Question

Find the odd man out:

Brass, Bronze, stain less steel, phosphorus.​

Answer 1

Phosphorus

Brass, Bronze and stainless steel are alloys while phosphorus is a pure element.

• Brass is an alloy of copper (Cu) and zinc (Zn), in proportions Brass is an alloy of copper (Cu) and zinc (Zn), in proportions which can be varied to achieve varying mechanical and chemical properties.
• Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (such as aluminium, manganese, nickel or zinc) and sometimes non-metals, such as phosphorus, or metalloids such as arsenic, or silicon. These additions produce a range of alloys that may be harder than copper alone or have other useful properties, such as strength, ductility, or machinability.
• Stainless Steel is an alloy of iron that is resistant to rusting and corrosion. It contains at least 11% chromium and may contain elements such as carbon, other nonmetals and metals to obtain other desired properties. Stainless steel's resistance to corrosion results from the chromium, forming a passive film that can protect the material and self-heal in the presence of oxygen.
• Phosphorus is a chemical element with the symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth.