Which property of metals is useful in cooking utensils?

Correct answer: Heat conductivity

The direct answer is A: heat conductivity, more precisely thermal conductivity. Cooking utensils must receive heat from a flame or heating surface and transfer it to the food. Metals generally conduct heat well, so heat spreads through a metal pan more effectively than through a poor conductor. Step by step: the flame supplies heat; the metal base absorbs and conducts it; the food receives heat and cooks. Option A is correct. Option B, bitter taste, is not a useful property of utensils and is not a general property of metals. Option C, extreme brittleness, would make a utensil break easily, so it would be undesirable. Option D, gaseous state, is wrong because ordinary cooking utensils need to be solid and retain their shape. Some handles may use poor conductors to reduce heating, but the pan itself is useful because of metal’s thermal conductivity. Remember: pan body conducts heat; handle is often insulating.