by Sunday | Dec 27 | Chemistry JAMB
A. iron(ii)Sulphide B. tin(ii)sulphide C. Zinc Sulphide D. lead(iv) Sulphide Correct Answer: Option C – Zinc Sulphide Explanation ZnS (Zinc Sulfide) screen was used because it emits a flash of light when struck by an alpha particle. This is a phenomenon called...
by Sunday | Dec 27 | Chemistry JAMB
A. 18 B. 20 C. 37 D. 17 Correct Answer: Option B = 20 Explanation The mass number = number of neutrons + atomic number. number of neutrons = The mass number – atomic number. number of neutrons = 37 – 17 =...
by Sunday | Dec 27 | Chemistry JAMB
A. phosphorus B. sulphur C. carbon D. chlorine Correct Answer: Option C – carbon Explanation The oxides which neither react with acids nor react with bases are known as neutral oxides. Carbon monoxide neither reacts with acids nor reacts with bases. Thus, carbon...
by Sunday | Dec 27 | Chemistry JAMB
A. composition B. dissociating ability C. stability to heat D. precipitating ability Correct Answer: Option C – stability to heat Explanation The method used to prepare a salt depend on: the solubility of the salt in water. the heat stability of the...
by Sunday | Dec 27 | Chemistry JAMB
A. chromium(vi)oxide B. iron(iii)oxide C. copper(i)oxide D. vanadium(v)oxide Correct Answer: Option D = vanadium(v)oxide Explanation During the Contact Process for manufacturing sulfuric acid, sulfur dioxide has to be converted into sulfur trioxide, which is done by...
by Sunday | Dec 27 | Chemistry JAMB
A. 3-chloro-3-methylbutane B. 2,2,-dichloro-3-methylbutane C. 3-methylchlorobutane D. 2-chloro-2-methylbutane Correct Answer: Option D – 2-chloro-2-methylbutane Explanation Straight-chain hydrocarbon molecules that contain only singly-bonded carbons are called...
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