CHEMISTRY NOTES CLASS - Xth

CHEMISTRY CLASS - XTH ALL CHAPTERS NOTES

➡️Chapter - 01 

I) Chemical Reactions and Equations click below 👇


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EXPERIMENTAL VERIFICATION OF OHM'S LAW

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  EXPERIMENTAL VERIFICATION OF OHM'S LAW OBJECTIVE:-  Verification of ohm's law  EQUIPMENT REQUIRED :- A battery, an ammeter, voltmeter, rheostat, plug key, coil, of unknown substance, connecting wire etc.  THEORY :- Ohm's law deal with the relationship between voltage (p.d) and current in an ideal conductor.  This relationship states that -  The p. d.(voltage) across an ideal conductor is directly proportional the current through it.  Ohm's law given by  V=IR Where,  V= potential difference  I= current  R= constant (Resistance)  CIRCUIT DIAGRAM :-  PROCEDURE:- 1. The circuit is connected as per the circuit diagram. 2. The plug key is inserted and the rheostat is adjusted so that a definite amount of current (I) flows in the circuit. This value of current is recorded. 3. As the current flows through the unknown resistance a p. d. is developed which is read from voltmeter. 4. The procedure is again adjusted to a different v...
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Type of chemical reactions

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  Type of chemical reactions 1.) Combination Reaction :- When two or more substances (elements or compounds) combine to form a single product. Whose properties are entirely different from the original substance.  Ex -                 A  +   B    ->    C i. When coal burns in presence of air it produce carbon dioxide gas .  C (g) + O2(g) -> CO2 (g)  ii. When hydrogen combines with oxygen it forms water.  H2 (g) + O2(g) -> H2O(l)  Note :- In this reaction heat is produced.  ➡️Exothermic reactions :- The reactions, in which heat is generated in course of formation of product, are Exothermic reaction.  Ex-  a.) CH4 (g) + 2O2(g)  -> CO2 (g) +2H2O (g) +        energy  2) Decomposition Reactions :-  In this reaction, a substance is broken down into two or more new substances whose properties are different from the original s...
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CHEMISTRY CHAPTER - 01

  CHEMICAL REACTIONS AND EQUATIONS Course Content I) Introduction II) Types of changes III) Chemical Reactions IV) Chemical Equations V) Different types of chemical reactions VI) Oxidation and reduction reaction VII) Oxidising and reducing agents VIII) Balancing of chemical equations IX) Corrosion and Rusting (prevention of rusting ) X) Rancidity >Write the difference between physical and chemical change. 1)Physical change :- ➡️It is a temporary change.  ➡️It affects only physical properties i. e shape, size etc.  ➡️It involves very little to absorption* of energy.  ➡️For example - freezing of water, melting of wax, boiling of water etc.  ➡️It do not involve the production of energy.  ➡️No, new substance is formed.  ➡️It is easily reversible i. e original substance can be reformed.  Chemical changes :- ➡️It is a permanent change.  ➡️It has both physical as well as chemical properties of the substance including its composition.  ➡️In t...
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