by Sunday | Dec 27 | Chemistry WAEC
A. chlorine and sodium. B. oxygen and hydrogen. C. chlorine and hydrogen. D. hydrogen and oxygen. Correct Answer: Option B – oxygen and hydrogen. Explanation Oxygen is produced at the anode and hydrogen is produced at the cathode in dilute...
by Sunday | Dec 27 | Chemistry WAEC
A. MO B. MO2 C. MO3 D. MO4 Correct Answer: Option C = MO3 Explanation Data obtained from the question M = 60 g O = 24 g Empirical formula =? How to determine the empirical formula Divide by their molar mass M = 60÷120 = 0.5 O = 24 ÷16 = 1.5 Divide by the smallest M =...
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...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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