Question

characteristics of chemical reactions

Answer 1

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Here's is ur answer ^____^.

✔The characteristic of chemical reactions are..
In a chemical reaction the new substance are formed .

□ Evolution of gas.

□ For a participated .

□ change in colour.

□ change in temperature.

□ Change in state.


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Answer 2

The common features which are observed during the  chemical reaction are known as the characteristic of chemical reactions.

Explanation:

• Evolution of gas-  Chemical reaction in which gases are released like hydrogen gas which is  released when zinc reacts with dilute sulphuric   acid.

• Formation of Precipitate- Precipitate is the solid by product Produced during a reaction . When potassium iodide and lead nitrate reacts with each other,yellow colour lead iodide is precipitated.

• Change in color- Chemical reactions during which change of colour is observed.

• Change in temperature - Chemical reaction which undergo change in temperature like  when quick lime  reacts with water slaked lime is Produced  with  increase in temperature of the reaction.  

learn more about chemical reactions

Write the word equation for two chemical reactions with the help of materials given in the box Air, copper sulphate ,iron, vinegar, iron oxide ,carbon dioxide ,iron sulphate, copper , limewater ,water

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State the type of chemical reactions with chemical equations take place in the following

1) magnesium wire is burnt in air

2) electric current passed through water

3) ammonia and hydrogen chloride gases are mixed

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