Question 1. The hybridisation of sulphur in sulphur hexafluoride is
Question 2. On heating KCIO, we get
Question 3. Which of the following is not correctly matched?
Question 4. 18 H2S is more acidic than H2O because
Question 5. Among the 15th group elements, as we move from nitrogen to bismuth, the pentavalency becomes less pronounced and trivalency becomes more pronounced due to
Question 6. Which of the following statements is not correct for nitrogen?
Question 7. Collectively the elements of group 15 are called –
Question 8. Ionic radii (in Å) of As3+, Sb3+ and Bi3+ follow the order
Question 9. Which one of the following elements is most metallic ?
Question 10. Which of the follow group 15 element forms metallic bonds in elemental state ?
Question 11. The three important oxidation states of phosphorus are
Question 12. Which of the following statement is incorrect for group 15 elements ?
Question 13. Nitrogen is relatively inactive element because
Question 14. Which of the following has the highest pπ – pπ bonding tendency ?
Question 15. Pick out the wrong statement.
Question 16. Nitrogen forms N2, but phosphorus is converted into P4 from P, the reason is
Question 17. What causes nitrogen to be chemically inert ?
Question 18. Pentavalence in phosphorus is more stable when compared to that of nitrogen even though they belong to same group. This is due to
Question 19. Which one has the lowest boiling point ?
Question 20. Boron shows diagonal relation with
Question 21. Catenation property is maximum in
Question 22. Which one of the following is an electrophilic reagent?
Question23. Element found from sea water is
Question 24. The shape of XeF4 is
Question 25. Which one of the following is the strongest lewis acid?
Question 26. Which one of the following does not form hydrogen bonding?
Question 27. Main source of helium is
Question 28. Which one of the following dement is liquid at normal temperature?
Question 29. Which one of the following is least basic?
Question 30. H2SO4 is a/an
Question 31. Modern periodic table is given by
Question 32. Which one of the following elements is found in free state in nature?
Question 33. Which of the following is the strongest oxidising agent?
Question 34. Which of the following has maximum ionisation potential?
Question 35. The number of P-O-P bonds in cyclic metaphosphoric acid is
Question 36 Which of the following oxides is an hydride of nitrous acid ?
Question 37. Which oxide of nitrogen is obtained on heating ammonium nitrate at 250°C ?
Question 38. Atomicity of phosphorus is
Question 39. The structure of white phosphorus is
Question 40. PCl3 on hydrolysis gives
Question41. Arrange the following in decreasing Lewis acid strength -PF3, PCI3, PBr3, Pl3
Question 42. How many P-O-P bonds appear in cyclic meta-phosphoric acid?
Question 43. Which of the following is a tetrabasic acid?
Question 44. Which of the following is not correctly matched?
Question 45. Arrange the following hydrides of group 16 elements in order of increasing stability
Question 46 The boiling points of hydrides of group 16 are in the order
Question 47 In the manufacture of sulphuric acid by contact process Tyndall box is used to
Question 48 Fluorine differs from rest of the halogens in some of its properties. This is due to
Question 49 Boron shows diagonal relation with
Question 50. Catenation property is maximum in