Abuja — The West African Examinations Council (WAEC) has postponed the full implementation of the computer-based test (CBT) format for the 2026 Senior School Certificate Examination (SSCE) until 2027, according to a statement released at the council’s 63rd annual meeting in Umuahia, Abia State. Hajia Binta Abdulkadir, Chairman of WAEC’s Nigeria National Committee, explained that the 2026 May/June edition will now serve as a pilot phase — allowing candidates to sit for either the traditional paper-and-pen test or the digital format. She emphasized that no student will be disadvantaged by the transition. The delay follows widespread concern over the readiness of many schools, particularly in rural areas, for full digital exams. Many institutions lack adequate computers, reliable electricity, internet connectivity, and trained personnel—factors WAEC and the Federal Ministry of Education say are essential for a successful rollout. To facilitate the switch, WAEC co...
Qualitative analysis is the type of chemical analysis which its objective is to identify the ions, atoms or functional groups in an unknown substance. To identify the ions, the chemical properties of the unknown substance are determined by carefully reacting the unknown substance with different reagents. By defining what the particular reaction will be if a particular ion is present, the ions that are presence in the solution of the unknown substance can be identified. For example, adding barium chloride in a solution of a compound containing tetraoxosulphate (VI), trioxosulphate (IV) or trioxocarbonate (IV) gives a white precipitate. The precipitate from the last two will dissolve in dilute acid to produce sulphur (IV) oxide and carbon (IV) oxide respectively. These reactions help to differentiate between trioxocarbonate (IV) and trioxosulphate (IV) radicals. Another method employed in qualitative analysis is checking the solubility ...