Answer the following questions: Q1. Rolling of chapati is a reversible change whereas baking chapati is an irreversible change. Justify. Q2. Differentiate between physical and chemical change) Q3. Write in steps how a metal strip can be fixed on a wheel. Give an explanation.
Answers
Explanation:
question one answer is it is reversible change because we can again change it to its origanal form. question two answer is physical change is a change in which no new substance are formed whereas chemical change is a change in which new products are formed. question3 answer is first metal is taken and by heating it , the person changes it shape and fits it in the wheel, after that he puts that in cold water to make it cool which in turn make the iron strip fix more tightly into the wheel .
Answer:
Q.1. Rolling of chapati a reversible
change.
Baking of chapati is an irreversible
change
Q.2. physical change is a change where
no new substance is fomed .
And physical change is generally
reversible.
Chemical change is change where
one or more new substance is
formed.
chemical change is generally
irreversible.