Please solve these question please help
Dear Student,
A chemical change is defined as an irreversible arrangement of atoms to form a new substance.
During the cutting of paper, its physical form changes but its chemical properties remain unchanged. Hence it is a physical change.
During freezing of water the state of water changes from liquid to solid which can be reversed.
And during the dissolving of Copper sulphate, copper ions and sulphate ions dissociate into ions but their composition does not change. Upon evaporating water, crystals of copper sulphate and be restored.
While the burning of magnesium ribbon is a chemical change as a new substance magnesium oxide is formed as a product.
The correct option is C
Regards
A chemical change is defined as an irreversible arrangement of atoms to form a new substance.
During the cutting of paper, its physical form changes but its chemical properties remain unchanged. Hence it is a physical change.
During freezing of water the state of water changes from liquid to solid which can be reversed.
And during the dissolving of Copper sulphate, copper ions and sulphate ions dissociate into ions but their composition does not change. Upon evaporating water, crystals of copper sulphate and be restored.
While the burning of magnesium ribbon is a chemical change as a new substance magnesium oxide is formed as a product.
The correct option is C
Regards