Question

The density of water is maximum at
A.${39.2^ \circ }F$
B.${4^ \circ }F$
C.${0^ \circ }C$
D.$273K$

Answer 1

When attempting questions regarding density like the one given to us above, keep in mind that water is a special colorless, odorless liquid whose density increases with decrease in temperature, but only to a certain limit. A limit which after reaching and crossing, its density starts to decrease.
Complete answer:
Water is the principal ingredient of this planet's lakes, oceans, streams, and the fluids of most living organisms. It is odourless, tasteless, clear, and colourless.
A substance's density defined as its mass per unit volume.
A material's density defined as its mass per unit volume. It's a metric for how densely matter is packed together. The connection between a substance's mass and the volume it occupies can be described as its density.
When we talk about the density of water, it is the weight of the water per unit volume, which depends on the temperature of the water.
A substance's density can be influence by several things. Some factors which affect the density of water are given in the points below.
The density of water is around approximately $1$ gram/ cubic centimeter ($1g/c{m^3}$).
It is temperature-dependent, but this relation is said to be non- linear and also it is unimodal in nature rather than monotonic.
When liquid water is chill below room temperature, it tends to become progressively thick, as with another kind of substance, but approximately at about ${4^ \circ }C$pure water is said to reach its maximum density.
It tends to expand and become less dense as it cools more. This type of peculiar negative thermal expansion is caused by strong, orientation-dependent intermolecular forces or interactions, and it can be seen in the form of molten silica.
Hence, we can conclude by saying that water reaches its maximum density at ${4^ \circ }C$ which when converted to Fahrenheit, we get ${39.2^ \circ }F$
So, our correct option is option (A).

Note: Water's density fluctuates with temperature hence, it doesn't have an absolute density. In the liquid state, it has a higher density than in the solid-state. Varied substances have different densities, which means they weigh differently for the same volume; heavier substances, such as honey, settle towards the bottom of the water, while lighter substances, such as oil float, at the top.