Question

Why is freezing mixture used in Hope's apparatus?

Answer 1

Answer:

The temperature of water begins to fall due to the freezing mixture at the centre and it contracts. (d) As temperature of water falls below 4∘C, water expands instead of contracting and its density decreases. ... (g) Being a bad conductor of heat, ice prevents the loss of heat from water below it into the surroundings.

Answer 2

Answer:

mixture of ice and Salt

Explanation:

as it keep ice in its state for a longer period