Question

The surface water in a lake is just going to freeze. What is the temperature of water at the bottom ?

• A. 0 C
• B. More than 4 C
• C. 4 C
• D. Less than 4 C
• E. -2 C

Answer 1

The correct option is C 4 C

$\begin{array}{c}\text{We know that water density is maximum at bottom of}\\ \text{lake. we also know that the water attains its maxi-}\\ \text{-mum density at}{4}^{\circ }C\text{. Density below or above}{4}^{\circ }C\text{is}\\ \text{less than density at}{4}^{\circ }C\text{.}\end{array}$