by Sunday | Sep 14 | Chemistry JAMB
A. 196 B. 49 C. 106 D. 82 Correct Answer: Option B = 49 Explanation Molecular mass = Vapour Density x 2 Vapour Density = Molecular Mass/2 Where Molecular mass = 98g/mol Vapour Density = 98/2 Vapour Density =...
by Sunday | Sep 14 | Chemistry JAMB
A. solder B. steel C. permalloy D. bronze Correct Answer: Option D – bronze Explanation Bronze is an alloy consisting primarily of copper, commonly with about 12% tin and often with the addition of other metals (such as aluminium, manganese, nickel, or zinc) and...
by Sunday | Sep 14 | Chemistry JAMB
A. 16 B. 48 C. 40 D. 12 Correct Answer: Option B – 48
by Sunday | Sep 14 | Chemistry JAMB
A. greater than their atomic radii B. unaffected by the charge on the ion C. the same as their atomic radii D. less than their atomic radii Correct Answer: Option D – less than their atomic radii Explanation In a neutral atom, the atomic and ionic radius is the...
by Sunday | Sep 14 | Chemistry JAMB
A. decreasing B. increasing C. constant D. neutral Correct Answer: Option C – decreasing Explanation In electro-valency, the oxidation number of the participating metal remains constant
by Sunday | Sep 14 | Chemistry JAMB
A. aniline B. xylene C. phenol D. toluene Correct Answer: Option D – toluene Explanation Toluene is used in making explosives. Phenol is used as a disinfectant and in the production of plastics. Aniline is used in the production of dyes and...