Melting Point of Alkali Metals: 

Li > Na > K > Rb > Cs

Colour of Flame:

• Li: Crimson Red

• Na: Yellow

• K: Lilac (Violet)

• Rb: Red-violet

• Cs: Blue

• Ca: Brick Red

• Sr: Crimson

• Ba: Apple Green

Stability of Alkali Metal Hydrides: 

LiH > NaH > KH > RbH > CsH

Basic Nature of Hydroxides: 

LiOH < NaOH < KOH < RbOH < CsOH

Hydration Energy: 

Li⁺ > Na⁺ > K⁺ > Rb⁺ > Cs⁺

Reducing Character of Alkali Metals: 

Li < Cs < Rb < K < Na

Stability of +3 Oxidation State: 

B > Al > Ga > In > Tl

Stability of +1 Oxidation State: 

Ga < In < Tl

Basic Nature of Oxides and Hydroxides: 

B < Al < Ga < In < Tl

Relative Strength of Lewis Acids: 

BF₃ < BCl₃ < BBr₃ < BI₃

Ionisation Energy: 

B > Al > Ga > In > Tl

Melting Point of Group 14 Dioxides: 

SiO₂ > GeO₂ > SnO₂ > PbO₂

Reducing Nature of Group 14 Hydrides: 

CH₄ < SiH₄ < GeH₄ < SnH₄ < PbH₄

Thermal Stability of Tetrahalides: 

CCl₄ > SiCl₄ > GeCl₄ > SnCl₄ > PbCl₄

Oxidising Character of M+4 Species: 

GeCl₄ < SnCl₄ < PbCl₄

Ease of Hydrolysis of Tetrahalides: 

SiCl₄ > GeCl₄ > SnCl₄ > PbCl₄

Acidic Strength of Trioxides: 

N₂O₃ > P₂O₃ > As₂O₃

Acidic Strength of Pentoxides: 

N₂O₅ > P₂O₅ > As₂O₅ > Sb₂O₅ > Bi₂O₅

Acidic Strength of Hydrides: 

PH₃ > AsH₃ > SbH₃ > BiH₃

Stability of Nitrogen Trihalides: 

NF₃ > NCl₃ > NBr₃ > NI₃

Lewis Base Strength: 

NF₃ < PF₃ < AsF₃ < SbF₃ < BiF₃

Lewis Acid Strength of Trihalides (P, As, Sb): 

PCl₃ > AsCl₃ > SbCl₃

Lewis Acid Strength among Phosphorus Trihalides: 

PF₃ < PCl₃ < PBr₃ < PI₃

Melting and Boiling Points of Hydrides: 

H₂O > H₂Te > H₂Se > H₂S

Volatility of Hydrides: 

H₂O < H₂Te < H₂Se < H₂S

Reducing Nature of Hydrides: 

H₂S < H₂Se < H₂Te

Covalent Character of Hydrides: 

H₂O < H₂S < H₂Se < H₂Te

Acidic Character of Oxides (Elements in the Same Oxidation State): 

SO₂ > SeO₂ > TeO₂ > PoO₂ SO₃ > SeO₃ > TeO₃

Acidic Character of Oxides of a Particular Element (e.g., S): 

SO < SO₂ < SO₃ SO₂ > SeO₂ > TeO₂ > PoO₂

Bond Energy of Halogens: 

Cl₂ > Br₂ > F₂ > I₂

Solubility of Halogen in Water: 

F₂ > Cl₂ > Br₂ > I₂

Oxidising Power: 

F₂ > Cl₂ > Br₂ > I₂

Enthalpy of Hydration of X Ion: 

F⁻ > Cl⁻ > Br⁻ > I⁻

Reactivity of Halogens: 

F₂ > Cl₂ > Br₂ > I₂

Ionic Character of M-X Bond in Halides: 

M-F > M-Cl > M-Br > M-I

Reducing Character of X Ion: 

I⁻ > Br⁻ > Cl⁻ > F⁻

Acidic Strength of Halogen Acids: 

HI > HBr > HCl > HF

Reducing Property of Hydrogen Halides: 

HF < HCl < HBr < HI

Oxidising Power of Oxides of Chlorine: 

Cl₂O > ClO₂ > Cl₂O₆ > Cl₂O₇

Decreasing Ionic Size: 

O²⁻ > F⁻ > Na⁺ > Mg²⁺

Increasing Acidic Property: 

Na₂O < MgO < ZnO < P₂O₅

Increasing Bond Length: 

N₂ < O₂ < F₂ < Cl₂

Increasing Size: 

Ca²⁺ < Cl⁻ < S²⁻

Increasing Acid Strength: 

HClO < HClO₂ < HClO₃ < HClO₄

Increasing Oxidation Number of Iodine: 

HI < I₂