Class 10 Chemistry Chapter 1 | Chemical Reaction and It's Characteristics

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Whenever a chemical reaction takes place, some changes are observed. The easily observable changes that take place in a chemical reaction are called the characteristics of a chemical reaction. These changes help us to determine whether a chemical reaction has taken place or not. Some important characteristics of a chemical reaction are- Change in state, Change in colour, Evolution of a gas, Change in temperature and Formation of precipitate

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1:25:24 Zn+HCl =ZnCl2 +H2 Observations 1.Evolution in gas 2.Change in Temperature

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That's exactly right! Zinc and hydrochloric acid react to form zinc chloride and hydrogen gas. The production of a gas is usually accompanied by a temperature change, so that's another observation you made that's consistent with the reaction.

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1:01:32 Magnesium Oxygen (Reactant) =Magnesium oxide (Product)

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Thanks for watching our educational videos and for your comment! We're glad you found our videos helpful in understanding the reactant magnesium oxide.

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During a chemical reaction atoms of one element don't change into atoms of another elements. Atoms don't come in the reaction mixture from elsewhere. A rearrangement of atoms takes place to produce new substances.

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Whenever a new substance is formed with different chemical properties is called chemical reactions...

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The process in which new substance with new property are formed . From one or more substance is called Chemical Reaction.....

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Whenever a chemical change occur chemical reaction has taken place❤❤

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Can we say that there is change in state in the reaction between lead nitrate and potassium iodine because here the precipitate formed is in solid state therefore can we take this example as a change of state???

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to remove the layer of magnesium oxide.

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1:20:19 Pb(NO3)2 +KI =KNo3 +PbI2

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Nice maam

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During a chemical reactions atom of the elements r rearrangement 😊

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Mam,if there are 2 different elements and chemical reaction occurs between them,then the new substance has no element in fact it has compound.

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You are absolutely right! When two elements react and form a new substance, that substance is a compound made of those two elements.

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@@MagnetBrainsEducation from above can we conclude that the element of substance before chemical reaction will change in substance after the chemical reaction (compound)

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Mam then rusting of copper becomes greenish. Then this chemical change can be come in “ change in colour ?”

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Answer

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Yes

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When chemical reactions occur new substance us formed

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Mam please explain me precipetate again I haven't understood that

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Mam what is precipitate

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