1. Chemistry is the branch of science that deals with

2. In a group the elements have almost same

3. The KCI has the type of bonding

4. The air is  a

5. Oxidation is the process of adding oxygen and removing

6. The most electronegative element in periodic table is

7. The different forms of element are called

8. The Atom is a Greek word

9. Manometer is used for the determination of

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

11. Neil Bhor mainly concentrated upon

12. The matter exists in

13. Steel is the alloy of

14. Chemical reactions involve migration of

15. Corrosion of metals is a .................reaction

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

17. The Atoms can exist freely in nature

18. The electro planting prevents

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

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