Author: Dr. Vikas Jasrotia

2nd -Assignment Chemical Reactions and Equations      2nd – Assignment Chemical Reaction and Equation which is a subjective assignment ensure that readers will be able to get a proper idea about the types of subjective questions asked in exams. 16. Why should a magnesium ribbon be cleaned before burning in air? 17. Write the balanced chemical equation with state symbols for the following reactions? 18. A solution of a substance ‘X’ is used for whitewashing.                              (a) Name the substance ‘X’ and writes its formula.   …

Part – 1 SOME BASIC CONCEPTS OF CHEMISTRY Part – 1 Some Basic Concepts of Chemistry contain notes written in easy words and covers the chapter till SI units. Chemistry is the branch of science that deals with the properties, structure, and composition of matter. There are a large number of branches for Chemistry. Some of them are: Inorganic Chemistry                                 Organic Chemistry Physical Chemistry                                   Analytical Chemistry Polymer Chemistry                                   Biochemistry Medicinal Chemistry                                Industrial Chemistry Hydrochemistry                                        Electrochemistry Green Chemistry Matter: Matter is anything that occupies space, has a definite mass, and can be perceived by any of our sense organs. Based on…

Multiple Choice Questions Coordination Compounds Coordination compounds are molecules that possess one or multiple metal centers that is bound to ligands (atoms, ions, or molecules that donate electrons to the metal). These complexes can be neutral or charged. In order to test your knowledge solve Multiple Choice Questions Coordination Compounds. 1. Which of the following compounds formed by Cu2+ ions is most stable? (a) Cu2+ + 4NH3 → [Cu(NH3)4]2+; Log K = 11.6 (b) Cu2+ + 4CN– → [Cu(CN)4]2–; Log K = 27.3 (c) Cu2+ + 2 en → [Cu(en)2]2+; Log K = 15.4 (d)  Cu2+ + 4H2O → [Cu(H2O)4]2+; Log…

Answers Assignment – 1 Chemical Reactions and Equations All the subjective answers of the previous post are provided in the post Answers Assignment 1 – Chemical Reactions and Equations Ans 1. (i) Decomposition reaction             (ii) Double displacement reaction Ans 2. Silver does not evolve hydrogen on reacting with dil. H2SO4 as silver is less reactive metal than hydrogen. Ans 3. Diamond and graphite are the two allotropes of carbon but they do not evolve the same amount of heat on combustion because they differ in the arrangement of carbon atoms and also their shapes one different. Ans 4. The oxidizing agent supplies the oxygen…

Assignment – 1 Chemical Reactions and Equations                                                           This subjective Assignment is basically focused to check the reasoning and logical aptitude of the students. Assignment – 1 Chemical Reactions and Equations also focused to cover wide portion of chapter. Identify the type of chemical reaction                                                         …

The Effect of Oxidation-Reduction in Daily Life Corrosion Many metals are chemically active elements and get easily affected by substances like moisture, air, acids, etc and undergo Oxidation, Reduction in Daily Life. Corrosion – The process of slow conversion of metals into their undesirable compounds due to their reaction with oxygen, water, acids, gases etc. present in the atmosphere is called corrosion. Rusting of Iron: We know iron articles that are shiny when new and gets coated with a reddish-brown powder when left for some time this process is called Rusting of Iron. Chemically, Rust is a hydrated ferric oxide (Fe2O3.xH2O) Advantages of Corrosion:…

Redox Reaction, Oxidation and Reduction Reactions with exact equations This part of the types of chemical reaction of chapter Chemical Reactions and Equations involve the types Redox Reaction, Oxidation and Reduction Reactions with exact equations. v). Redox Reaction: A reaction in which reduction and oxidation takes place simultaneously. ZnO (s)    +    C (s)      →   Zn (s)    +   CO (g)            Zinc              Carbon      Zinc           Carbon                  Oxide                                                  Monoxide vi). Oxidation Reaction: Oxidation is the gain of oxygen. For example: 2…

Combination, Decomposition, Displacement And Double Displacement reactions Types of Chemical Reactions: i). Combination Reaction ii). Decomposition Reaction a). Thermal Decomposition b). Electrolytic Decomposition iii). Displacement Reaction OR Substitution reaction iv). Double Displacement Reaction                            a). Precipitation Reaction                            b). Neutralisation Reaction          v).  Redox Reaction vi). Oxidation Reaction vii). Reduction Reaction viii). Endothermic Reaction ix). Exothermic Reaction Explanation of the types of Chemical reactions i.e Combination, Decomposition, Displacement And Double Displacement reactions using examples: i). Combination Reaction: The reactions in which two or more substances combine to…

Chemistry Balancing Chemical Equations Practice Balanced Equation A balanced equation is one in which the number of atoms on the reactant and product sides is equal.  Or A number of atoms of an element on the reactant side = number of atoms of that element on the product side. The simple form of representation of a chemical reaction in words is known as a word equation. Magnesium    +     Oxygen    ———–> Magnesium Oxide       Representation of a chemical reaction with the help of chemical formula is called a chemical equation.    2Mg + O2→  2MgO             Chemistry Balancing Chemical…

Chemical Reactions And Equations Notes Physical Change  Change in physical properties.  Melting  Boiling Condensation Note- No change occurs in the identity of the substance Chemical Change Atoms in the reactants are rearranged to form one or more different substances. Old bonds are broken, new bonds are formed. Reactants lose their properties to form products of different properties.  Examples – Cooking of food Rusting of iron Heating of Lead nitrate Souring of milk Ripening of fruit. Rusting of iron is a chemical change because  A new substance iron oxide is formed. The change is permanent; the article has got a rust layer (which may only peal off).  There is an increase in mass when rust forms. An energy change…