Chemistry Past Questions and Answers

Which of the following happens during the electrolysis of molten sodium chloride?

Crude petroleum pollutant usually seen on some Nigerian creeks and waterways can be dispersed or removed by

An element is electronegative if

Solutions X, Y, and Z have PH values 3.0. 5. 0 and 9. 0 respectively. Which of the following statements is correct?

In the reactions<br/>(I) H<sub style='font-size: smaller;'>2</sub> (g) + 1/2O<sub style='font-size: smaller;'>2</sub>(g) → H<sub style='font-size: smaller;'>2</sub>O(l); ∆H = -286 KJ<br/>(II) C(s) + O<sub style='font-size: smaller;'>2</sub>g) → CO<sub style='font-size: smaller;'>2</sub> (g); ∆H = -406 KJ the equations imply that