12th Chemistry In English

Class 12th Exam Chemistry VVI Objective Question p Block Elements Chapter


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, 2p

(D) 1s2, 2s2, 2p4

Answer :- (A)

6. Formula of common salt is : 

(A) NaCl

(B) KCI 

(C) NaOH 


Answer :- (A)

7. The largest bond angle is found in which of the following? 

(A) HO 

(B) PH3

(C) H2

(D) NH3

Answer :- (D)

8. Formula is tap water is : 

(A) H2

(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) H2

(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) N2O

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) sp3

(B) sp3d2

(C) sp3d

(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) CH

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 


(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


(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 


(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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