6.Calculate the number of moles of magnesium present in a magnesium ribbon weighing 12 gm. Molar atomic mass of Magnesium is 24 gm/mol. 7.Write postulates of Daltion's atomic theory (at least three).

In the table below, competency-based questions of all the chapters of Class 9 Science have been provided for your reference. These will add to your knowledge and provide you with an understanding of ...