An ice cube is floating in water above which a layer of a fighter oil is poured. As the ice melts completely, the level If water surface (or interface) and upper level of oil will

Options

A. rise and fall
B. fall and rise
C. not change and change
D. not change and fall not

Answer

A

Explanation

When the oil is poured the fraction of ice in the water decreases, i.e., volume of ice melted into water is greater than volume of water displaced by ice. So, water level rise. Overall volume of ice will decrease as it melts. So the upper level of oil falls.