Observe the Venn diagram given below.
Which of the following process could be 'X'?
Note:- X possess the properties of both the changes.
Observe the Venn diagram given below.
Which of the following process could be 'X'?
Note:- X possess the properties of both the changes.
The correct option is C Milk changing to curd
Chemical change:- It is a change in which the chemical composition of the substance changes because of the formation of a new substance.
Permanent change: It is a change in which the original state of substance cannot be reattained and it is a fixed change.
Milk changes to curd when a small of curd is added to the warm milk. In this change, a new substance is formed (Milk to curd) and hence this is a chemical change. The curd formed cannot be turned back to milk, and hence it is also a permanent change.
Melting of wax, conversion of water to steam:- In these, no new substances are formed and only the state of (wax, water) are changed (physical change). Moreover, this change is for a limited period of time and the original state of the substance can be reattained on cooling (temporary change).
Cutting of paper:- In this, no new substance is formed as the paper is cut into smaller pieces (physical change) and this change is fixed and it cannot be converted to its original state (permanent change).
Milk changing to curd
Chemical change:- It is a change in which the chemical composition of the substance changes because of the formation of a new substance.
Permanent change: It is a change in which the original state of substance cannot be reattained and it is a fixed change.
Milk changes to curd when a small of curd is added to the warm milk. In this change, a new substance is formed (Milk to curd) and hence this is a chemical change. The curd formed cannot be turned back to milk, and hence it is also a permanent change.
Melting of wax, conversion of water to steam:- In these, no new substances are formed and only the state of (wax, water) are changed (physical change). Moreover, this change is for a limited period of time and the original state of the substance can be reattained on cooling (temporary change).
Cutting of paper:- In this, no new substance is formed as the paper is cut into smaller pieces (physical change) and this change is fixed and it cannot be converted to its original state (permanent change).
