Question

Ice is lighter than water as?
A.Lattice aggregates occupy more space.
B.Cold water is extremely dense.
C.Hydrogen bonds are absent in ice.
D.Lattice aggregates are absent in ice.

Answer 1

Hint:In order to answer this question you need to recall the concept of hydrogen bonding. For a better idea, the attraction between molecules of water is called hydrogen bonding.

Complete step by step answer:
-Generally in liquids the molecules are free to move, slide, rotate within the liquid, resulting in a more packed structure. The hydrogen bonds break and reform at the liquid state continuously. However, when a sufficient amount of heat is removed from water, the energy of the molecules decreases and freezing occurs. In solid form (ice), the molecules form a crystal lattice whereby the molecules are spaced further apart.
-As we already know water ice occupies more space than liquid water. In simple words generally when temperature drops below a certain point, the water molecules tend to rearrange in a more ordered way forming shapes called crystals. Due to which they take more space. So, as we can see, ice has the same amount of molecules as the liquid but takes up more space because they are lined up and not packed against each other. This means water expands when it turns into ice.

Therefore, Ice is less dense than liquid water because lattice aggregates occupy more space. Therefore, option A is the required answer.

Note: Remember that most of the things become more dense when they are cool because their molecules are condensing together, and similarly they become less dense when they heat up as the molecules are moving far from each other.