by Sunday | Mar 17 | Chemistry WAEC
A. 1,2-dichloroethane B. 1,2-dichloroethene C. 1,1-dichloroethane D. 1,1-dichloroethene Correct Answer: Option A – 1,2-dichloroethane Explanation – The chemical compound 1,2-dichloroethane, commonly known as ethylene dichloride (EDC), is a chlorinated...
by Sunday | Mar 17 | Chemistry WAEC
A. C3H8O B. C6H12O C. C6H12O2 D. C12H12O11 Correct Answer: Option B – C6H12O Explanation C = 72 / 12 H = 12 / 1 O = 16 / 16 C = 6 H = 12 O = 1 : EMPIRICAL FORMULA C6H12O
by Sunday | Mar 17 | Chemistry WAEC
A. turns lime water milky B. decolorizes bromine water C. gives a pop sound D. turns lead(ii)ethanoate paper black Correct Answer: Option D – turns lead(ii)ethanoate paper black Explanation – Iron sulfide reacts with hydrochloric acid, releasing hydrogen...
by Sunday | Mar 17 | Chemistry WAEC
A. C2H4CO2H B. C2H5CO2H C. CH3OH D. CH3CO2H Correct Answer: Option D – CH3CO2H Explanation -Potassium dichromate solution is acidified with dilute sulphuric acid to oxidise ethanol into ethanoic acid.
by Sunday | Mar 17 | Chemistry WAEC
A. exothermic B. endothermic C. spontaneous D. slow Correct Answer: Option B – endothermic Explanation – Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products. – A system of...
by Sunday | Mar 17 | Chemistry WAEC
A. heat is absorbed B. heat is evolved C. oxygen is liberated D. hydrogen is given off Correct Answer: Option B – heat is evolved Explanation – When quicklime is added to water, it forms slaked lime along with the evolution of heat. There will be a rise in...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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