Q: no: 2: Short answer questions. /12*2=241) Write two difference between Ions and Free Radicals.2) Define empirical formula with an example.3) Define atomic mass unit. Why is it needed?4) Why is an iron grill painted frequently?5) What is the nature of electrode used in electrolyzing of chromium?6) Where do the electrons flow from Zn electrode… Continue reading Previous paper class 9th(Chemistry)