JEE Mains Chemistry Formulas Overview

Chemistry Formulas

Essential equations for JEE Main Chemistry preparation

IIT JEE

Entrance exam for top technical institutes like IITs

NITs

National Institutes of Technology, prestigious technical institutes

Scoring Subject

Chemistry in JEE is easier and less prone to calculation errors

Rank Elevator

Chemistry plays a crucial role in determining JEE ranks

Physics & Mathematics

Subjects important for JEE but Chemistry determines rank

Chemistry Syllabus

Curriculum for Chemistry in JEE Main

Physical Chemistry

Branch of Chemistry focusing on macroscopic properties

Stoichiometry

Study of quantitative relationships in chemical reactions

Gaseous State

State of matter where particles are far apart and move freely

Chemical Equilibrium

State where forward and backward reaction rates are equal

Ionic Equilibrium

Equilibrium involving ions in a solution

Thermal Chemistry

Study of heat changes in chemical reactions

Thermodynamics

Branch of physical science dealing with energy

Electrochemistry

Study of chemical processes involving electric current

Colligative Properties

Properties of solutions dependent on solute concentration

Molarity

Concentration of a solution in moles of solute per liter of solution

Molality

Concentration of a solution in moles of solute per kilogram of solvent

Mole Fraction

Ratio of moles of a component to the total moles in a mixture

Oxidation Number

Charge an atom would have if electrons were transferred completely

Equivalent Weight

Weight of a substance that can combine with or displace 1.008 g of hydrogen

Boyle's Law

At constant temperature, the volume of a gas is inversely proportional to its pressure

Charles Law

At constant pressure, the volume of a gas is directly proportional to its temperature

Ostwald Dilution Law

Ka=C2/(1-α), where α is the Dissociation Constant

Dissociation Constant

The constant denoted by α in the Ostwald Dilution Law equation

Ka

Dissociation constant

pH

Negative logarithm of the hydrogen ion concentration

pOH

Negative logarithm of the hydroxide ion concentration

pKa

Negative logarithm of the acid dissociation constant

pKb

Negative logarithm of the base dissociation constant

Kirchhoff's Equation (Constant Pressure)

ΔH°=ΣH°(products) - ΣH°(reactants) + Cp(T2 - T1)

Kirchhoff's Equation (Constant Volume)

ΔE°=ΣE°(products) - ΣE°(reactants) + Cv(T2 - T1)

First Law of Thermodynamics

ΔU=q+w

Law of Equipartition of Energy (Ideal Gas)

ΔU=(f/2)nRT

Molar Heat Capacity (Constant Volume)

Cv=R

Molar Heat Capacity (Constant Pressure)

Cp=R

Second Law of Thermodynamics

ΔSuniverse=ΔSsystem+ΔSsurroundings>0

Entropy

ΔSsystem=∫(A to B)dqrev/T

Nernst Equation

E=E°- (RT/nF) ln(Q)

Faraday's Law of Electrolysis

W=ZIt

Conductance

Reciprocal of Resistance

Conductivity

Reciprocal of Resistivity

Equivalent Conductance

E=1000K/Normality

Molar Conductance

m=1000K/Molarity

Raoult's Law

P=P°X

Elevation in Boiling Point

ΔTb=iKbm

Osmotic Pressure

π=gh

Van't Hoff Formula

ΔTb=iKbm