Give reasons:(a) Water is used as a cooling agent(b) Water pipes burst

1.	Give reasons:(a) Water is used as a cooling agent(b) Water pipes burst in severe winters.(c) It is difficult to cook in hills compared to plains.(d) Ice floats on water.(e) Sea water does not freeze at 0°C.
Answer» (a) Water has a high specific heat. Water neither heats up or cools down quickly. This property makes water an excellent cooling agent. (b) Water pipes burst in severe winter because the water inside I the pipes freezes and increases its volume. (c) Water boils at a lower temperature in the hills, where the atmospheric pressure is lower than in the plains. This is why it takes a longer time to cook in hilly regions. (d) Ice has a low density as compared to water. Water has the maximum density at 4°C. That is why ice floats on water. (e) There are impurities dissolved in seawater which increases the freezing point. That is why sea water does not freeze at 0°C.

Give reasons:(a) Water is used as a cooling agent(b) Water pipes burst in severe winters.(c) It is difficult to cook in hills compared to plains.(d) Ice floats on water.(e) Sea water does not freeze at 0°C.

Answer»

(a) Water has a high specific heat. Water neither heats up or cools down quickly. This property makes water an excellent cooling agent.

(b) Water pipes burst in severe winter because the water inside I the pipes freezes and increases its volume.

(c) Water boils at a lower temperature in the hills, where the atmospheric pressure is lower than in the plains. This is why it takes a longer time to cook in hilly regions.

(d) Ice has a low density as compared to water. Water has the maximum density at 4°C. That is why ice floats on water.

(e) There are impurities dissolved in seawater which increases the freezing point. That is why sea water does not freeze at 0°C.

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