Question

identify the physical and chemical change from the following

Answer 1

(i) Burning of magnesium in air : Chemical change
(ii) Tarnishing of silver spoon : Chemical change
(iii) Sublimation of iodine : Physical change
(iv) Electrolysis of water to form hydrogen and oxygen is also a chemical change.

HOPE YOU ARE SATISFIED MATE....!!!!!
PLEAS MARK AS BRAINLIEST.........!!!!!!!
PEACE OUT !!!✌️✌️✌️✌️✌️

Answer 2

In a physical change, the substance's nature, the particles that make up it, and the quantity of those particles all remain the same, but Chemical changes result in new compounds with different characteristics from the original ones, as well as new particles and may be altered particle numbers.

Burning of magnesium in the air:

• Magnesium ribbon burning in the air is a chemical change since it is an irreversible alteration and the ribbon cannot be unburned after it has burned.
• MgO, a new product with novel qualities, is created.
• Magnesium's chemical makeup varies.

Tarnishing of silver spoon:

• Silver items rapidly deteriorate in appearance and color when exposed to airborne contaminants.
• The term "tarnishing" refers to this discoloration of silver.
• It happens when silver and chemicals containing sulfur engage in a chemical process known as an oxidation reaction.

Sublimation of iodine:

• Iodine is a solid that may be physically recovered from vapors.
• Iodine sublimation in the presence of oxygen is a chemical reaction.
• Therefore, we may say that iodine sublimation is a result of a physical change or a physio-chemical process.

Electrolysis of water:

• Since water is converted from a liquid to a gas by electrolysis, there is a physical change as well as a chemical transformation that is, of course, irreversible since hydrogen gas and oxygen do not make water when they come into contact.

#SPJ6