Label the following diagram and name the property can be studied using it :[Diagram of Hope’s apparatus: a tall cylindrical vessel with a wider trough at the top marked A; a thermometer T2 in the upper part reads 0 ºC; a thermometer T1 in the lower p…

Answer: A – freezing mixture (ice and salt); B – 4 ºC; the property studied is the anomalous behaviour of water.

A is the trough containing a freezing mixture of ice and salt, which cools the water at the top. The thermometer T₂ shows 0 ºC near the top, while T₁ at the bottom shows 4 ºC even after a long time.

This shows that water at 4 ºC is the densest: it stays at the bottom while the colder, lighter water stays above. The apparatus (Hope’s apparatus) is used to study the anomalous behaviour of water and to show that water has maximum density at 4 ºC.