by Sunday | Sep 14 | Chemistry JAMB
A. RCHO B. R2CO C. RCOOH D. RCOOR Correct Answer: Option B – R2CO Explanation Alkanones also is known as ketones have the general formula R2CO
by Sunday | Sep 14 | Chemistry JAMB
A. ΔH is positive and TΔ S is zero B. ΔH is positive and T Δ S is negative C. ΔH is negative and TΔ S is zero D. ΔH is zero and T Δ S is positive Correct Answer: Option D – ΔH is zero and T Δ S is positive Explanation The definition of enthalpy change is ΔH = ΔU...
by Sunday | Sep 14 | Chemistry JAMB
A. small sizes B. large sizes C. different sizes D. the same size Correct Answer: Option C – different sizes Explanation Sieving is a simple and convenient technique of separating particles of different sizes.
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...