Question

why is melting of ice cold? Explain in terms of energy transfer

Answer 1

Ice will melt faster in a pot of boiling water than in a pot of room temperature water.
What they might mean is that the ice melted faster under a stream of tap water than in a pot of hot water. That is because of the constant resupply of relatively warm (10-20C) moving water, while in a pot of still hot water, the ice will rapidly cool its surrounding water leading to a slower loss of heat.