BharatNotes Monomer
nounUsage in a UPSC answer
Just as a single monomer is inert until it links with countless others to form a durable polymer, an individual citizen's vote acquires its true transformative power only when aggregated into the larger fabric of collective democratic will.
Synonyms
Antonyms
Word Family
monomer (n), monomers (n pl), monomeric (adj), polymer (n), oligomer (n), polymerise (v)
Root
Greek monos = single + Greek meros = part; mono- prefix = one
Etymology
From Greek monos (single) + meros (part); first recorded in English in the 1910s.
Memory Hook
MONO ("one") + MER ("part") = "one part" — a single building block that snaps together with many others to make a polymer ("many parts").
How This Word Works in UPSC Writing
The small molecule that links repeatedly to build a polymer chain. The requirement that makes a molecule capable of it is functional rather than incidental: it must carry at least two reactive sites, or a double bond that can open to provide them, since a molecule reactive at only one point terminates a chain instead of extending it. The standard pairs are worth holding in memory, as questions test them directly: ethene gives polythene, vinyl chloride gives PVC, tetrafluoroethene gives Teflon, styrene gives polystyrene, and in nature amino acids give proteins while glucose gives starch and cellulose. One practical consequence deserves note. A monomer can be considerably more hazardous than the polymer it forms, so residual unreacted monomer is a genuine concern in food-contact plastics and is what food-grade certification is largely testing for.
Don’t Confuse It With
A monomer is the unit before joining, while the repeat unit is what actually appears in the chain, and the two differ where polymerisation eliminates atoms. A dimer is two units joined and a trimer three. A homopolymer is built from one kind of monomer and a copolymer from two or more. The degree of polymerisation is the number of units in a chain, and it largely determines the strength of the resulting material.
Hindi Meaning
एकलक (ekalak).
Common Questions
- What is a monomer?
- A small molecule capable of bonding repeatedly with others of its kind to build up a polymer chain.
- What makes a molecule able to act as a monomer?
- It must have at least two reactive sites, or a double bond that can open to create them, since a molecule reactive at only one point would end the chain rather than extend it.
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