Which characteristic of water protects fish when a lake freezes? cohesion All of

Question

Which characteristic of water protects fish when a lake freezes?

cohesion

All of the these characteristics.

water as a solvent

water is less dense as a solid

Which of the following statements is true?

All of these are true

Water moves up a tree in tubes. These tubes must be polar.

Non-polar molecules would move up trees in the same way water does.

Water moves through a tree mainly using the force of gravity.

Which of the following statements is true concerning hydrogen bonding and the liquid and solid states of water?

Only liquid water forms hydrogen bonds.

Only solid water forms hydrogen bonds.

Both liquid and solid states of water form hydrogen bonds.

Explanation / Answer

1.   water is less dense as a solid

Mainly the ice that is formed is at lake's surface that means when water changes to ice form it floats on the surface.

2. Water moves up a tree in tubes. These tubes must be polar.

water is polar so in order for water to move the tubes through which it travels must also be polar.

3. Both liquid and solid states of water form hydrogen bonds.

Hydrogen bonds are formed by water in solid as well as liquid form. Hydrogen bonding is responsible for expansion of water during freezing and in liquid form hydrogen bonding is responsible for high boiling and melting points.

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