1. Manometer is used for the determination of

2. The air is  a

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

4. Steel is the alloy of

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

6. Chemical reactions involve migration of

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

8. The electro planting prevents

9. The matter exists in

10. In a group the elements have almost same

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

12. Oxidation is the process of adding oxygen and removing

13. Corrosion of metals is a .................reaction

14. The Atoms can exist freely in nature

15. The different forms of element are called

16. Neil Bhor mainly concentrated upon

17. The most electronegative element in periodic table is

18. The KCI has the type of bonding

19. The Atom is a Greek word

20. Chemistry is the branch of science that deals with