by Sunday | Sep 15 | Chemistry JAMB
A. water B. mercury C. paraffin D. phenol Correct Answer: Option C – paraffin Explanation Na is kept under kerosene (paraffin) to avoid reactivity with air. Paraffin is also known as Kerosene. Na(sodium) is kept in kerosene to prevent it from coming in contact...
by Sunday | Sep 15 | Chemistry JAMB
A. 2.536 B. 1.623 C. 4.736 D. 0.394 Correct Answer: Option A – 2.536 Explanation For an ideal gas PV = nRT Amount in moles = n Volume v = 10.5dm³ Pressure P = 6atm Temperature T = 30°C + 273 = 303k R, Gas constant = 0.082 atmdm³k-¹ mol Recall from ideal gas...
by Sunday | Sep 15 | Chemistry JAMB
A. Reforming B. Polymerization C. Distillation D. Cracking Correct Answer: Option D – Cracking Explanation Ethene is produced from cracking which involves breaking up large hydrocarbon molecules into smaller and more useful bits. This is achieved by using high...
by Sunday | Sep 15 | Chemistry JAMB
A. positive ion B. neutral atom of a metal C. neutral atom of a non-metal D. negative ion Correct Answer: Option D – negative ion Explanation protons = 9 neutrons = 10 electrons = 10 Electronic configuration = 2, 8 Ground state Electronic configuration=2, 7 It...
by Sunday | Sep 15 | Chemistry JAMB
A. further heating B. adding concentrated H2SO4 C. cooling the acid solution with cold water D. bubbling air through the acid solution Correct Answer: Option D – bubbling air through the acid solution Explanation Bubbling of air through the acid solution removes...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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