Chemistry - Fill in the Blanks type questions on Fundamental Concepts Part -1

1. 1 mole of a gas at S.T.P occupies a volume of __________.

2. A gas occupying a volume of 22.4 dm3 at S.T.P contains __________ molecules.

3. A formula, which gives the relative number of atoms in the molecule of a compound, is called __________.

4. A formula which gives the actual number of all kinds of atoms present in the molecule of compound is termed as __________.

5. The chemical formula that not only gives the actual number of atoms but also shows the arrangement of different atoms present in the molecule is called __________.

6. Atomic weight or molecular weight expressed in grams is known as __________.

7. 2 moles of H2O contain __________ grams and __________ number of molecules.

8. Any thing that occupies space and has __________ is called matter.

9. Volume of one __________ mole of a gas at S.T.P is 22.4 cubic feet.

10. A ton mole of iron is equal to __________ tons.

11. The force with which the earth attracts a body is called the __________ of the body.

12. A pure substance contains __________ kind of molecules.

13. The smallest indivisible particle of matter is called __________.

14. The atomic number is equal to the number of __________ in nucleus.

15. The atomic mass is the total number of protons and __________ in an atom of the element.

16. The average weight of atoms of an element as compared to the weight of one atom of __________ is called the atomic mass.

17. 1.0007 contains __________ significant figures.


18. __________ means that the readings and measurements obtained in different experiments are very close to each other.

19. __________ means that the results obtained in different experiments are very close to the accepted values.