Kitna

10 to 20 : Marks Kitna

20 to 30 : Salary Kitna

30 to 40 : Kids Kitna

40 to 50 : Wealth Kitna

50 to 60 : BP & Sugar Kitna

60 to 70 : Pension Kitna

After 70 : Aur Kitna ?

11/09/2023

Looking for a social media marketing expert! We're on the hunt for someone skilled in advertising and marketing on social platforms. If you've got the expertise, Contact me!

Thermodynamics best note
08/09/2022

Thermodynamics best note

Round object in pure rolling
06/09/2022

Round object in pure rolling

Thermodynamics sheet formula
06/09/2022

Thermodynamics sheet formula

06/09/2022

🔰INORGANIC IN SHOTS🔰

✌️Increasings or Decreasing Order

✨01. Melting point=
Li > Na > K > Rb > Cs

✨02. Colour of the flame=
Li-Red, Na-Golden, K-Violet, Rb-Red, Cs-Blue, Ca-Brick red, Sr-Blood red, Ba-Apple green

✨03. Stability of hydrides =
LiH > NaH > KH > RbH> CsH

✨04. Basic nature of hydroxides=
LIOH < NaOH < KOH < RbOH < CsOH

✨05. Hydration energy=
Li> Na > K> Rb > Cs

✨06.) Reducing character=
Li > Cs > Rb > K > Na

✨07. Stability of +3 oxidation state=
B> Al > Ga > In > T1

✨08. Stability of +1 oxidation state= Ga < In < TI

✨09. Basic nature of the oxides and hydroxides=
B< Al< Ga < In < TI

✨10. Relative strength of Lewis acid= BF3 < BCl3 < BBr3 < BI3

✨11. Ionisation energy=
B> Al In SiO2 > Ge02 > SnO2 > PbO2

✨15. Reducing nature of hydrides=
CH4 < SiH4 < GeH4 < SnH4 < PbH4

✨16. Thermal stability of tetrahalides=
CCl4> SiCl4> GeCl4> SnCl4 > PbCl4

✨17. Oxidising character of M+4 species=
GeCl4 < SnCl4 < PbCl4

✨18. Ease of hydrolysis of tetrahalides=
SiCl4 < GeCl4 < SnCl4 < PbCI4

✨19. Acidic strength of trioxides=
N203 > P2O3 > As2O3

✨20. Acidic strength of pentoxides=
N2O2 > P2O2> As202 > Sb2O2 > Bi̟202

✨21) Acidic strength of oxides of nitrogen=
N2O < NO PH3 > AsH3 > SbH3 > BiH3

✨23. Stability of trihalides of nitrogen=
NF3 > NCl3 > NBr3

✨24.Lewis base strength=
NF3 PCI3 > AsCl3 > SbCl3 > BiCl3

✨26.Lewis acid strength of trihalides of P, As, and Sb=
PCl3 > ASCl3 > SbCl3

✨27. Lewis acid strength among phosphorus trihalides
PF3 > PCl3 > PBr3 > PI3

✨(28) Melting and boiling point of hydrides=
H2O > H2Te > H2Se >H2S

✨29. Volatility of hydrides=
H2O < H2Te < H2Se < H2S

✨30. Reducing nature of hydrides=
H2S < H2Se < H2Te

✨31. Covalent character of hydrides=
H2O < H2S < H2Se < H2Te

✨32. The acidic character of oxides (elements in the same oxidation state)=
SO2 > SeO2 > TeO2 > PoO2
SO3 > SeO3 > TeO3

✨33. Acidic character of oxide of a particular element (e.g. S)=
SO < SO2 < SO3
SO2 > TeO2 > SeO2 > PoO2

✨34. Bond energy of halogens=
Cl2 > Br2 > F2 > I2

✨35. Solubility of halogen in water =
F2 > Cl2 > Br2 > I2

✨36. Oxidising power=
F2 > Cl2 > Br2 > I2

✨37. Enthalpy of hydration of X ion=
F- > Cl- > Br- >I-

✨38. Reactivity of halogens:=
F> Cl> Br > I

✨39. Ionic character of M-X bond in halides
= M-F > M-Cl > MBr > M-I

✨40. Reducing character of X ion:=
I- > Br- > Cl- > F-

✨41. Acidic strength of halogen acids=
HI > HBr > HCI > HF

✨42 Reducing property of hydrogen halides
= HF < HCL < HBr < HI

✨43. Oxidising power of oxides of chlorine
= Cl2O > ClO2 > Cl206 > Cl2O7

✨44. Decreasing ionic size=
02- > F- > Na+ > Mg2+

✨45 Increasing acidic property=
Na2O3 < MgO < ZnO< P205

✨46 Increasing bond length=
N2

06/09/2022

✔️Important SCIENCE (CHEMISTRY )

✅ Gases used in welding are ?
– Acetylene & Oxygen

✅ Gases used by sea divers for breathing are ?
– Oxygen & Helium

✅ Best sources for Vitamin D are?
– Sunlight & Fish liver

✅ Zinc Phosphide is used as?
– Rat Poison

✅ Fuse wire is made up of
– Lead and Tin

✅ Purest form of Iron is?
– Wrought Iron

✅ Radium is extracted from .
– Pitchblende

✅ Which agent is as ‘seed’ in artificial rain?
– Silver Iodide

✅ Oxides of metals are .
– Alkaline

✅ During the process of ‘rusting’ , the weight of iron .
–Increases

✅ (metal) is liquid at room temperature.
– Mercury

✅ What is the formula of common salt
– NaCl

✅ What is the maximum number of electrons that a p-orbital can hold
– 6

✅ What is used in fire extinguisher
– Sodium bicarbonate

✅ What is the nature of metal oxides
– Basic

✅ Which gas burns with popping sound
– Hydrogen

✅ Which metal is used for galvanization
– Zinc

✅ What is the nature of bleaching powder
– Oxidising agent

✅ Which is stored in Kerosene
– Sodium

✅ Phenolphthalein gives which color in acidic medium
– Colorless

✅ Which gas is used in cigarette lighters?
– Butane

✅ Biogas chiefly contains .
– Methane

✅ Chemical used as fixer in Photography is .
– Sodium thiosulphate

✅ Aspirin is
– Acetyl Salicylic Acid

✅ is also known as ‘Stranger Gas.’
– Xenon

✅ Natural rubber is a polymer derived from .
– Isoprene

The Seven Crystal System
06/09/2022

The Seven Crystal System

Unit and Dimension in one short
06/09/2022

Unit and Dimension in one short

Simple Harmonic Motion
06/09/2022

Simple Harmonic Motion

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