by Sunday | Dec 27 | Chemistry JAMB
A. But-1-yne B. 2-methyl But-1-ene C. 3-methyl prop-1-yne D. But-2-ene Correct Answer: Option D – But-2-ene Explanation Isomers of Butene: are But-1-ene, But-2-ene, 2-Methylpropene or 2-methylprop-1-ene
by Sunday | Dec 27 | Chemistry JAMB
GAS CO2 N2 O2 % BY VOLUME 4 72 24 A. CO2 and O2 B. N2 and CO2 C. CO2, O2 and N2 D. O2 and N2 Correct Answer: Option A = CO2 and O2 Explanation The air in Earth’s atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small...
by Sunday | Dec 27 | Chemistry JAMB
A. in the textile industry B. in the hydrogenation of oils C. as domestic and industrial fuels D. as fine chemicals Correct Answer: Option C – as domestic and industrial fuels Explanation Alkanes are very useful as...
by Sunday | Dec 27 | Chemistry JAMB
A. 4 B. 3 C. 2 D. 1 Correct Answer: Option C – 2 Explanation There are 2 bond pairs in CO₂ and no lone pairs are there.
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
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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