by Sunday | Mar 21 | Chemistry JAMB
A. He B. Ne C. Ar D. Xe Correct Answer: Option C = Ar Explanation The most abundant naturally occurring gas is Nitrogen (N2), which makes up about 78% of air. Oxygen (O2) is the second most abundant gas at about 21%. The inert gas Argon (Ar) is the third most abundant...
by Sunday | Mar 21 | Chemistry JAMB
A. 5 B. 6 C. 3 D. 4 Correct Answer: Option A = 5 Explanation One mole of carbon dioxide molecules has a mass of 44.01 g, : 5 mole of carbon dioxide molecules has a mass of 220g
by Sunday | Mar 21 | Chemistry JAMB
A. 1.00gram B. 4.00gram C. 8.00gram D. 6.00gram Correct Answer: Option B – 4.00gram Explanation Avogadro’s number is an absolute number: there are 6.022×1023 elementary entities in 1 mole. helium has a molar mass of 4.0 grams per mole. So one mole of...
by Sunday | Mar 21 | Chemistry JAMB
A. Always less than its atomic number B. The sum of the number of protons and neutrons present in the nucleus C. Always more than the atomic weight D. A fraction Correct Answer: Option B – The sum of the number of protons and neutrons present in the nucleus...
by Sunday | Mar 21 | Chemistry JAMB
A. viscosity B. floatation C. elasticity D. surface tension Correct Answer: Option D – surface tension Explanation Since the surface tension forces become smaller as the distance between water molecules increases, the intervening soap molecules decrease the...
by Sunday | Mar 21 | Chemistry JAMB
A. its high electro negativity B. small size of fluorine atom C. availability of D-orbitals D. strong f-f bond Correct Answer: Option A – its high electro negativity Explanation fluorine (F), most reactive chemical element and the lightest member of the halogen...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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