Anomalous Expansion of Water

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.

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. Water _____ on freezing.

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

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

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

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

1. abiotic

2. natural

3. biotic

4. inorganic

Q. An iron rod _____ on heating.

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

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