by Sunday | Dec 27 | Chemistry WAEC
A. Benzene B. Hexane C. Hexene D. Hexanol Correct Answer: Option C – Hexene Explanation The addition of bromine to most alkenes is so fast that when bromine is added dropwise to a solution of the alkene the red bromine color disappears almost immediately. In...
by Sunday | Dec 27 | Chemistry WAEC
A. The hydrogen gas is at a pressure of 1 atmosphere B. A solution containing 1 mol dm-3 of H+ (aq) ions is used C. A platinum electrode is used D. The temperature is kept at 20°C Correct Answer: Option D = The temperature is kept at 20°C Explanation The standard...
by Sunday | Dec 27 | Chemistry WAEC
A. bromine in tetrachloromethane B. concentrated tetraoxosulphate(VI) acid C. aqueous potassium tetraoxomanganate(VII). D. sodium hydroxide solution. Correct Answer: Option B – concentrated tetraoxosulphate(VI) acid Explanation An alkene reacts with conc. H2SO4...
by Sunday | Dec 27 | Chemistry WAEC
A. One Faraday B. One ampere C. Three Faradays D. Three amperes Correct Answer: Option C – Three Faradays Explanation AlCl3 → Al3+ + 3Cl- At cathode: Al3+ + 3e- → Al 3 mole of electrons corresponds 3 F charge So, required charge =3...
by Sunday | Dec 27 | Chemistry WAEC
A. nylon B. protein C. starch D. polyethene Correct Answer: Option D – polyethene Explanation Condensation polymers are any kind of polymers whose process of polymerization involves a condensation reaction.
by Sunday | Dec 27 | Chemistry WAEC
A. the formation of unionized fatty acid. B. increase in the pH of the soap molecules. C. anti-biodegradable effect of hydrogen ions D. the hardness of the acidic water. Correct Answer: Option A – the formation of unionized fatty acid. Explanation Soaps cannot...
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