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What are the characterstics of chemical reactions?
Answers
Answer:
Evolution of gas. Some chemical reactions are characterised by the evolution of gas. ...
2)Formation of precipitate. Some chemical reactions are characterised by the formation of precipitate. ...
3)Change in colour. Some chemical reactions are characterised by change in colour. ..
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✰Question ✰
❍ What are the characteristics of chemical reactions?
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✰Answer ✰
⋄ The characteristics of chemical reactions are :-
❪i❫Formation of a precipitate :- some chemical reaction are accompanied by the formation of precipitate.
For example :- In the reaction between Lead Nitrate and Potassium chloride solution ,a yellow precipitate of lead iodide appear.
❪ii❫ Evaluation of the Gas :- some chemical reaction are component by evolution of gas .
For example :- In the reaction between zinc and dilute sulphuric acid or hydrochloric acid hydrogen gas is evolved.
❪iii❫ Change in colour:- some chemical reactions are accompanied by change in colour.
For example :- Rust is brown in colour whereas iron is greyish black in colour.
❪iv❫ Change in state:-some chemical reaction are accompanied by change in state.
For example :- solid wax (in the form of candle) burn to form water vapour and carbon dioxide which are gaseous.
❪v❫ Change in temperature :- some chemical reaction are accompanied by change in temperature i.e.,rise or fall of temperature.
For example :- when zinc react with sulphuric acid in a beaker or a flask it is found to be warm. This can be seen by touching the beaker or the flask.