Author: Dr. Vikas Jasrotia

The Post True False Assignment Chemical Reactions and Equations contains subjective questions along with fill-ups and true-false type questions. This will help the students in improving the chapter knowledge. True False Assignment Chemical Reactions and Equations Q 36. Choose the correct about rancidity (i) Rancidity is a reduction process (ii) Rancidity is an oxidation process Q 37. When silver coloured metal (A) is added to dilute sulphuric acid, solution (B) is formed which is a colourless solution and a gas (c) is evolved which is the colourless name ‘A’, ‘B’ and ‘C’ and write the equation? Q 38. An ‘A’…

Some Basic Concepts of Chemistry Mole Concept Atoms and Molecules: The atom is the smallest particle of an element. Molecules are the smallest particle of a substance. A molecule has all the properties of that substance.  Types of molecules Based on the type of atoms, there are two types of molecules – Homonuclear molecule and Heteronuclear molecule. A molecule containing only one type of atom is called a Homonuclear molecule. e.g. H2, O2, N2, O3 (ozone), etc Heteronuclear molecules contain different types of atoms. E.g. CO2, H2O, C6H12O6, NH3, etc. Based on the no. of atoms there are three types…

Answers to assignment Chemical Reactions and Equations This Post involves the Answers to the assignment Chemical Reactions and Equations i.e assignment No. 2 in order to get the assignment click at the link given at end of the post. Ans 16. Magnesium ribbon is cleaned before burning to remove the protective layer of basic magnesium carbonate from the surface of the magnesium ribbon. Ans 17. Balance chemical reaction with state symbols are as follows- BaCl2(aq) + Na2SO4(aq)  →  BaSO4 (s) + 2NaCl (aq) NaOH (aq) + HCl (aq)   → NaCl (aq) + H2O    Ans 18. (i). The substance whose solution is water is used for…

Some Basic Concepts Chemistry Notes  Precision: It indicates how closely repeated measurements match each other. Accuracy: It indicates how closely a measurement matches the correct or expected value. Scientific Notation: Any number can be represented in the form where n is an exponent having positive or negative values and N can vary between 1 to 10. Expressing a number in form N × 10n, and N can vary between 1 to 10. Significant figures: These are meaningful digits that are known with certainty. The uncertainty is indicated by writing the certain digits and the last uncertain digit. Thus, if we…

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:…