primarly valency in cuprammonium sulphate is satisfied by sulphate ion

stick to ur ncert text book......nothin else frm the text book will b askd...b hardworkin........all d best

As Business Studies is a theory paper. SO you need to learn the headings of the point rest you can made your self.

Its you and only you that have to decide why do you want to do an MBA.See the answer is very simple but then again you dont want to mug anyone's answer and spell it out in an Interview. Do you ?? First Decide your priorities in life,what you want , how you plan to achieve it,what are the strategies that you have to make. Best of Luck for the framing process.