by Sunday | Sep 14 | Chemistry JAMB
A. the litmus turns blue but no gas is evolved B. the litmus turns blue and oxygen is evolved C. the litmus turns blue and hydrogen is evolved D. the litmus turns red and oxygen is evolved Correct Answer: Option D – the litmus turns red and oxygen is evolved...
by Sunday | Sep 14 | Chemistry JAMB
A. Sodium B. Magnesium C. Iron D. Copper Correct Answer: Option D – Copper Explanation Metals above hydrogen in the activity series can displace or replace hydrogen present in water (H2O) example of such metals are Ca, K, Na etc. But the metals below hydrogen in...
by Sunday | Sep 14 | Chemistry JAMB
A. amount of ions present and their mobilities B. mobilities of the ions present C. amount of ions present D. temperature of the solution Correct Answer: Option A – amount of ions present and their mobilities Explanation The conductivity of a solution depends on...
by Sunday | Sep 14 | Chemistry JAMB
A. Spring water B. River water C. Tap water D. Sea water Correct Answer: Option C – Tap water Explanation Tap water contains less Ca²+ and Mg²+
by Sunday | Sep 14 | Chemistry JAMB
A. it is insoluble in either dilute or concentrated trioxonitrate (V) acid B. it is lower than hydrogen in the electrochemical series C. the reaction with trioxonitrate (V) acid has a light activation energy D. an insoluble oxide is formed on its surface which renders...
by Sunday | Sep 14 | Chemistry JAMB
A. phosphorus (V) oxide B. fused calcium chloride C. calcium chloride D. concentrated tetraoxosulphate (VI) acid Correct Answer: Option D – concentrated tetraoxosulphate (VI) acid Explanation Ammonia gas can be removed from a desiccator by adding a conc. H2SO4...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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