Class 12th Exam Chemistry VVI Objective Question p Block Elements Chapter
7. ‘p’ BLOCK ELEMENTS
1. Other than oxygen in Group 16 of the periodic table, the element found is :
(A) Sulphur
(B) Sodium
(C) Iron
(D) Nitrogen
| Answer :- (A) |
2. In the reaction N2 + 3H2 ⇔ 2NH3 + Q cals, if temperature increases, then :
(A) formation of NH3 increases
(B) formation of NH3 decreases
(C) no effect on the formation of ammonia
(D) None of these
| Answer :- (A) |
3. The formula of Sulphur di-oxide gas is :
(A) SO3
(B) SO2
(C) SO22+
(D) SO
| Answer :- (B) |
4. The symbol of tin is:
(A) Sn
(B) Tn
(C) Ti
(D) Fe
| Answer :- (A) |
5. The electronic configuration of carbon is :
(A) 1s2, 2s2, 2p2
(B) 1s2, 2s2, 2p1
(C) 1s2, 2s2, 2p3
(D) 1s2, 2s2, 2p4
| Answer :- (A) |
6. Formula of common salt is :
(A) NaCl
(B) KCI
(C) NaOH
(D) KCIO3
| Answer :- (A) |
7. The largest bond angle is found in which of the following?
(A) HO
(B) PH3
(C) H2S
(D) NH3
| Answer :- (D) |
8. Formula is tap water is :
(A) H2O
(B) H3O
(C) H3O⊕
(D) D2O
| Answer :- (A) |
9. Boron shows diagonal relation with :
(A) A1
(B) C
(C) Si
(D) Sn
| Answer :- (C) |
10. Catenation property is maximum in :
(A) phosphorus
(B) carbon
(C) sulphur
(D) zinc
| Answer :- (B) |
11. Which one of the following is an electrophilic reagent ?
(A) BF
(B) NH3
(C) H2O
(D) None of these
| Answer :- (A) |
12. Element found from sea water is :
(A) Magnesium
(B) Sodium
(C) Iodine
(D) none of these
| Answer :- (C) |
13. The shape of XeF4 is :
(A) tetrahedral
(B) square planar
(C) pyramidal
(D) linear
| Answer :- (B) |
14. Which one of the following is the strongest lewis acid ?
(A) BF3
(B) BCI3
(C) BBr3
(D) BI3
| Answer :- (B) |
15. Which one of the following does not form hydrogen bonding?
(A) NH3
(B) H2O
(C) HCI
(D) HF
| Answer :- (C) |
16. Main source of helium is :
(A) Air
(B) Radium
(C) Monazite
(D) Water
| Answer :- (C) |
17. Which one of the following element is liquid at normal temperature ?
(A) zinc
(B) mercury
(C) bromine
(D) water
| Answer :- (B) |
18. Which one of the following is least basic?
(A) NCI3
(B) NBr3
(C) NI3
(D) NF3
| Answer :- (C) |
19. H2SO4 is a/an :
(A) acid
(B) base
(D) salt
(C) alkali
| Answer :- (A) |
20. Modem periodic table is given by :
(A) Debonair
(B) Mendeleef
(C) Mendel
(D) None of these
| Answer :- (B) |
21. Which one of the following elements is found in free state in nature?
(A) Sodium
(B) Iron
(C) Zinc
(D) Gold
| Answer :- (D) |
22. Which of the following is the strongest oxidising agent?
(A) F2
(B) CL
(C) Cl2
(D) Br2
| Answer :- (A) |
23. Which of the following has maximum ionisation potential ?
(A) A1
(B) P
(C) Si
(D) Mg
| Answer :- (B) |
24. The number of P-o-P bonds in cyclic metaphosphoric acid is
(A) two
(B) zero
(C) three
(D) four
| Answer :- (A) |
25. Which of the following oxides is anhydride of nitrous acid ?
(A) N2O5
(B) NO2
(C) NO
(D) N2O4
| Answer :- (A) |
26. Atomicity of phosphorus is :
(A) one
(B) two
(C) three
(D) four
| Answer :- (D) |
27. The structure of white phosphorus is :
(A) square-planar
(B) pyramidal
(C) tetrahedral
(D) trigonal planar
| Answer :- (C) |
28. How many P-O-P bonds appear in cyclic meta phosphoric acid ?
(A) Four
(B) Three
(C) Two
(D) One
| Answer :- (B) |
29. Which of the following is a tetrabasic acid?
(A) Hypophosphorous acid
(B) Metaphosphoric acid
(C) Pyrophosphoric acid
(D) Orthophosphoric acid
| Answer :- (C) |
30. Which has the largest paramagnetic moment ?
(A) NO
(B) NO+
(C) O2
(D) O2–
| Answer :- (D) |
31. The hybridisation of sulphur in sulphur hexafluoride is :
(A) sp3d
(B) sp3d2
(C) sp3d3
(D) sp3
| Answer :- (B) |
32. Which metal becomes passive in concentrated HNO3 ?
(A) Cu
(B) Zn
(C) Al
(D) Pb
| Answer :- (D) |
33. Which has the largest bond angle in the following ?
(A) NH3
(B) H2S
(C) BF3
(D) CH4
| Answer :- (C) |
34. Sulphur molecule is:
(A) diatomic
(B) triatomic
(C) tetratomic
(D) octa-atomic
| Answer :- (D) |
35. Which compound has the largest dipole moment ?
(A) HF
(B) HCI
(C) HBr
(D) HI
| Answer :- (A) |
36. White and yellow phosphorous are :
(A) Allotropes
(B) Isomers
(C) Isobars
(D) Isotones
| Answer :- (A) |
37. Nitric acid is prepared by :
(A) Contact process
(B) Ostwald’s method
(C) Photosynthesis
(D) Haber’s process
| Answer :- (B) |
38. Second period of periodic table contains elements :
(A) 2
(B) 8
(C) 8
(D) 32
| Answer :- (B) |
39. The formula of Nitric acid is :
(A) HNO3
(B) H2N2O2
(C) HNO2
(D) HNO4
| Answer :- (A) |
40. The symbol of Helium is :
(A) He
(B) Hi
(C) Hm
(D) All
| Answer :- (A) |
41. PCl5 is a :
(A) Oxidising agent
(B) Reducing agent
(C) Oxidizing and reducing agent both
(D) None
| Answer :- (A) |
42. Which of the following gas is mono-atomic ?
(A) Chlorine
(B) Helium
(C) Nitrogen
(D) Oxygen
| Answer :- (A) |
43. Which of the following gas cannot be collected over water?
(A) O2
(B) H2S
(C) SO2
(D) N2
| Answer :- (C) |
44. Group I element of Periodic Table are known as :-
(A) Alkali metals
(B) Alkaline earth metals
(C) Inert gases
(D) None
| Answer :- (A) |
45. Oleum is composed of H2SO4 and which constituent ?
(A) SO2
(B) SO3
(C) H2S
(D) HSO4
| Answer :- (B) |
46. Which of the following elements does not show allotropy?
(A) Nitrogen
(B) Bismuth
(C) Antimony
(D) Arsenic
| Answer :- (B) |
47. Maximum covalency of nitrogen is ………
(A) 3
(B) 5
(C) 4
(D) 6
| Answer :- (B) |
48. Which of the following is an isoelectronic pair ?
(A) ICI2, CIO2
(B) BrO2–, BrF2+
(C) CIO2, BrF
(D) CN–, O3
| Answer :- (B) |
49. Which of the following is Tribasic?
(A) H3PO2
(B) H3PO3
(C) H4P2O7
(D) H3PO4
| Answer :- (D) |
50. Which is not a p-block elements ?
(A) Sn
(B) AI
(C) Mg
(D) Pb
| Answer :- (C) |
51. H2SO2 is a/an
(A) Acid
(B) Base
(C) Alkali
(D) All
| Answer :- (A) |
52. What is the oxidation state of sulphur is SF6
(A) +6
(B) -6
(C) +4
(D) -4
| Answer :- (A) |
53. The geometry of PCI5 is:
(A) Trigonal bipiramidal
(B) Octahedral
(C) Tetrahedral
(D) None
| Answer :- (A) |
54. The shape of a XeF2 is.
(A) Linear
(B) Triangular
(C) Angular
(D) Planar
| Answer :- (A) |
55. Which of the following is not a p-block elements ?
(A) Sn
(B) P
(C) S
(D) Ba
| Answer :- (D) |
56. Which among the following is strongest acid ?
(A) HF
(B) HCI
(C) HBr
(D) HI
| Answer :- (D) |
57. The molecule which has zero dipole moment is :
(A) NF3
(B) BF3
(C) CIO3
(D) CH2Cl2
| Answer :- (B) |
58. Most stable oxidation state of bismuth is :
(A) + 3
(B) +5
(C) +3 and + 5 both
(D) None
| Answer :- (A) |
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