by Sunday | Dec 27 | Chemistry JAMB
A. valves B. open-hearths C. arcs D. tuyeres Correct Answer: Option D – tuyeres Explanation Pre-heated air at about 600ºC is blown into the furnaces from the bottom through the tuyeres.
by Sunday | Dec 27 | Chemistry JAMB
A. magnetite B. haematite C. carbon(ii)oxide D. calcium trioxosilicate(iv) Correct Answer: Option B – haematite Explanation Cast iron + haematite = wrought iron
by Sunday | Dec 27 | Chemistry JAMB
A. milk B. kerosene C. soil D. smoke Correct Answer: Option D – smoke Explanation Solid in gas mixture: Smoke, ice clouds, dust. Liquid in gas mixture: fog, mist, vapour and hair sprays. Gas in solid mixture: aerogel,...
by Sunday | Dec 27 | Chemistry JAMB
A. 40J/K B. 400J/K C. 4J/K D. 0.4J/K Correct Answer: Option B = 400J/K
by Sunday | Dec 27 | Chemistry JAMB
A. HC≡CCH2CH3 B. CH2≡CH2CH3 C. CH3C≡CCH3 D. CH3CH≡CHCH3 Correct Answer: Option D – CH3CH≡CHCH3 Explanation An alkene is produced when dehydration of alcohol is performed. Alcohol dehydration is an example of an elimination reaction which is quite the opposite of...
by Sunday | Dec 27 | Chemistry JAMB
A. fog B. carbon(ii)oxide C. smog D. sulphur(iv)oxide Correct Answer: Option B – carbon(ii)oxide Explanation The most common source of carbon monoxide is the partial combustion of carbon-containing compounds
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