Increasing or Decreasing Order

20240705 101039

Increasing or Decreasing Order</chem>

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 <TI

12. Reactivity
C<Si<Ge< Sn <Pb

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 2O3 2O4 < N2O5

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 3 3 < NI3

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 4

50. Increasing thermal stability
HOCl < HOClO < HOClO2 < HOClO3

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