1. When the solution of a sample was heated and passed with hydrogen sulphide gas. A solid black compound formed. The chemical reaction involved is represented by one of the following
A. Pb + S2- PbS B. Fe + S2- FeS
*C. Cu + S2- CuS D. Cd + S2- CdS
2. If a brown precipitate readily dissolved in HCl and added with KCN to give a blood red colour, then the cation present is
A. Cr3+ B. Fe2+ *C. Fe3+ D. Cd3+
Consults, E. (2022). CHM 116 CBT Questions.. Afribary. Retrieved from https://afribary.com/works/chm-116-cbt-questions
Consults, Education "CHM 116 CBT Questions." Afribary. Afribary, 09 Jun. 2022, https://afribary.com/works/chm-116-cbt-questions. Accessed 06 May. 2024.
Consults, Education . "CHM 116 CBT Questions.". Afribary, Afribary, 09 Jun. 2022. Web. 06 May. 2024. < https://afribary.com/works/chm-116-cbt-questions >.
Consults, Education . "CHM 116 CBT Questions." Afribary (2022). Accessed May 06, 2024. https://afribary.com/works/chm-116-cbt-questions