Fill in the Blanks type exam questions in Chemistry

1. The property of a crystal, which is different in different directions, is called __________.

2. 0.00051 contains __________ significant figures.

3. The oxidation number of oxygen in OF2 is __________.

4. The volume of 1 gm of hydrogen gas at S.T.P is __________.

5. The oxidation number Mn in KMnO4 is __________.

6. The product of ionic concentration in a saturated solution is called __________.

7. 16 gm of oxygen at S.T.P occupies a volume of __________ dm3.

8. The shape of the orbital for which l = 0 is __________.

9. The radius of Cl-1 is __________ than the radius of Cl0.

10. Sp2 hybridization is also known as __________.

11. The value of 1 Debye is __________.

12. The reactions catalyzed by sunlight are called __________.

13. The blue colour of CuSO4 is due to the presence of __________.

14. The force of attraction between the liquid molecules and the surface of container is called __________.

15. The heat of neutralization of a strong acid and a strong base is __________.

16. C º C triple bond is __________. C = C double bond length.

17. The ions having the same electronic configuration are called iso electronic.

18. On heating, if a solid changes directly into vapours without changing into the liquid state, the phenomenon is called __________.

19. Each orbital in an atom can be completely described by __________.

20. In a molecule of alkene, __________ restricts the rotation of the group of atoms at either end of the molecule.

21. Density, refractive index and vapour pressure are __________ properties.

22. The addition of HCl to H2 solution __________ the ionization of H2S.

23. The reaction of cation or anion (or both) with water so as to change its __________ is known as Hydrolysis.

24. A reaction with higher activation energy will start at __________ temperature.

25. 6.02 x 1023 has __________ significant figures.

26. The internal resistance in the flow of liquid is called __________.

27. A catalyst increases the velocity of a reaction but decreases the __________.


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