Solved Important Mcqs of Chemistry Class 9th Ch-1
1).Now a days number discoverd elements are.. Ans:123 2).The things that occupy space and have mass is known as.. Ans:matter 3).Oxygen is present in ocean is.. Ans:86% 4).Which elements are present in liquid state.. Ans: Bromine(Br) and Mercury(Hg) 5).The numbers of metals are present in periodic table are.. Ans:80% 6).The symbol of calcium is Ans:ca … Read more