by Sunday | Sep 24 | NABTEB QUESTIONS
i. Arrange the following metals in the order of increasing reactivity. ii. Hence state which of them can be extracted by electrolysis. iii. Why is zinc said to be amphoteric. Solution: i. Au, Sn, Zn, Mg, Ca, Na ii. Na, Ca, Mg iii. Zn is amphoteric because it...
by Sunday | Sep 24 | NABTEB QUESTIONS
Faradays’ second law of electrolysis states that when the same quantity of electricity is passed through different electrolytes, the relative number of moles of the elements discharge are inversely proportional to the charges on the ions of the element.
by Sunday | Sep 24 | NABTEB QUESTIONS
Solution: Selective discharge is affected by the position of the ions in the electrochemical/activity series. Concentration of the ions in the electrolyte. Type of electrodes used for the electrolysis
by Sunday | Sep 24 | NABTEB QUESTIONS
Solution: ( 1) It forms trioxocarbonate iv acid when dissolved in water; C02 (g) +H2O (l) → H2CO3 (aq) (2) It reacts with an alkali to form a trioxocarbonate v salt and water. e.g (i) 2NaOH+CO2 → Na2CO3 +H2O (ii) Ca(OH)2 + CO2 → CaCO3 +H2O (3) Hot magnesium burns...
by Sunday | Sep 24 | NABTEB QUESTIONS
i. H2SO3 = Trioxosulphate iv acid ii. KMnO4 = Potassium tetraoxomanganate vii iii. K2Cr2O7 = Potassium heptaoxochromate vi iv. (NH4)2SO4 = Ammonium tetraoxosulphate vi
by Sunday | Sep 24 | NABTEB QUESTIONS
Solution: i. Formula mass is the mass of all atoms/ ions and in formula (of a compound or an ion) formula mass of NaCl = 23+35.5g = 58.5g ii. Ionic equation is the chemical equation of reaction using the ions that are involved in the reaction as reactants and...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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