Anomalous Expansion of Water

Q. Identify the change in state of water during the melting of polar ice caps.

1. Liquid $\to$ solid
2. Gas $\to$ solid
3. Gas $\to$ liquid
4. Solid $\to$ liquid

Q.

Vapour pressure of a liquid decreases with increase in:

1. Polarity of liquid molecules

2. Temperature

3. Viscosity

4. Pressure

Q.

On a sunny day, Hina observed that the puddles in her garden dried up quickly. This happens due to:

1. Evaporation

2. Freezing

3. Melting

4. Solidification

Q.

Water has maximum density at _________.

Q. In winter, water pipelines sometimes burst. Choose the correct option responsible for the cause.

1. Anomalous expansion of water.
2. Evaporation of water.
3. Condensation of water.
4. None of these.

Q. Water _____ on freezing.

1. expands
2. contracts
3. flows
4. condenses

Q. Plants with green and tender stem are called _______.

1. herbs
2. creepers
3. trees
4. climbers

Q. Does the water show Anomalous expansion when it is heated from zero to 4 degree Celsius and cooled from 4 degree to 0 degree Celsius.

Q. During freezing of lakes, in cold countries, temperature of the surrounding remains moderate as during the process of freezing

1. heat is released
2. heat is absorbed
3. no heat is released
4. no heat is absorbed

Q. Water _____ on freezing.

1. 
   Expands

2. Contracts

3. 
   Flows
4. 
   condenses

Q.

Which of the following is not a result of evaporation?

1. It changes colors

2. It expands

3. It contracts

4. It disappears

Q. At 4^oC, water has minimum density and maximum volume. State true or false.

1. True.
2. False.

Q. Sunlight and heat are ________ factors of an ecosystem.

1. abiotic

2. natural

3. biotic

4. inorganic

Q. Identify the change in state of water during the melting of polar ice caps.

1. Gas $\to$ liquid
2. Solid $\to$ liquid
3. Liquid $\to$ solid
4. Gas $\to$ solid

Q. When we heat water in a pan, it begins to boil after sometime. If we continue to heat further, the quantity of water in the pan begins to decrease. This happens due to _________.

1. condensation
2. evaporation
3. solidification
4. freezing

Q.

As temperature increases from $0^{\circ }Cto{4}^{\circ }C$ the density of water ______

Q. Density of water varies with temperature. What are its consequences ?

Q.

What ll happen if we put a plant in the freezer wait for one day?

Q.

The anomalous expansion of water is a boon to which of the given habitats in cold regions?

1. Terrestrial habitat

2. Aquatic habitat

3. Grassland habitat

4. Mountain habitat

Q. How does the density of water changes when:
(a) it is heated from $0^{\circ }C$ to $4^{\circ }C$,
(b) it is heated from $4^{\circ }C$ to ${10}^{\circ }C$

Q. The mirror in your bathroom turns foggy after you take a hot shower. This is due to _____.

1. melting
2. precipitation
3. condensation
4. evaporation

Q.

Boil water in a pan. Keep on boiling until all the water in the pan has evaporated. What do you observe in a pan and why?