by Sunday | Dec 27 | Chemistry JAMB
A. fractional crystallization B. fractional distillation C. filtration D. chromatography Correct Answer: Option B – fractional distillation Explanation A process called fractional distillation is used in oil refineries to separate (as well as join or split) the...
by Sunday | Dec 27 | Chemistry JAMB
A. C3H8 B. C2H6 C. C4H10 D. C2H4 Correct Answer: Option D – C2H4 Explanation If you shake an alkene with bromine water (or bubble a gaseous alkene through bromine water), the solution becomes colourless. Alkenes decolourise bromine...
by Sunday | Dec 27 | Chemistry JAMB
A. hydrogen sulphide B. carbon(ii)oxide C. chlorine D. sulphur(iv)oxide Correct Answer: Option B – carbon(ii)oxide Explanation When too much carbon monoxide is in the air you’re breathing, your body replaces the oxygen in your red blood cells with carbon...
by Sunday | Dec 27 | Chemistry JAMB
A. alkene B. alkane C. alkyne D. alkanol Correct Answer: Option C – alkyne Explanation Terminal alkynes react with Tollens reagent (ammoniacal silver nitrate solution) to form silver alkynides as a white precipitate, whereas internal alkynes do not react with...
by Sunday | Dec 27 | Chemistry JAMB
A. Low temperature and high pressure B. Low temperature and low pressure C. high temperature and low pressure D. high temperature and high pressure Correct Answer: Option A = Low temperature and high pressure Explanation Low temperature and high pressure favor the...
by Sunday | Dec 27 | Chemistry JAMB
A. RCONHR1 A. RCONH2 C. RNH2 D. RCOR1 Correct Answer: Option C – RNH2 Explanation Amines possess a characteristic ammonia smell, liquid amines have a distinctive “fishy” and foul smell. -Amine....
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