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Determination of charge to mass ratio (e/m) and charge on electron (R A Millikon's experiment)2023-09-20
Atomic structure: Discharge tube, discovery of cathode rays and properties of cathode rays2023-09-19
Water born diseases 2023-09-18
Watter pollution, Household waste, industrial waste, raw water treatment and sewage water treatment 2023-09-17
Water as solvent, soft and hard water, types of hardness and methods of removing hardness 2023-09-16
Environmental Chemistry II: Water, Occurrence, importance, properties and composition 2023-09-15
Air pollutants and sources of air pollutants2023-09-14
Environmental Chemistry: Atmosphere, its composition and layers 2023-09-13
Vitamins: Definition, Examples, Types, Importance, Sources and Uses2023-09-12
Nucleic acids: Definition, Components, Kinds, DNA and RNA2023-09-11
Lipids: Definition, Examples, Sources and Uses2023-09-10
Proteins: Definition, Functions Sources and Uses2023-09-09
Biochemistry: Carbohydrates, Classification, Sources and Uses2023-09-08
Functional group: Definition and examples 2023-09-07
Classification of organic compounds, alkane and alkyl radical2023-09-06
Organic Chemistry:Sources and uses of organic Compounds 2023-09-05
Structural formulas and condensed Structural formula of organic compounds 2023-09-04
Organic Chemistry: Organic compounds and their general characteristics 2023-09-03
Salts, method of making salts and uses2023-09-02
PH of solution and ph scale and measurement of PH2023-09-01
Self ionization of water or auto-ionization2023-08-31
Acids, Bases and Salts: Concepts of acids and Bases2023-08-30
Chemical Industries: Solved Exercise and Think-Tank 2023-08-29
Environmental Chemistry II: Water: Solved Exercise and Think-Tank 2023-08-28
Environmental Chemistry: Solved Exercise and Think-Tank 2023-08-27
Biochemistry: Solved Exercise and Think-Tank 2023-08-26
Hydrocarbons: Solved Exercise and Think-Tank 2023-08-25
Organic Chemistry: Solved Exercise and Think-Tank 2023-08-24
Acids, Bases and Salts:Solved Exercise and Think-Tank 2023-08-23
Chemical Equilibrium: Solved Exercise and Think Tank2023-08-22
Chemical Reactivity: Solved Exercise and Think-Tank 2023-08-21
Electrochemistry: Solved Exercise and Think-Tank 2023-08-20
Solutions: Solved Excercise and Think Tank2023-08-19
Physical states of matter: Solved exercise and Think-Tank 2023-08-18
Structure of Molecules: solved exercise and Think-Tank2023-08-17
Periodic table and Periodicity of Properties 2023-08-16
Structure of Atoms: solved exercise and Think Tank2023-08-15
Fundamental of Chemistry: Solved exercise and think tank2023-08-14
Intermolecular forces, their importance, nature of bonding and their properties 2023-08-13
Covalent bonds:single covalent bond, double Covalent bond and tripple covelent bond and example 2023-08-12
Non metals, electronegative character and comparison of reactivity of the halogens 2023-08-11
Important alkali and alkaline earth metals, inertness of noble metals, Importance of silver, gold and platinum 2023-08-10
Metals, electropositive character or Metallic character and reactivity2023-08-09
Solid state:Typical properties, Types of Solids, melting and freezing point and Sublimation2023-08-08
Liquid state, Typical properties, evaporation vapour pressure and boiling points 2023-08-07
Laws related to gases: Boyl's law and Charles's law 2023-08-06
Gases, typical properties, effect of change in temperature and pressure on volume of gas 2023-08-05
Isotopes: Definition, comparson and their uses2023-08-04
Structure of atom: Rutherford atomic model anf Bohr atomic theory 2023-08-03
Solutions, types of solutions and concentration terms 2023-08-02
Group VIIA elements (Halogens) and their physical and chemical properties 2023-08-01
Group VIA elements and their physical and chemical properties2023-07-31
Alkaline earth metals and their physical and chemical properties 2023-07-30
Chemistry of vanadium, chromium, manganese, iron, copper and their compounds2023-07-29FBISE Chemistry II, Transition Element d and f block elements
Co-ordination compounds, Nomenclature, geometries and colours2023-07-28coordination compounds and their nomenclature, FBISE Chemistry II, Transition Element d and f block elements
Transition elements or d and f block elements 2023-07-27FBISE Chemistry II, Transition Element d and f block elements
S and P block Elements2023-07-25FBISE Chemistry II, s and p-Block Elements
Chemical Bonding2023-05-28
Ionic compound reactions, physical properties of ionic compounds and geometry of CO2, CS2 and SO22023-05-28
Chapter 4(2)2023-05-28Structure of molecule Grade 9 students
Alkyl halides2022-12-25Alkyl halides (second year)
CHAPTER # 15 ORGANIC COMPOUNDS2022-12-07Chapter 15, Organic Compounds, Second year
First year chemistry: Chapter 4 Gases Short answer questions2022-02-25Gases (Federal)
Class first year MCQs on Thermochemistry 2021-08-07Class first year MCQs on Thermochemistry
Class 9 Electrochemistry MCQs and Answers with explanation2021-08-05Class 9 Electrochemistry MCQs
Class First year MCQs on Electrochemistry2021-08-04Electrochemistry MCQs
Solutions and Colloids: MCQs and Answers with explanation2021-07-30Chemical Equilibrium MCQs, Chemical Equilibrium MCQs Solid MCQs, Chemical Kinetics: MCQs, Chemistry First year (Federal), Solutions and Colloids: MCQs
Chemical Reactivity: MCQs and Answers with explanation2021-07-29Chemical Reactivity: MCQs, Fundamentals of Chemistry: MCQS
Chemical Kinetics: MCQs and Answers with explanation2021-07-29Bases and Salts: MCQs, Chemical Equilibrium MCQs Solid MCQs, Chemical Kinetics: MCQs acids, Gases MCQs, Liquids MCQs
Acids, Bases and Salts: MCQs and Answers with explanation2021-07-28Acids, Bases and Salts: MCQs, Chemical Equilibrium MCQs, Chemistry First year (Federal), Gases MCQs, Liquids MCQs, Solid MCQs, Theories of covalent bonding and Shapes of molecules MCQs
Acids, Base and Salts: Short Questions and Answer2021-07-27Acids, Base and Salts: Short Questions and Answer
Chemical Equilibrium MCQs and Answers with explanation2021-07-26Chemical Equilibrium MCQs Solid MCQs, Liquids MCQs, Theories of covalent bonding and Shapes of molecules MCQs
FBISE Chemistry XII (2018-Second Group)2021-07-24FBISE Chemistry XII (2018-Second Group)
FBISE Chemistry XII (2018-First Group)2021-07-24FBISE Chemistry XII (2018-First Group)
FBISE Chem-Supp(2019 ) MCQs and Answers with explanation2021-07-23
FBISE Paper 2019: MCQs and answers with explanation2021-07-23FBISE Paper 2019 (XII): MCQs and answers with explanation
Analytical Chemistry MCQs and Answers with explanation2021-07-20Analytical Chemistry MCQs, Test your Chemistry
Environmental Chemistry MCQs and Answers with explanation2021-07-19Environmental Chemistry MCQs, Test your Chemistry
Industrial chemistry MCQs and Answers with explanation2021-07-19Industrial chemistry MCQs, Test your Chemistry
Biochemistry MCQs and Answers with explanation2021-07-18Biochemistry, Test your Chemistry
Carboxylic acids MCQs and Answers with explanation2021-07-18carboxylic acid, Test your Chemistry
Alkyl halide: Short questions and answer2021-07-17Alkyl Halides, FSc Federal
FBISE Paper (2016 Ann.) MCQs and Answers with explanation2021-07-16FBISE Paper (2016 Ann.) MCQs and Answers with explanation, FBISE Past papers, Solution FBISE Chemistry, Test your Chemistry
FBISE Paper (2017 SUPP.) MCQs and Answers with explanation2021-07-16FBISE Paper (2017 SUPP.) MCQs and Answers with explanation, Solution FBISE Chemistry, Test your Chemistry
FBISE Paper (2018 Supplementary) MCQs and Answers with explanation2021-07-16FBISE Paper (2018 Supplementary) MCQs and Answers with explanation, Solution FBISE Chemistry, Test your Chemistry
FBISE Paper (2017-19) MCQs and Answers: Online Test2021-07-15Online Chemistry, Test your Chemistry
FBISE Paper (2017) MCQs and Answers with explanation2021-07-15FBISE Paper (2017) MCQs and Answers, Solution FBISE Chemistry, Test your Chemistry
FBISE Paper (2018) MCQs and Answers with explanation2021-07-15Solution FBISE Chemistry, Test your Chemistry
FBISE Paper (2019) MCQs and Answers with explanation2021-07-14Solution FBISE Chemistry, Test your Chemistry
Fundamentals of Chemistry: Online Test2021-07-13Fundamentals of Chemistry, Online Chemistry, Test your Chemistry
Fundamental of Chemistry: Multiple choice questions (MCQs) and answer with explanation2021-07-13Fundamentals of Chemistry: MCQS, Online Chemistry, Test your Chemistry
Solids: MCQs Online 2021-07-12Chemical Equilibrium MCQs Solid MCQs, Liquids MCQs, Solids, Test your Chemistry, Theories of covalent bonding and Shapes of molecules MCQs
Liquid: Online Test2021-07-12liquids, Online Chemistry, Test your Chemistry
Solids: MCQs, FAQs and Answers with Explanation2021-07-12Chemical Equilibrium MCQs Solid MCQs, Chemistry First year (Federal), Liquids MCQs, MCQs with Detailed Answers, Solids, Test your Chemistry, Theories of covalent bonding and Shapes of molecules MCQs
Liquids:MCQs & Answers with Explanation 2021-07-12Chemical Equilibrium MCQs Solid MCQs, liquids, Liquids MCQs, MCQs and Answers, Test your Chemistry, Theories of covalent bonding and Shapes of molecules MCQs
Gases: Online Test, FAQs about Gases, Quiz on Gases2021-07-10Gases (Federal), Gases online Quiz, Test your Chemistry
Gases: MCQs and Answers with explanation2021-07-10Chemical Equilibrium MCQs Solid MCQs, Gases (Federal), Gases MCQs, Liquids MCQs, Test your Chemistry
Electrochemistry: Galvanic Cells (Daniel Cells), Definition, Construction, Working and Cell Reactions2021-07-09Electrochemistry (Grade 10)
Chemical Equilibrium: Law of mass action and equilibrium constant expression, explanation and derivation2021-07-08Chemical Equilibrium Grade 10
Electrochemical cells, Electrochemical cells: Definition, construction, working and applications2021-07-07Electrochemistry (Grade 10)
Aldehydes and Ketones: Online Test2021-07-07Aldehydes and Ketones, Test your Chemistry
Aldehydes and Ketones: FAQs, MCOs & Answer with explanation2021-07-07Aldehydes and Ketones, Test your Chemistry
Chemical Industries: Online Quiz2021-07-06Chemical Industries, Online Chemistry, Test your Chemistry
Chemical Industries: MCQs with answer and explanation2021-07-06Chemical Industries
Theories of Covalent Bonding and Shapes of Molecules: Short questions and answers2021-07-06Theories of Covalent Bonding and Shapes of Molecules
Aldehydes and Ketones: Short question & answer, mechanism of nucleophilic addition2021-07-05Aldehydes and Ketones, chemistry Grade 12 (Federal Board)
Theories of Covalent Bonding and Shapes of molecules: Online Quiz2021-07-04Theories of Covalent Bonding and Shapes of Molecules
Theories of Covalent Bonding and Shapes of Molecules: MCQs2021-07-01Chemistry First year (Federal), Test your Chemistry, Theories of Covalent Bonding and Shapes of Molecules
How to determining the oxidation state of an element in a compound?2021-06-19Chemical Industries
Chemical Industries: MCQs + Answer Key2021-06-16
Chemical Industries: Urea, Raw materials, Manufacturing2021-06-15
Atomic Structure : MCQs + Key Answer2021-06-15
Electrochemistry: Oxidation, Reduction, Oxidation state, Rule for Assigning Oxidation State 2021-06-15Electrochemistry (Grade 10)
s and p-Block Elements (MCQs + Answer Key)2021-06-14s and p-Block Elements
Solvay Process: Definition, Explanation, Chemical reactions & Advantages2021-06-14Chemical Industries
Atomic Structure: Definition, Short Question & Answer2021-06-14Atomic Structure (Federal)
Stoichiometry (MCQs + Answer Key)2021-06-10Stoichiometry, Test your Chemistry
Self Assesment : Imporatant ores of Iron, copper, Zince and Mercury, and metallergical operations2021-01-14Chemical Industries
Electro-refining of Copper2021-01-14Chemical Industries
Multiple Choice Questions: Chemical Equilibrium2021-01-14Chemical Equailibrium, Test your Chemistry
Extraction of Metals: Roasting, Smelting and Bessemerization2021-01-11Chemical Industries
Cyclone Separation and Floatation Process2021-01-10Chemical Industries
Concentration of minerals: Magnetic separation2021-01-09Chemical Industries
Metallurgy, minerals, ores, and Gangue: Definition and example2021-01-08Chemical Industries
Stoichiometry/Solutions/Laboratory: Multiple Choice Questions and Answer 2021-01-07Stoichiometry/Solutions/Laboratory, Test your Chemistry
Environmental Chemistry II: Water : MCQs + Answer Key2021-01-06Environmental chemistry II: water
Water Born Disease2021-01-02Environmental chemistry II: water
Removal of Permanent Hardness in Water2020-12-30Environmental chemistry II: water
Methods to Remove of Temporary Hardness of Water2020-12-30Environmental chemistry II: water
Mole-particles calculations 2020-12-29Fundamentals of Chemistry
Multiple Choice Question2020-12-28Biochemistry, Test your Chemistry
Soft water and Hard water: Definition, example, How hard water is formed2020-12-28Environmental chemistry II: water
Mole-Particles Calculations2020-12-27Fundamentals of Chemistry
Molecular mass calculations, Mole-mass calculations2020-12-27Fundamentals of Chemistry
Exercise solution2020-12-26Environmental Chemistry: Atmosphere ( for Grade 10 Students)
Exercise solution: Sources of acid rains, Human activities 2020-12-26
Ozone depletion and ozone hole: Definition, explanation, chemical reactions, 2020-12-23Environmental Chemistry: Atmosphere ( for Grade 10 Students)
Acidic Rain: Definition, formation and effects2020-12-23Environmental Chemistry: Atmosphere ( for Grade 10 Students)
Global warming: Definition, explanation and effects2020-12-22Environmental Chemistry: Atmosphere ( for Grade 10 Students)
Geometries of H2O, NH3, CH4, CCl4, and SO32020-12-22Chemical Bonding
Electron Afinity: Definition, example, trend in periodic table2020-12-20Periodic Table and Periodicity of Elements
Ionization energy: Definition, units, examples trend in periodic table2020-12-20Periodic Table and Periodicity of Elements
Atomic size: Definition, examples, Trend in periodic table 2020-12-19Periodic Table and Periodicity of Elements
Chemical Bonding: Atomic size, anionic size, ionization energy,2020-12-19Chemical Bonding, Chemical Bonding :First year Punjab
Chemical Bonding : Short questions2020-12-19Chemical Bonding, Chemical Bonding :First year Punjab
Shielding Effect (Grade 9 Students) and its trend in Periodic Table.2020-12-17Periodic Table and Periodicity of Elements
Electronic configuration and position of elements2020-12-17Periodic Table and Periodicity of Elements
Carbohydrates(For Grade 10 Students)2020-12-14Carbohydrates(For Grade 10 Students)
Carbohydrates (For Grade 10 Students)2020-12-14Carbohydrates (For Grade 10 Students)
Vitamins 2020-12-14Vitamins
Nucleic acid (Review exercise for Grade 10 Students)2020-12-13Nucleic acid (for Grade 10 Students)
Nucleic acids 2020-12-13Nucleic acid (for Grade 10 Students)
Fundamentals of chemistry: Basic Definitions (for Grade - 9 students),2020-12-12Fundamentals of Chemistry
Calculation of formula mass of Potassium Chlorate, baking soda, Ammonium nitrate and urea 2020-12-12Fundamentals of Chemistry
Basic Definition: How to determine emperical formula, molecular formula, molecular mass, formula mass (Part 3)2020-12-12Fundamentals of Chemistry
Basic Definitions: Atomic number, Mass number, Relative atomic mass, Atomic mass unit , Empirical formula and Molecular formula (Part 2)2020-12-11Fundamentals of Chemistry
Basic Definitions| Matter, Substance, Element, Compound. Mixture, Homogeneous mixture and Heterogeneous mixture Examples (for Grade - 9 students)2020-12-11Fundamentals of Chemistry
Fundamental Principles of the Organic Chemistry 2020-12-10Fundamental Principless of the Organic Chemistry
Hydrocarbons: Short Questions and Answers2020-12-10Solved Excercise
Gases2020-12-09Gases
Hydrocarbons(Ethyne For Grade 10 students)2020-12-08Alkynes, Physical and Chemical properties of Alkynes
Hydrocarbons (Akynes for Grade 10 students)2020-12-08Alkynes, General method of preparation of Alkynes
Hydrocarbons (Alkenes Grade 10 students)2020-12-04Alkenes, Physical and Chemical Properties of Alkenes
Hydrocarbons (Alkene Grad 10 Student)2020-12-04Alkenes, General methods of Preparation of Alkenes
Properties of alkanes (Grade 10 Students)2020-12-02Alkanes, Physical and Chemical Properties of Alkanes
Hydrocarbons (For Grade 10 Students)2020-12-02Alkanes, General methods of Preparation of Alkanes, Hydrocarbons
Solution2020-12-02
Chemical Bonding2020-11-29Chemical Bonding
Chemical Bonding2020-11-29Chemical Bonding, Hybrization
Chemical Bonding 2020-11-29Chemical Bonding, Hybrization
Chemical Equilibrium 2020-11-26Chemical Equilibrium
Structure of Molecule, Chemical bonds, Ionic bond and examples 2020-11-26Ionic bond formation in NaCl, MgF2
Chemical Equilibrium2020-11-25Chemical Equilibrium
Chemical Equilibrium2020-11-17Chemical Equilibrium
Thermochemistry2020-11-16Thermochemistry
Thermochemistry2020-11-12Thermochemistry
Thermochemistry2020-11-10Thermochemistry
Thermochemistry2020-11-10Thermochemistry
Thermochemistry2020-11-10Thermochemistry
Thermochemistry2020-11-10Thermochemistry
Thermochemistry 2020-11-10Thermochemistry
Thermochemistry 2020-11-10Thermochemistry
Chemical Bonding 2020-10-24Chemical Bonding
Chemical Bonding 2020-10-24Chemical Bonding
Chemical Bondings2020-10-12Chemical Bonding
Heisenberg principle2020-10-11Atomic Structure
Atomic structure2020-10-11Atomic Structure
Atomic Structure2020-09-29Atomic Structure
Atomic Structure2020-09-29Atomic Structure
Stoichiometry, Limiting-reactant-excess-reactant, Different mass -same molecules, limiting-reactant-theoretical-yield-actual-yield-molar-volume2020-09-20Chemistry First year (Federal), Stoichiometry
Test Your Chemistry 2020-09-19Test your Chemistry
Biochemistry|Definition, Short Questions &Answers 2020-04-10
Alcohols, Phenols and Ethers2020-04-07Alcohols
Alkyl Halides and Amines2020-04-04Alkyl Halides
Hydrocarbons: Short questions and answers part (2/2)2020-03-31Hydrocarbons (Grade-12 Students)
Hydrocarbons: Short questions and answers (Part 1/2)2020-03-27Hydrocarbons (Grade-12 Students)
2020-03-27
Organic Compounds2020-03-26Organic Compounds
d-and f-Block Elements: Short questions and answers2020-03-24d- and f-Block Elements
Chemistry I2 (Federal)2020-03-24
s- and p-Block Elements: Definition, short questions and answers2020-03-08s- and p-Block Elements
Chemistry XII MCQs2020-02-27
Chemistry IX Chapter 7 MCQs 2020-01-29
Chemistry IX Chapter 8 MCQs2020-01-29
Chemistry IX Chapter 6 MCQs2020-01-29
Chemistry IX Chapter 52020-01-28
Chemistry IX Chapter 4 MCQs 2020-01-27
Chemistry IX Chapter 32020-01-27
Chemistry IX Chapter 22020-01-27
Multiple Choice Questions: Fundamentals of chemistry2020-01-26Fundamentals of Chemistry, Test your Chemistry
Chemical Bonding 2019-10-23Chemical Bonding, Chemical Bonding :First year Punjab
Chemical Bonding2019-10-22Chemical Bonding, Chemical Bonding :First year Punjab
Chemical Bonding 2019-10-21Chemical Bonding, Chemical Bonding :First year Punjab
Chemical Bonding: Definition, examples2019-10-21Chemical Bonding, Chemical Bonding :First year Punjab
Chapter 6 Chem XII2019-10-20
Chemistry XII chapter 52019-10-20
Chapter 4 Chemistry XII2019-10-19
Chapter 3 chemistry II2019-10-19
Chapter 3 chemistry XII 2019-10-19
Chemistry XII chapter 22019-10-19
Atomic orbital: Discriptive queston2019-10-18
de-Broglie equation2019-10-18
Hydrogen spectrum short questions2019-10-18
Short question atomic structure2019-10-18
Bohr theory short questions2019-10-18
Sub atomic particles short questions2019-10-18
Chemistry Rutherford experiment2019-10-18
Discovery of neutron and its properties2019-10-18
J J Thomson and Millikan experiment2019-10-18
Chemistry XI Chapter 42019-10-16
Chemistry XI Chapter 4 Descriptive Questions2019-10-14
Chemistry XI Chapter 4 Descriptive Questions2019-10-14
Chemistry XI Chapter 4 2019-10-14
Chemistry XI Chapter 42019-10-14
Chemistry XII Chapter2019-10-14
Chemistry XII chapter 12019-10-13
Chapter 1 Short Questions 2019-10-13
Gases2019-10-13Chemistry First Year (Punjab Board), Gases
Gases2019-10-12Chemistry First Year (Punjab Board), Gases
Liquids and Solids2019-10-11Liquids and Solids
Gases2019-10-11Chemistry First Year (Punjab Board), Gases
Experimental Techniques in Chemistry2019-10-11Experimental Techniques in Chemistry
Chemistry XII (Punjab)2019-10-11
Chemistry XI (Punjab)2019-10-11Chemistry First Year (Punjab Board)
Periodic Table and Periodicity of Elements (Grade 9 Students)2019-10-10Periodic Table and Periodicity of Elements
Class 11 chemistry notes for FBISE2019-10-10Chemistry First year (Federal)
Class 10 Chemistry Notes for Federal Board2019-10-10Class 10 Chemistry Notes for Federal Board
Class 9 Chemistry Notes for Federal Board2019-10-10Class 9 Chemistry Notes for Federal Board
Chemistry2019-10-10

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Theories of Covalent Bonding and Shapes of Molecules: MCQs

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CHAPTER # 15 ORGANIC COMPOUNDS

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Class 9 Electrochemistry MCQs and Answers with explanation

1. In which of the following changes, the nitrogen atom is reduced? a) N 2 to NO b) N 2 to NO 2 c) N 2 to NH 3 d) N 2 to HNO 3 ... Answer is b) Explanation: Oxidation number of an elemnet in free state is zero. So Oxidation No. of N 2 = 0 Calculate oxidation No. of nitrogen in each compound. Option a) Let, oxidation No. of N in NO is X. Sum of oxidation numbers of all atoms present in a neutral compound is zero. Oxidation No. of N + (Oxidation No. of O ) = 0 X-2 = 0 X = +2 X = +2 Oxidation No. of N in NO 2 is +2 Option b) Let, oxidation state of N in NO 2 is X. Sum of oxidation numbers of all atoms present in a neutral compound is zero. Oxidation No. of N + 2(Oxidation No. of O ) = 0 X + 2(-2) = 0 X -4 = 0 X = +4 Oxidation No. of N in NO 2 is +4 Option c) Let, oxidation state of N in NH 3 is X. Sum of oxidation numbers of all atoms present in a neutral compound is zero. Oxidation No. of N + 3(Oxidation No. of H )...
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