Chemistry some important points. NEET.

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✌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 <Ga > 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 <N2O3 <N2O4 < 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 <NCl3 <NBr3 < 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 <ICl <HIO4

✨50. Increasing thermal stability=

HOCl < HOClO < HOClO2 < HOClO3

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