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2021-05-30 13:07:15 CLEAR YOUR BASIC CONCEPTS OF PHYSICAL CHEM WITH Y-MAP TRICK








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2021-05-30 11:46:07 Chapter 3 Motion in a straight

Motion:-

Rest and Motion are relative terms, nobody can exist in a state of absolute rest or of absolute motion.

One dimensional motion:-

The motion of an object is said to be one dimensional motion if only one out of three coordinates specifying the position of the object change with time. In such a motion an object move along a straight line path.

Two dimensional motion:-

The motion of an object is said to be two dimensional motion if two out of three coordinates specifying the position of the object change with time. In such motion the object moves in a plane.

Three dimensional motion:-

The motion is said to be three dimensional motion if all the three coordinates specifying the position of an object change with respect to time ,in such a motion an object moves in space.

Path length :-

The path length traversed by an object between two points is not the same as the magnitude of displacement always. The displacement depends only on the end points; whereas the path length depends on the actual path. The two quantities are equal only if the object does not change its direction during the course of its motion. In all other cases, the path length is greater than the magnitude of displacement.

Average speed :-

The average speed of an object is greater than or equal to the magnitude of the averagevelocity over a given interval of time. The two are equal only if the path length is equal to the magnitude of the displacement.

Displacement

A displacement is the shortest distance from the initial to the final position of a point P. Thus, it is the length of an imaginary straight path, typically distinct from the path actually travelled by P. A displacement vector represents the length and direction of this imaginary straight path.

The magnitude of displacement is less than or equal to the actual distance travelled by the object in the given time interval.

Displacement ≤ Actual distance

Speed

It is rate of change of distance covered by the body with respect to time.

Speed = Distance travelled /time taken

Speed is a scalar quantity .
Its unit is meter /sec.
Dimensional formula of speed is [M0L1 T -1 ] .
It is positive or zero but never negative.

Uniform Speed:-

If an object covers equal distances in equal intervals of time than the speed of the moving object is called uniform speed. In this type of motion, position – time graph is always a straight line.

Instantaneous speed:-

The speed of an object at any particular instant of time is called instantaneous speed. In this measurement, the time ∆t→0. When a body is moving with uniform speed its instantaneous speed = Average speed = uniform speed.

Velocity:-

The rate of change of position of an object in a particular direction with respect to time is called velocity. It is equal to the displacement covered by an object per unit time.

Velocity =Displacement /Time

Velocity is a vector quantity
its SI unit is meter per sec.
Its dimensional formula is [M0L1 T -1 ].
It may be negative, positive or zero.
When a body moves in a straight line then the average speed and average velocity are equal.

Acceleration:-

The rate of change of velocity of an object with respect to time is called its acceleration.

Acceleration = Change in velocity /time taken

It is a vector quantity,
Its SI unit is meter/ sec2
Its dimension is [M0L1 T -2 ].
It may be positive ,negative or zero.

Positive Acceleration:-

If the velocity of an object increases with time, its acceleration is positive .

Negative Acceleration :-

If the velocity of an object decreases with time, its acceleration is negative . The negative acceleration is also called retardation or deacceleration.

Formulas of uniformly accelerated motion along straight line:

Free fall :-

In the absence of the air resistance all bodies fall with the same acceleration towards earth from a small height. This is called free fall. The acceleration with which a body falls is called gravitational acceleration (g).Its value is 9.8 m/sec2 . Open / Comment

2021-05-29 17:30:56 VIMP- DO OR DIE
»»

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
12. Reactivity=
C
13. Metallic character=
C< Si < Ge < Sn < Pb

14. Acidic character of the oxides=
Co2 > 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
22. Basic nature/ bond angle/ thermal stability and dipole moment of hydrides=
NH3 > PH3 > AsH3 > SbH3 > BiH3

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

24.Lewis base strength=
NF3
25. Ease of hydrolysis of trichlorides=
NCl3 > 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 <02 < F2 < CL2

47 Increasing size=
Ca2+ < Cl- < S2-

48 Increasing acid strength=
HClO < HClO2 < HClO3 < HClO4

49 Increasing oxidation number of iodine=
HI< I2
50. Increasing thermal stability=
HOCl < HOClO < HOClO2 < HOClO3
»»----☆-------

𝙆𝙚𝙚𝙥 𝙨𝙩𝙪𝙙𝙮𝙞𝙣𝙜, 𝙠𝙚𝙚𝙥 𝙨𝙪𝙥𝙥𝙤𝙧𝙩𝙞𝙣𝙜.

🅂🄷🄰🅁🄴 🅆🄸🅃🄷 🅈🄾🅄🅁 🄵🅁🄸🄴🄽🄳🅂
▭▬▭▬▭▬▭▬▭▬▭▬▭▬
𝐅𝐎𝐑 𝐌𝐎𝐑𝐄 𝐂𝐎𝐍𝐓𝐄𝐍𝐓
𝐉𝐎𝐈𝐍

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2021-05-29 16:30:17 Online में भेड़ बकरियों की तरह पढ़कर समय और पैसा बर्बाद न करे

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2021-05-29 11:15:09 BENZENE ALL REACTIONS IN 2 PAGES

HANDWRITTEN NOTES

𝙆𝙚𝙚𝙥 𝙨𝙩𝙪𝙙𝙮𝙞𝙣𝙜, 𝙠𝙚𝙚𝙥 𝙨𝙪𝙥𝙥𝙤𝙧𝙩𝙞𝙣𝙜.

🅂🄷🄰🅁🄴 🅆🄸🅃🄷 🅈🄾🅄🅁 🄵🅁🄸🄴🄽🄳🅂
▭▬▭▬▭▬▭▬▭▬▭▬▭▬
𝐅𝐎𝐑 𝐌𝐎𝐑𝐄 𝐂𝐎𝐍𝐓𝐄𝐍𝐓
𝐉𝐎𝐈𝐍

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2021-05-29 08:54:46 PHYSICS : NEWTONS LAWS OF MOTION

HANDWRITTEN NOTES

🅂🄷🄰🅁🄴 🅆🄸🅃🄷 🅈🄾🅄🅁 🄵🅁🄸🄴🄽🄳🅂
▭▬▭▬▭▬▭▬▭▬▭▬▭▬
𝐅𝐎𝐑 𝐌𝐎𝐑𝐄 𝐂𝐎𝐍𝐓𝐄𝐍𝐓
𝐉𝐎𝐈𝐍

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2021-05-28 20:20:31 Commercial and chemical names of common chemicals

✺ Business Name
➭ IUPAC Name
➛ molecule formula

✺ chalk
➭ calcium carbonate
➛ CaCO₃

grape extract
➭ glucose
➛ C6H₁₂O6

✺ Alcohol
➭ ethyl
➛ C₂H5OH

✺ Caustic Potash
➭ potassium hydroxide
➛ KOH

4 Eating Soda
➭ sodium bicarbonate
➛ NaHCO₃

4 lime
➭ calcium oxide
➛ CaO

✺ Gypsum
➭ calcium sulfate
➛ CaSO₄.2H₂O

✺ tnt
Tri Nitro Tallinn
➛ C6H₂CH₃ (NO₂) ₃

✺ washing soda
➭ sodium carbonate
➛ Na₂CO₃

✺ blue blue
copper sulphate
➛ CuSO₄

✺ saline
➭ ammonium chloride
➛ NH₄Cl

✺ alum
➭ potassium aluminum sulfate
➛ K₂SO₄Al₂ (SO₄) ₃.24H₂O

Extinguished lime
➭ calcium hydroxide
➛ Ca (OH) ₂

Om Mand
4 starch
➛ C6H10O5

✺ Laughing Gas
➭ nitrous oxide
➛ N₂O

✺ red medicine
➭ potassium permanganate
➛ KMnO₄

✺ red vermilion
➭ lead paraxide
➛ Pb₃O₄

✺ dry ice
➭ solid carbon dioxide
➛ CO₂

Om Shora
➭ potassium nitrate
➛ KNO₃

✺ vinegar
Acetic acid dilute solution
➛ CH₃COOH

✺ icing
➭ borax
➛ Na₂B₄O7.10H₂O

✺ spirit
➭ Methyl Alcohol
➛ CH₃OH

✺ slate
➭ silica aluminum oxide
➛ Al₂O₃2SiO₂.2H₂O

✺ green case
➭ ferric sulfate
➛ Fe₂ (SO₄) ₃


🅂🄷🄰🅁🄴 🅆🄸🅃🄷 🅈🄾🅄🅁 🄵🅁🄸🄴🄽🄳🅂
▭▬▭▬▭▬▭▬▭▬▭▬▭▬
𝐅𝐎𝐑 𝐌𝐎𝐑𝐄 𝐂𝐎𝐍𝐓𝐄𝐍𝐓
𝐉𝐎𝐈𝐍

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