1. Oxidation is the process of adding oxygen and removing

2. Neil Bhor mainly concentrated upon

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

4. In a group the elements have almost same

5. The different forms of element are called

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

7. Chemical reactions involve migration of

8. The Atom is a Greek word

9. The air is  a

10. The electro planting prevents

11. The KCI has the type of bonding

12. Steel is the alloy of

13. The Atoms can exist freely in nature

14. Corrosion of metals is a .................reaction

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

16. Chemistry is the branch of science that deals with

17. Manometer is used for the determination of

18. The matter exists in

19. The most electronegative element in periodic table is

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