BharatNotes Alloy
noun; verb (transitive)Usage in a UPSC answer
India's impressive headline growth is alloyed by persistent inequality and jobless expansion, a reminder that GDP figures alone cannot certify genuine development.
Synonyms
Antonyms
Word Family
alloy (n/v), alloyed (adj), alloying (v pres.p), unalloyed (adj)
Root
Latin ad- = to + ligāre = to bind → alligāre = to bind → Old French aloier = to combine metals
Etymology
From Old French aloi, from aloier (to combine), from Latin alligāre (to bind together); the sense of "mixture of metals" arose in the mid-17th century.
Memory Hook
Root hook: alloy comes from Latin ligare 'to bind' (think ligament) — metals bound together. Sense hook: mix a little sorrow into ALL your JOY and the joy is alloyed (diminished); keep it pure and it is unalloyed.
How This Word Works in UPSC Writing
A homogeneous material with metallic character made from two or more elements, at least one a metal. Alloying is done to obtain properties no pure metal offers, and the mechanism is structural: foreign atoms of a different size disrupt the regular lattice so that layers no longer slide easily, which is why alloys are generally harder and stronger but less malleable than the parent metal. The standard set is worth knowing precisely, since questions test composition rather than concept: steel is iron with carbon, stainless steel adds chromium and nickel for corrosion resistance, brass is copper with zinc, bronze is copper with tin, solder is lead with tin for its low melting point, and any alloy containing mercury is an amalgam. India's own metallurgical evidence is the Iron Pillar at Mehrauli, dating to around 400 CE in the Gupta period, which has resisted corrosion for some sixteen centuries because its unusually high phosphorus content forms a protective misawite film.
Don’t Confuse It With
An alloy is homogeneous and retains metallic bonding throughout. An amalgam is specifically an alloy in which one component is mercury. A composite combines materials that remain physically distinct phases, such as fibre in a resin, so it is not an alloy. Corrosion is the degradation that alloying often resists chemically, while galvanisation resists it by coating with a sacrificial layer of zinc, which is a covering rather than an alloy.
Hindi Meaning
मिश्रधातु (mishradhātu).
Common Questions
- Why are alloys made?
- To obtain properties the pure metal lacks, such as greater hardness and strength, corrosion resistance, a lower melting point or a desired appearance.
- Why has the Delhi Iron Pillar not rusted?
- Its high phosphorus content, together with low sulphur and the forge-welding used to make it, forms a thin protective film of misawite that shields the iron beneath.
Seen in UPSC Question Papers
- Prelims 2021 — Chemistry
- Prelims 2016 — Chemistry
Real UPSC previous-year questions whose text uses “Alloy” — proof this word earns its place on your list.
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