Question

can you tell me the chemical changes and physical changes
1 )boiling water
2)freezing water
3)tearing a paper
4)cutting a paper
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Answer 1

Answer:

both 1)and 2) are physical change

both 3)and 4) are chemical change

Explanation:

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Answer 2

Answer:

let us first look at chemical reaction in the activity to a colourless solution of zinc sulphate znso4 is form an addition of zinc dust to the blue solution of copper sulphate cuso4 this chemical reaction can be returned a in brief as a so equation solution of copper sulphate + zinc dust it gives aqueous solution of zinc sulphate + copper this simple way of the present dating of chemical reaction in words is called a word equation over the equation can be returned in a further pencil condenser from by using chemical formula as for cuso4 + zn it gives their any so4 plus you that representation of a chemical reaction in a cause condenser form using chemical formula is it called as the chemical equation in the above equation copper sulphate cuso4 and zinc sadian are the reaction reactance they react with each other to form copper particles CU and a solution of the colourless zinc sulphate in racket znso4 as the product having totally different properties the ionic bond of the reaction reacted cuso4 breaks and the ayurvedic body is the product z areas of 4 is formed during the reaction writing a chemical equation when heat is to be given from outside to bring about the reaction it is indicated by the side triangle return above the arrow that indicated that I direction of the reaction for example the solution of its next line is formed on heating limestone is written as follows caco3 in racketeers gives on triangle CA