37. A water molecule consists of two hydrogen atoms bonded to an oxygen atom. Which type of substance is water?
Answer: B
Water is a compound.
Water is classified as a compound because it is made up of two different elements, hydrogen and oxygen, chemically bonded together in a fixed ratio.
A) Element
An element is a pure substance that cannot be broken down into simpler substances by chemical means. Since water is composed of both hydrogen and oxygen atoms, it does not qualify as an element.
B) Compound
A compound is a substance formed when two or more elements are chemically bonded together. Water (H₂O) consists of two hydrogen atoms and one oxygen atom, making it a classic example of a compound.
C) Isotope
An isotope refers to variants of a particular chemical element that have the same number of protons but different numbers of neutrons. This term does not apply to water, which is a specific chemical compound rather than a type of element.
D) Mixture
A mixture consists of two or more substances that are not chemically bonded. Water is not a mixture, as it involves a chemical combination of hydrogen and oxygen, resulting in a new substance with distinct properties.
Conclusion
Water is definitively identified as a compound due to its composition of hydrogen and oxygen in a specific molecular structure. All other options fail to accurately describe water, either by misclassifying its properties or by defining unrelated concepts.