1. Chemical reactions involve migration of

2. The air is  a

3. The electro planting prevents

4. Oxidation is the process of adding oxygen and removing

5. The Atom is a Greek word

6. The matter exists in

7. Steel is the alloy of

8. Manometer is used for the determination of

9. In a group the elements have almost same

10. When a covalent bound is formed  by two electron pair termed as a

11. The most electronegative element in periodic table is

12. Corrosion of metals is a .................reaction

13. When a covalent bound is formed  by a single electron pair termed as a

14. Neil Bhor mainly concentrated upon

15. The KCI has the type of bonding

16. The sum of masses of all atoms in a molecule is called

17. The different forms of element are called

18. The Atoms can exist freely in nature

19. Chemistry is the branch of science that deals with

20. ..............is homogenous mixture of two or more substances