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Showing posts with label Chemistry Formulas. Show all posts
Showing posts with label Chemistry Formulas. Show all posts

Sunday, 3 February 2019

Chemistry Quiz App

Chemistry Quiz App

Chemistry Quiz - Chemistry Notes Info

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This Chemistry Quiz App is developed to improve your chemistry skills. This app contain so many chemistry mcqs to make you perfect in your chemistry subject. This Chemistry MCQ App contain janral nolej   questions of chemistry and contain so many chemistry topics some of them are given below-
Nuclear Chemistry
Analytical Chemistry
Inorganic Chemistry
Physical Chemistry
Molarity vs Molality
Molarity vs Normality
Organic Chemistry
Mathematical Concepts Used in Chemistry
What is pH ?
States of Water H2O
Chemistry In Everyday Life
Periodic Table of Elements
Chemical Reactions and Equations
what is chemical and what is chemical reaction
Chemical Reactions and Chemical Formula
Important Chemistry Polymers with their Monomer
Types of Chemical Reactions
Polymer, Polymerization and Polymer Classification...
Polymer And Polymerization
Chemical Equations
Liquid State
Behavior Of Real Gases
Kinetic Molecular Theory Of Gases
Ideal Gas Equation, Equation Of State, Density
Gaseous State, Gas Laws, Thermodynamic Scale
Types of Forces in Chemistry
What Is Spectroscopy
Atomic number, Mass number, Isobars and Isotopes
Covalent Bond and Formal Charge (F.C.)
Fire and Safety
Discovery of protons & Discovery of Neutrons
Kossel Lewis Approach to Chemical Bonding and
Periodic Trends In Physical & Chemical Properties
Mendeleev Periodic Law, Modern Periodic Law
Aufbau Principle, Pauli Exclusion Principle
Quantum Mechanical Model of Atom
Dual Behaviour of Matter and Heisenberg’s Uncertainty Principal
Bohr’s model for hydrogen atom and Limitation
Photo electric effect
Wave nature of electromagnetic radiations
States Of Matter
Thomson model of atom and Rutherford’s nuclear model
Atomic Theory of matter, Cathode ray discharge
Pattern for Single Paper MCQ test- NET Chemistry
Laws of chemical combinations, Dalton’s Atomic Theory
Physical State, Classification Properties of Matter
Radioactivity, Penetrating Power, Tracer techniques
Atomic Number, Mass Number, Isotopes and Isobars
Bohr Bury Scheme & Valence Electrons and Valency
Project on Barcode
Periodic Properties of the Elements
Metals, Non-Metals and Metalloids
Classification of Elements and Periodicity in Elements
Aldol Reaction
Modern Periodic Law and Modern Periodic Table
Characteristics of covalent compounds
Mendeleev’s Periodic Table
Newland’s Law of Octaves and Lother Meyer Curves
How We Will Learn
Prout’s Hypothesis and Dobereiner’s Triads
SI Table & Prefixes for SI Units
Balancing of Chemical Reactions and Types of Chemical Reaction
Formation of Chemical Compound
Electrovalent Bond
Chemical Bonding
Chemical Bonding and Reactions
cGMP - Current Good Manufacturing Practices
Periodic Table of Elements
Bohr's Atomic Model
Rutherford Model of Atom
Thomson's Atomic Model
Dalton Atomic Theory
What is an atom?
what is coagulation
Atomic Structure
Discovery of Neutron
Discovery of Proton
Millikan's Oil Drop Experiment
Discovery of Electron
Baeyer Villiger Oxidation
Atomic Structure
Chemistry of Elements
Electromagnetic spectrum
Spectroscopy, Electromagnetic Radiations
What is Salt
Chemistry Project
Ultraviolet and Visible Spectroscopy
What is X rays?
Basics of Atoms and Moles
Activity series of metals in aqueous solutions
What is Organic Chemistry
Pure substances
Extraction of Essential Oil by Steam Distillation
Working with the Properties & Changes of Matter
Transition state theory or Activated complex theory
Transition Metals
What is Hyperconjugation
Explain the type of Bonding
What is Adsorption ?
Charge Transfer Transition
Spin Multiplicity Rule
Laporte Selection Rule
Bent Rule
what is molarity ?
Debye Huckel Theory
Project on Barcode
General principle and process
Surface chemistry
Chemical kinetics
Solid State
Chemical Bonding and Molecular Structure
Structure of Atom
Some Basic Concept of Chemistry
Symbol and Formula used in chemistry
Atoms and Moles
Some Notes & Terms to remember about Chemistry.... many more Download "Chemistry Quiz App" from playstore link

Sunday, 27 August 2017

Chemistry Formulas for Chemical Bonding

Chemistry Formulas for Chemical Bonding

   1.       Necessary condition for an ionic solid to be dissolved in water
                                Hydration Energy > Lattice Energy
   2.       Order of melting and boiling points of certain compounds
NaF > NaCl > NaBr > NaI;    MgO > CaO > BaO
3.       No Bond is 100% Ionic
4.       Force of attraction between two oppositely charged ions in vacuum (air) as per Coulombs Law
F = q1q2/r2
5.       Order of the Lattice Energy of some compounds
·         LiX > NaX > KX > RbX > CsX    (where X = F, Cl, Br, I)
·         MgO > CaO > SrO > BaO
·         MgCO3 > CaCO3 > SrCO3 > BaCO3
·         BaSO4 > SrSO4 > CaSO4 > MgSO4  
·         Mg(OH)2 > Ca(OH)2 > Sr(OH)2 > Ba(OH)2
·         Bivalent Ions-Bivalent Ions > Univalent Ions-Bivalent Ions or Bivalent Ions-Univalent Ions > Univalent Ions- Univalent Ions
6.       Example of some compounds which contains more than one type of bond
·         NaOH, KOH, Na2CO3  (Ionic Bond, Covalent Bond)
·         CO, NH3.BF3, [Co(NH3)3Cl3]  (Dative Bond, Covalent Bond)
·         NH4Cl, CuSO4, K4[Fe(CN)6], [Cu(NH3)4]SO4  (Dative Bond, Ionic Bond, Covalent Bond)
·         CuSO4.5H2O  (Hydrogen Bond, Dative Bond, Ionic Bond, Covalent Bond)
7.       Double bond or triple bond is always shorter than corresponding single bond
8.       As S-Orbital is smaller than P-Orbital so bond length decrease with increase in S-character
SP3  C-H  =  1.093 Å (as in Alkanes)
SP2  C-H  =  1.087 Å (as in Alkenes)
SP  C-H  =  1.057 Å (as in Alkynes)
9.       Bond length increases if size of bonded atom is increases with given atom
HI > HBr > HCl > HF
10.   Bond distance is directly proportional to Atomic size
11.   Order of bond strength (or bond energy) of different hydrogen halides
H-F > H-Cl > H-Br > H-I
12.   Bond energy is directly proportional to bond order
Triple Bond > Double Bond > Single Bond
13.   Formula of Dipole Moment
Dipole moment (µ) = Electronic Charge (e) x Distance (d)
14.   Unit of Dipole Moment
Debye (D)
1D = 1 x 10-18e.s.u. cm
SI unit of Dipole Moment is = Coulomb-Meter (C-m)
1D = 3.336 x 10-30 C-m
15.   Dipole Moment of some substances
Substance with Formula
Dipole Moment (D)

16.   Formula to calculate percentage ionic character of covalent bond
% Ionic Character = (Observed dipole moment x 100)/Dipole moment for 100% ionic bond
17.   Order of polarizing power of cations
Li+ > Na+ > K+ > Rb+ > Cs+
Be2+ > Mg2+ > Ca2+ > Sr2+ > Ba2+
Al3+ > Mg2+ > Na+
18.   Order of polarizing power of anions
N3- > O2- > F-
P3- > S2- > Cl-
19.   Chemistry Formula of Bond Order
Bond Order = [Nb-Na]/2
                Na = Number of electrons in antibonding molecular orbitals
                Nb = Number of electrons in bonding molecular orbitals
20.   Some molecules with their bond order, bond length and bond dissociation energy
Bond Order
Bond Length (pm)
Bond Dissociation Energy (kJ/mol)

21.   Bond Order in compounds which exhibits Resonance
Bond Order = (Total No. of bonds between two atoms)/(Total No. of resonating structures)

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