by Sunday | Mar 17 | Chemistry WAEC
A. +1 B. +3 C. +5 D. +6 Correct Answer: Option C = +5 Explanation The oxidation number of chlorine in NaClO3 is +5.
by Sunday | Mar 17 | Chemistry WAEC
A. shared between participating atoms B. gained by the most electropositive atom C. gained by the most electronegative atom D. lost by both participating atoms. Correct Answer: Option B – gained by the most electropositive...
by Sunday | Mar 17 | Chemistry WAEC
A. Halogens B. Anions C. Halide D. Cations Correct Answer: Option A – Halogens
by Sunday | Mar 17 | Chemistry WAEC
A. Crystallization B. Distillation C. Filtration D. Decantation Correct Answer: Option A – Crystallization Explanation – Crystallization is primarily employed as a separation technique in order to obtain pure crystals of a substance from an impure mixture....
by Sunday | Mar 17 | Chemistry WAEC
A. First ionization energy and reactivity B. melting point and atomic radius C. Reactivity and electronegativity D. First ionization energy and melting point Correct Answer: Option D – First ionization energy and melting point Explanation – The ionization...
by Sunday | Mar 17 | Chemistry WAEC
A. its low boiling point. B. its low freezing point. C. its covalent nature D. hydrogen bonding Correct Answer: Option D – hydrogen bonding Explanation Ethanol is an alcohol that is soluble in water. This is because of the hydroxyl group (−OH) in the ethanol...
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