XII Chemistry Online Mcqs - All Chapters - Online Mcqs Test - 11Chemistry Online Mcqs Test for class 12, Second Year, According to Karachi Board 300 Online Multiple Choice Questions
Q1. In which compound oxygen has a positive oxidation state?
Q2. In the electrolytic process for obtaining chlorine gas from brine the cell is called
Q10. Transition elements exhibit variable valencies because they release electrons from the following orbits