Question

The surface water in a take in going to freeze. Now the temperature of water at the bottom is:
(A) 274 K
(B) 227 K
(C) 100 K
(D) 0K

Answer 1

Hint The concept that is used to solve this question is the knowledge regarding the freezing point. Freezing point is defined as the temperature below which any liquid will turn into a solid.

Complete step by step answer
We should know that as water freezes, cold water, or we can say ice is formed, comes on the surface and warm water goes down.
Since, the freezing temperature of water is ${{\text{0}}^\circ }{\text{C}}$ or 273 K.
So, water at the bottom should be at a higher temperature. From options, only higher temperature relative to 273 K is 274 K.
So, we can say that the surface water is going to freeze. Now the temperature of water at the bottom is 274 K.

Hence, the answer is Option A.

Note We should know that the melting point is defined as the temperature above which any solid changes the form into the corresponding liquid. The freezing point is lower as compared to the melting point in the case of most of the mixtures and also for certain organic compounds, which include fats.
The freezing point is affected by the types of the molecules of the substance. This is because the force of attraction between the molecules of a solid is higher as compared to liquid and gas. In gas the force of attraction of the molecules is the least.