Standard 6
Chemistry.
Q1. Tearing of paper is said to be a change that cannot be reversed. What about paper recycling? Is it reversible or irreversible change comment on it.
Q2. How is frying of Puri different from rolling a Puri?
Give at least two points each.
Q3. A blacksmith heats a piece of iron till it becomes red hot and then beats it into a desired shape. What changes have taken place in iron on heating? What will happen when the blacksmith sprinkle some water on the red hot iron. Name the process also.
Answers
Ans:-1)The original form, shape, size, and texture of the paper are replaced with new shapes, sizes, and textures in this process. As a result, tearing of paper is an irreversible change, as the actual form of torn paper used in recycling is never restored.
Ans:-2)frying is cooking a puri in oil and rolling is with the help of roller we have to prepare a puri with the dough.it is before frying..
Ans:-3)A blacksmith first heats a piece of iron till it becomes red hot. It then becomes soft and can be beaten into desired shape. Iron when heated and beaten it forms some shape and again heated it regain initial iron. Thus, this change is a reversible change.
Answer:
plz.. like
Explanation:
ANS1-
The original form, shape, size, and texture of the paper are replaced with new shapes, sizes, and textures in this process. As a result, tearing of paper is an irreversible change, as the actual form of torn paper used in recycling is never restored.
ANS2-
frying is cooking a puri in oil and rolling is with the help of roller we have to prepare a puri with the dough.it is before frying.
ANS3-
A blacksmith first heats a piece of iron till it becomes red hot. It then becomes soft and can be beaten into desired shape. Iron when heated and beaten it forms some shape and again heated it regain initial iron. Thus, this change is a reversible change.