Classify which of the following pairs is a compound and a mixture respectively.

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Air, Ocean water

Water, Glucose

Glucose, Salt

Water, Air

answer is D.

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Detailed Solution

Concept- A mixture is something that results from the random distribution of one substance among another substance without any chemical reaction. Homogeneous and heterogeneous mixtures are the two types of mixtures.
Homogenous mixes are those in which each component is present in the exact same quantity throughout the sample. Heterogeneous mixes are those in which the component proportions vary across the entire sample.
A compound is a pure material that is created when two atoms are combined in a whole number ratio. The first two options are air and water. Different gases, including oxygen, nitrogen, and hydrogen as well as dust particles, carbon dioxide, and water, are present in the air. Air is thus regarded as a mixture.
Ocean water is also regarded as a mixture because it contains dissolved salts, gases, and minerals.
Water and glucose is the backup choice. Water has a constant composition with hydrogen to oxygen ratio of 1 to 8. So, we refer to water as a compound.
Additionally, 6 Carbon, 12 Hydrogen, and 6 Oxygen atoms combine to produce glucose. Consequently, glucose is likewise regarded as a compound.
The third choice is salt and glucose. In the second choice, glucose is a component that is already covered. As for NaCl, it is chemically known as sodium chloride or table salt. One sodium ion and one chlorine ion combine to make sodium chloride. Since it has a set composition, it is also a compound.
Water and Air are the fourth choices. The formula for water is

, which is a compound, while air is a mixture of inert gases, dust, oxygen, nitrogen, and carbon dioxide.
Hence, the correct answer is option 4.

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