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The latest Messages 9

2021-12-09 16:58:12 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
27 views13:58
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2021-12-09 15:34:59
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35 views12:34
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2021-12-04 17:26:14 CHECKLIST CHECK

PHYSICS

CHEMISTRY

BIOLOGY
92 views14:26
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2021-11-29 17:16:52 Male Reproductive System

1. The elastic tissue which connects the cauda epididymis to the scrotal sac is
(a) Caput epididymis
(b) Scrotal ligament
(c) Gubernaculum
(d) Tendinous cord

2. By the contraction of the spermatic cord, the testis of man are not taken to the abdominal cavity due to this structure
(a) fat bodies and gubernaculum present over the testis
(b) attachment of testis by gubernaculum to the scrotal sac only
(c) narrowness of inguinal canal
(d) both (b) and (c)


3. The seminiferous tubules of the testis are lined by the germinal epithelium consisting of
(a) spermatids
(b) cells of Sertoli
(c) spermatogonium
(d) spermatocytes


4. These cells of the testes secrete testosterone
(a) Sertoli cells
(b) cells of germinal epithelium
(c) Cells of Leydig or interstitial cells
(d) secondary spermatocytes


5. There is a connective tissue cord extending between the testis and abdominal wall known as
(a) mesenteric cord
(b) gubernaculum
(c) testis cord
(d) spermatic cord


6. Which of these is an accessory reproductive gland in male mammals
(a) Inguinal gland
(b) Prostate gland
(c) Mushroom-shaped gland
(d) Gastric gland


7. There are some special types of cells present in the seminiferous tubules known as Sertoli cells which are
(a) somatic cells
(b) germinal cells
(c) protective cells
(d) reproductive cells


8. Seminiferous tubules develop central lumen after
(a) Old age
(b) Prepuberal time
(c) Birth
(d) Puberty


9. Another name for Bulbourethral gland is
(a) Meibomian gland
(b) Prostate gland
(c) Perineal gland
(d) Cowper’s gland


10. In man, Cryptorchidism is the condition when
(a) testes do not descent into the scrotum
(b) there are two testes in each scrotum
(c) testis degenerates in the scrotum
(d) testis enlarges in the scrotum
50 views14:16
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2021-11-29 15:44:08
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7 views12:44
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2021-11-29 14:32:52 𝐌𝐧𝐞𝐦𝐨𝐧𝐢𝐜𝐬 and 𝐭𝐫𝐢𝐜𝐤𝐬 for 𝐟𝐮𝐧𝐠𝐢 𝐞𝐱𝐚𝐦𝐩𝐥𝐞𝐬.

𝐁𝐚𝐬𝐢𝐝𝐨𝐦𝐲𝐜𝐞𝐭𝐞𝐬-
𝐓𝐫𝐢𝐜𝐤:- Agar Usne Puccha To 𝐁𝐚𝐬.

𝐀𝐠𝐚𝐫- Agaricus (mushroom)

𝐔𝐬𝐧𝐞- Ustilago (rust fungus)

𝐏𝐮𝐜𝐡𝐡𝐚- Puccnia (smut fungus)

Ascomyce𝐭𝐞𝐬-
𝐓𝐫𝐢𝐜𝐤:- Yash and Astha ne Naya Pencil 𝐊𝐡𝐚𝐫𝐢𝐝𝐚

𝐲𝐚𝐬𝐡- Yeast

𝐀𝐬𝐭𝐡𝐚- 𝐀𝐬𝐩𝐞𝐫𝐞𝐠𝐢𝐥𝐥𝐮𝐬

𝐍𝐚𝐲𝐚- 𝐍𝐞𝐮𝐫𝐨𝐬𝐩𝐨𝐫𝐚

𝐩𝐞𝐧𝐜𝐢𝐥- Penecillium

Many 𝐦𝐞𝐦𝐛𝐞𝐫𝐬 like 𝐦𝐨𝐫𝐞𝐥𝐬 and 𝐛𝐮𝐟𝐟𝐥𝐞𝐬 are e𝐞𝐝𝐢𝐛𝐥𝐞 and are considered 𝐝𝐞𝐥𝐢𝐜𝐚𝐜𝐢𝐞𝐬.

𝐏𝐡𝐲𝐜𝐨𝐦𝐲𝐜𝐞𝐭𝐫𝐬-
𝐓𝐫𝐢𝐜𝐤𝐬:-RaMu Alu Pheco
Ra- Rhyzopus (bread mould)

𝐌𝐮- Mucor

𝐀𝐥𝐮- Albugo (parasitic fungi on mustard)

𝐏𝐡𝐞𝐜𝐨- Pythium

𝐃𝐞𝐮𝐭𝐞𝐫𝐨𝐦𝐲𝐜𝐞𝐭𝐞𝐬 _
𝐓𝐫𝐢𝐜𝐤𝐬:- 𝐀𝐂𝐓

𝐀- alterneria

𝐂- Collectotrichum

𝐓 - 𝐓𝐫𝐢𝐜𝐡𝐨𝐝𝐞𝐫𝐦𝐚


22 views11:32
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2021-11-28 15:56:03 Important Facts About Human Body
=========================

Largest and strongest Bone in the body:
Femur (thigh bone)

Smallest Bone in the body
Stapes in ear

Number of Cells in the body
75 trillion

Volume of Blood in the body
6 litres (in 70 kg body)

Number of Red Blood Cells(R.B.C.)
In male: 5 to 6 million/cubic mm
In female: 4 to 5 million/cubic mm

Life span of Red Blood Cells(R.B.C.)
100 to 120 days

Life span of White Blood Cell(W.B.C.)
3-4 days

Normal White Blood Cell(W.B.C.) count
5000-10000/cubic mm

Time taken by R.B.C. to complete one cycle of circulation:
20 seconds

Other name of Red Blood Cell (R.B.C.):
Erythrocytes

Largest White Blood Cells:
Monocytes

Smallest White Blood Cells:
Lymphocyte

Who discovered Blood Group:
Karl Landsteiner

Blood Platelets count:
150,000 - 400,000 platelets per micro litre

Haemoglobin (Hb):
In male: 14-15 gm/100 c.c. of blood
In female: 11-14 gm/100 c.c. of blood

Hb content in body:
500-700 gm

pH of Urine:
6.5-8

pH of Blood:
7.36-7.41

Volume of Semen:
2-5 ml/ejaculation

Pulse rate:
72 per minute

Thinnest Skin:
Eyelids

Weight of Heart:
200-300 gm

16 views12:56
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2021-11-28 15:55:39
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2021-11-28 14:22:42 NON-CHORDATES ENDED NOW CHORDATES HERE IS
𝘾𝙇𝘼𝙎𝙎 𝘼𝙈𝙋𝙃𝙄𝘽𝙄𝘼:-


The characteristics of the organisms present in class amphibia are as follows:

These can live both on land and in water.

They are ectothermic animals, found in a warm environment.

Their body is divided into head and trunk. The tail may or may not be present.

The skin is smooth and rough without any scales, but with glands that make it moist.

They have no paired fins. Unpaired fins might be present.

They have two pairs of limbs for locomotion.

They respire through the lungs and skin. Gills might be present externally in some adults.

The heart is three chambered.

The kidneys are mesonephric. The excretory material includes ammonia and urea.

They possess ten pairs of cranial nerves.

The lateral line is present during their development.

The sexes are separate and fertilization is usually external. However, in salamanders, the fertilization is internal.

Development is indirect with metamorphosis.

Breeding occurs in water. The copulatory organs are absent in males.

Eg., Frogs, Salamanders

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2021-11-28 13:19:13
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