Which of the following is a pure substance?
a) Air
b) Distilled water
c) Steel
d) Brass
Answers
Answered by
1
Distilled water is a pure substance. (option b)
- A pure substance is one that consists of a single type of molecule.
- Air is a mixture of different gases such as Oxygen, Hydrogen, carbon dioxide, water vapors, etc.
- Steel - alloy of iron and 2% carbon,1% manganese with small amounts of silicon, phosphorous, sulfur, and oxygen.
- Brass - an alloy of zinc and copper.
- Hence all these consist of more than 1 type of element or substance and are not pure.
- Alloy is mostly a metallic substance consisting of two or more elements, either in the form of a compound or solution.
Similar questions