Question

write the difference between fat and oil

Answer 1

One of these nutrients is solid at room temperature and the other is liquid – but they are both very energy dense so limiting their intake is probably a good idea for most people. Learn more about fat and oil in this article at iPT.
Fats and oils make an important contribution to adequate nutrition, they are a source of energy for the body, they insulate and protect the body’s vital organs, they are a source of essential fatty acids and they are required for the absorption of the fat soluble vitamins A, D, E and K
The most obvious and defining difference between fats and oils is that fats are typically solid at room temperature whereas oils are liquid at room temperature.
Fats and oils enter our diet through a variety of sources; dairy products, and meat, fish, poultry and seafood are all sources of fats, and some vegetable and plant foods are sources of oils.
Fats and oils also enter our diet through many of the products we add to our foods to aid cooking or to simply make them more ‘palatable’.  Such additions include; butter, margarine, lard, mayonnaise, ghee and cooking oils.

Answer 2

fat will become solid at room temperature but oil will remain liquid at room temperature