Anomalous Expansion of Water

Q.

How do fish survive in frozen water

Q.

The maximum density of water is at the temperature of ${39.2}^{\circ }F$ .

1. 32°F

2. 39.2°F

Q.

Differentiate between the following: Expansion and Contraction.

Q.

A given mass of water is cooled from ${10}^{\circ }Cto{0}^{\circ }C$. State the volume changes observed. Represent these changes on a temperature - volume graph.

Q.

Discuss any two applications of thermal expansion in liquids.

Q.

Due to anomalous expansion of water aquatic life doesn't freeze.

1. True

2. False

Q.

State the volume changes observed when a given mass of water is heated from $0^{\circ }$ to ${10}^{\circ }$. Sketch a temperature-volume graph to show the behaviour.

Q.

Water is cooled from $4^{\circ }Cto{0}^{\circ }C$. It :

(a) contracts (b) expands

(c) first contracts, then expands

(d) first expands, then contracts.

Q.

Process of increase in size or volume of a substance on heating is known as __________ .

Q.

What do you mean by anomalous expansion of water?

Q. Describe an experiment to show that water has maximum density at $4C$. What important consequences follow from this peculiar property of water? Discuss the importance of this phenomenon in nature.

Q.

A little space is left in medicine bottles-give reason

Q.

Water is heated from $0^{\circ }C$ to ${10}^{\circ }C$. How does the density of water change with temperature ?

Q.

What is real and apparent expansion of liquids

Q.

If water is cooled from $4^{\circ }$C to $0^{\circ }$C. Which of the following conditions will be true for water.

1. Water's molecules will begin to form a hexagonal structure.

2. Water density will increase.

3. The volume of the water will expand

4. The upper surface of the water will be colder.

Q.

When the volume of a substance increases on heating, it is known as _________ expansion.

Q.

Density of water is maximum at :

(a) $0^{\circ }C$ (b) ${100}^{\circ }C$

(c) $4^{\circ }C$ (d) ${15}^{\circ }C$

Q.

Which of the following graph shows the variation in the volume of 1 g of water with the temperature in the range from $0{}^{\circ }C$ to $10{}^{\circ }C$?

1. 

2. 

3. 

4. 

Q. Which scale of temperature is commonly used and why?

Q.

Water on heating from 0 ${}^{\circ }$C to 4 ${}^{\circ }$C contracts and on further heating it expands.

1. True

2. False

Q. What do you mean by anomalous expansion of water?

Q. Which scale of temperature is commonly used and why?

Q.

Water expands when it is cooled from ___${}^{\circ }C$ to ___${}^{\circ }C$, this is known as the anomalous expansion of water.

Q. A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1 cm when a man gets on it. The mass of the man is:

1. 12 kg
2. 60 kg
3. 72 kg
4. 96 kg

Q. A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1 cm when a man gets on it. The mass of the man is:

1. 12 kg
2. 60 kg
3. 72 kg
4. 96 kg

Q. Water is heated from $0^{o}C$ to ${10}^{o}C$. How does the density of water change with temperature?

1. On heating, density of water increses.
2. Density of water is independent of temperature
3. On heating , density of water decreases
4. On heating from $0^{o}C$, the density of water increases up to $4^{o}C$ and then decreases beyoud $4^{o}C$.

Q. When a metal bar is heated, the increase in length is greater, if :

1. the bar has large diameter
2. the bar is long
3. the temperature rise is small
4. small diameter

Q. The expansion of water when cooled from $4^{\circ }\text{C}$ to $0^{\circ }\text{C}$ is known as the _________ expansion of water.

1. abnormal
2. none of the above
3. normal
4. anomalous

Q.

The temperature of water at the surface of a deep lake is $2^{\circ }C$. The temperature expected at the bottom is

1. 0°C

2. 2°C

3. 4°C

4. 6°C

Q. Deep pond of water has its top layer during water. State the expected temperature of water layer at the bottom of pond.