by Sunday | Sep 15 | Chemistry JAMB
A. 20 B. 32 C. 14 D. 12 Correct Answer: Option B – 32 Explanation Molecular mass = vapour density x 2 Mm of XO2 = x + 16(2) = x + 32 vapour density = 32 ∴ x + 32 = 32 × 2 x + 32 = 64 x = 64 – 32 x = 32 ∴ the relative molecular mass of X is 32 Relative...
by Sunday | Sep 15 | Chemistry JAMB
A. −100°C B. −273°C C. −373°C D. 0°C Correct Answer: Option B = −273°C Explanation Where −273°C = 0 K i.e −273°C + 273 = 0 K At zero kelvin, the volume of a gas becomes zero.
by Sunday | Sep 15 | Chemistry JAMB
A. sp² hybridized B. sp³ hybridized C. sp4 hybridized D. sp hybridized Correct Answer: Option B – sp³ hybridized Explanation Alkane’s family are sp³ hybridized
by Sunday | Sep 15 | Chemistry JAMB
A. Fe³+ (H2O)6 B. FeO.H2O C. Fe2O3.3H2O D. Fe3O4.2H2O Correct Answer: Option C – Fe2O3.3H2O Explanation Iron [Fe] reacts with H2 in the presence of oxygen to form a rust. 4Fe + 3O2 → 2Fe2O3 Fe2O3 + H2O →...
by Sunday | Sep 15 | Chemistry JAMB
Cu2S(g) + O2(g) → 2Cu + SO2(g) A. 0 to + 2 B. 0 to + 1 C. + 1 to 0 D. + 2 to + 1 Correct Answer: Option C = + 1 to 0 Explanation In the reactant; Cu2S 2Cu – 2(1) = 0 2Cu = 2 Cu = 2/2 Cu = +1 In the product, Cu Cu = O The oxidation number of Cu in Cu2S and Cu...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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