A glass full of hot milk is poured in the table. It begins to cool gradually. Which of the following is incorrect?

Options

A. The rate of colling is constant till milk attains the temperature of the surrounding.
B. The temperature of milk falls off exponentially with time.
C. While cooling, there is a flow of heat from milk to the surrounding as well as form surrounding to the milk but the net flow of heat is form milk to the surrounding and that is why it cools.
D. All three phenomenon, conduction, convection and radiation are responsible for the loss of heat form milk to the surroundings.

Answer

A

Explanation

`2`, `3`, `4` are correct but option `1` is wrong, when hot milk spread on the table heat is transferred to the surroundings by conduction, convection and radiation. Because the surface area of poured milk on a table is more than the surface area of milk filled in law of cooling. Heat also will be transferred from surroundings to the milks but will be lesser than that of transferred from milk to the surroundings. So option `2`, `3` and `4` are correct.