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Here are 16 words which can be divided into 4 groups of 4 each.

    PLASMAS  HUM      EPIC     BENZ
    OBSC     MUND     COND     HIST
    GRAVEST  CONS     EXT      CAROT
    ARC      OVERT    PROF     FOLDER

Can you group each word into the 4 groups, and find the two-word phrase which connects to all 4 of the groups?

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I believe this connect-wall can be resolved as follows:

Group 1: -ANE
ARCane, MUNDane, HUMane and PROFane

Group 2: -ENE
CAROTene, BENZene, OBSCene and EPICene

Group 3: -OL
PLASMASol, CONSol, EXTol, FOLDERol

Group 4: -ONE
GRAVESTone, OVERTone, CONDone, HISTone

What do these 4 groups have in common? These are:

Hydrocarbon suffixes used in ORGANIC CHEMISTRY.

- Compounds ending in '-ANE' have single C-C bonds between all carbon atoms;
- Compounds ending in '-ENE' have at least one -C=C- carbon double bond;
- Compounds ending in '-OL' contain a -C-OH functional group (alcohols);
- Compounds ending in '-ONE' are 'ketones', with the -C=O functional group.

This ties in with the title, of course, since:

Organic chemistry lies at the very core of all carbon-based living organisms and life as we know it! Pretty much everything, everywhere...

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  • 5
    $\begingroup$ Gah! You are too quick. Just sniped. +1 $\endgroup$ – hexomino Jun 4 at 11:39
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    $\begingroup$ Sorry @hexomino! This came up literally just after I posted my own question so I was onto it from pretty much the very first second this time! $\endgroup$ – Stiv Jun 4 at 11:42
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    $\begingroup$ @Stiv Beside nice answer, nice formatting plus cool hyperlinks. $\endgroup$ – Always Confused Jun 4 at 13:05
  • $\begingroup$ @Stiv great job! Had this idea sitting in an organic chemistry class and decided to try it out. The checkmark is yours! $\endgroup$ – titaniummorro Jun 5 at 6:57
  • $\begingroup$ Ah, so inspired by a true story! Well it worked well - a nice themed puzzle @titaniummorro $\endgroup$ – Stiv Jun 5 at 7:05
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Group-1:

Suffix -ANE viz MUNDANE, PROFANE, ARCANE, HUMANE,

Group-2:

Suffix -ENE viz. BENZENE, CAROTENE,

Group-3:

Suffix -ONE viz HISTONE, OVERTONE, CONDONE, GRAVESTONE

Group 4:

Suffix -OL viz. PLASMASOL, FOLDEROL, EXTOL

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