by Sunday | Mar 19 | Chemistry JAMB
Four elements P; Q; R and S have atomic numbers of 4, 10, 12, and 14 respectively. Which of these elements is a noble gas? A. P B. Q C. R D. S Correct Answer: Option B = Q Explanation They are the most stable due to having the maximum number of valence electrons their...
by Sunday | Mar 19 | Chemistry JAMB
A. 1.650atm B. 0.825atm C. 0.413atm D. 0.275atm Correct Answer: Option A = 1.650atm Explanation Using the combined gas law formula, Given that P1 = 0.825, V1 = 2.76 L, V2 = 1.38 L, P2 = ? And T1 = T2; we would have P2 = [ P1 X V1 ] ÷ V2 : [0.825 X 2.76] ÷ 1.38 =...
by Sunday | Mar 19 | Chemistry JAMB
A. Granulated sugar B. Seawater C. Sodium chloride D. Iron filling Correct Answer: Option B = Seawater Explanation A mixture contains two or more constituents which can be easily separated by physical methods. Examples include Air, Soil, Palm oil, Sea water, Blood,...
by Sunday | Mar 19 | Chemistry JAMB
A. Oxyethene B. Oxyhydrocarbon flame C. Oxyacetylene flame D. Oxymethane flame Correct Answer: Option C – Oxyacetylene flame Explanation The reaction of calcium carbide with water, producing acetylene and calcium hydroxide, was discovered by Friedrich Wöhler in...
by Sunday | Mar 19 | Chemistry JAMB
A. Acid B. Ester of alkanoic acid C. Alkali C. Alkanol Correct Answer: Option C – Alkali Explanation Lye is a metal hydroxide traditionally obtained by leaching wood ashes, or a strong alkali that is highly soluble in water producing caustic basic solutions / an...
by Sunday | Mar 19 | Chemistry JAMB
A. Steam distillation B. Destructive distillation C. Liquefication D. Hydrolysis Correct Answer: Option B – Destructive distillation Explanation Destructive distillation of a tonne of coal can produce 700 kg of coke, 100 liters of liquor ammonia, 50 liters of...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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