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The p-Block Elements
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Bihar Board
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Class 12th
»
English Medium
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Science
»
Chemistry
» Part-1 » Unit 7: The p-Block Elements
Objective Questions (MCQs)
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The p-Block Elements
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Bihar Board
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Class 12th
»
English Medium
»
Science
»
Chemistry
» Part-1 » Unit 7: The p-Block Elements
Objective Questions (MCQs)
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Multiple Choice
ID- 13067
BSEB, 2020 (A)
1. Other than oxygen in Group 16 of the periodic table, the element found is:
(A) Sulphur
(B) Sodium
(C) Iron
(D) Nitrogen
Multiple Choice
ID- 13068
BSEB, 2020 (A)
2. In the reaction N
2
+ 3H
2
⇄ 2NH
3
+ Q cals, if temperature increases, then:
(A) formation of NH
3
increases
(B) formation of NH
3
decreases
(C) no effect on the formation of ammonia
(D) None of these
Multiple Choice
ID- 13216
BSEB, 2019 (C)
3. The symbol of tin is:
(A) Sn
(B) Tn
(C) Ti
(D) Fe
Multiple Choice
ID- 13217
BSEB, 2019 (C)
4. The electronic configuration of carbon is:
(A) 1s
2
, 2s
2
, 2p
2
(B) 1s
2
, 2s
2
, 2p
1
(C) 1s
2
, 2s
2
, 2p
3
(D) 1s
2
, 2s
2
2p
4
Multiple Choice
ID- 13218
BSEB, 2019 (C)
5. Formula of common salt is:
(A) NaCI
(B) KCI
(C) NaOH
(D) KCIO
3
Multiple Choice
ID- 13219
BSEB, 2019 (C)
6. The largest bond angle is found in which of the following?
(A) H
2
O
(B) PH
3
(C) H
2
S
(D) NH
3
Multiple Choice
ID- 13220
BSEB, 2019 (C)
7. Formula of tap water is:
(A) H
2
O
(B) H
3
O
(C) H
3
O
⊕
(D) D
2
O
Multiple Choice
ID- 13221
BSEB, 2016
8. Boron shows diagonal relation with:
(A) Al
(B) C
(C) Si
(D) Sn
Multiple Choice
ID- 13222
BSEB, 2016
9. Caternation property is maximum in:
(A) phosphorus
(B) carbon
(C) sulphur
(D) zinc
Multiple Choice
ID- 13223
BSEB, 2016
10. Which one of the following is an electrophilic reagent?
(A) BF
3
(B) NH
3
(C) H
2
O
(D) None of these
Multiple Choice
ID- 13224
BSEB, 2016
11. Element found from sea water is:
(A) Magnesium
(B) Sodium
(C) Iodine
(D) none of these
Multiple Choice
ID- 13225
BSEB, 2015
12. The shape of XeF
4
is:
(A) tetrahedral
(B) square planar
(C) pyramidal
(D) linear
Multiple Choice
ID- 13226
BSEB, 2015, 2016 (C), 2018 (C)
13. Which one of the following is the strongest lewis acid?
(A) BF
3
(B) BCI
3
(C) BBr
3
(D) BI
3
Multiple Choice
ID- 13372
BSEB, 2013, 2015
14. Which one of the following does not from hydrogen bonding?
(A) NH
3
(B) H
2
O
(C) HCI
(D) HF
Multiple Choice
ID- 13373
15. Main source of helium is:
(A) Air
(B) Radium
(C) Monazite
(D) Water
Multiple Choice
ID- 13374
BSEB, 2015
16. Which one of the following element is liquid at normal temperature?
(A) zinc
(B) mercury
(C) bromine
(D) water
Multiple Choice
ID- 13375
BSEB, 2015
17. Which one of the following is least basic?
(A) NCI
3
(B) NBr
3
(C) NI
3
(D) NF
3
Multiple Choice
ID- 13376
BSEB, 2015, 2019 (A)
18. H
2
SO
4
is a/an:
(A) acid
(B) base
(C) alkali
(D) salt
Multiple Choice
ID- 13377
BSEB, 2015
19. Modern periodic table is given by:
(A) Debonair
(B) Mendeleef
(C) Mendel
(D) None of these
Multiple Choice
ID- 13378
BSEB, 2015
20. Which one of the following elements is found in free state in nature?
(A) Sodium
(B) Iron
(C) Zinc
(D) Gold
Multiple Choice
ID- 13379
BSEB, 2015
21. Which of the following has maximum ionisation potential?
(A) Al
(B) P
(C) Si
(D) Mg
Multiple Choice
ID- 13380
BSEB, 2015
22. The number of p-o-p bonds in cyclic metaphosphoric acid is:
(A) two
(B) zero
(C) three
(D) four
Multiple Choice
ID- 13381
23. Which of these following oxides is anhydride of nitrous acid?
(A) N
2
O
3
(B) NO
2
(C) NO
(D) N
2
O
4
Multiple Choice
ID- 13382
24. Atomicity of phosphorus is:
(A) one
(B) two
(C) three
(D) four
Multiple Choice
ID- 13383
25. The structure of white phosphorus is:
(A) square-planer
(B) pyramidal
(C) tetrahedral
(D) trigonal planar
Multiple Choice
ID- 13384
BSEB, 2018 (C)
26. Na
2
S
2
O
3
+ I
2
→ NaI, in this reaction [Y] is:
(A) Na
2
S
(B) Na
2
S
4
O
6
(C) Na
2
SO
4
(D) Na
2
S
4
O
8
Multiple Choice
ID- 13385
BSEB, 2017 (A)
27. Which of the following is a tetrabasic acid?
(A) Hypophosphorous acid (H
3
PO
2
)
(B) Metaphosphoric acid (HPO
3
)
n
(C) Pyrophosphoric acid (H
4
P
2
O
7
)
(D) Orthophosphoric acid (H
3
PO
4
)
Multiple Choice
ID- 13386
28. The hybridisation of sulphur in sulphur hexafluoride is:
(A) sp
3
d
(B) sp
3
d
2
(C) sp
3
d
3
(D) sp
3
Multiple Choice
ID- 13387
BSEB, 2018 (C)
29. Which metal becomes passive in concentrated HNO
3
?
(A) Cu
(B) Zn
(C) Al
(D) Pb
Multiple Choice
ID- 13388
BSEB, 2018 (C)
30. Which has the largest bond angle in the following?
(A) NH
3
(B) H
2
S
(C) BF
3
(D) CH
4
Multiple Choice
ID- 13389
31. Sulphur molecule is:
(A) diatomic
(B) triatomic
(C) tetratomic
(D) octa-atomic
Multiple Choice
ID- 13390
BSEB, 2021 (A)
32. The elements of group 16 are known as:
(A) Halogens
(B) Chalcogens
(C) Transition elements
(D) Noble gases
Multiple Choice
ID- 13391
BSEB, 2021 (A)
33. Chlorine reacts with excess of ammonia to form:
(A) NH
4
CI
(B) N
2
+ HCI
(C) N
2
+ NH
4
CI
(D) N
2
+ NCI
3
Multiple Choice
ID- 13392
BSEB, 2018 (C)
34. Which compound has the largest dipole moment?
(A) HF
(B) HCI
(C) HBr
(D) HI
Multiple Choice
ID- 13534
BSEB, 2019 (A), 2020 (A)
35. White and yellow phosphorus are:
(A) Allotropes
(B) Isomers
(C) Isobars
(D) Isotones
Multiple Choice
ID- 13535
BSEB, 2019 (A)
36. Nitric acid is prepared by:
(A) Contact process
(B) Ostwald's method
(C) Photosynthesis
(D) Haber's process
Multiple Choice
ID- 13536
BSEB, 2019 (A)
37. Second period of periodic table contains elements:
(A) 2
(B) 8
(C) 7
(D) 32
Multiple Choice
ID- 13537
BSEB, 2019 (A), 2019 (C)
38. The formula of Nitric acid is:
(A) HNO
3
(B) H
2
N
2
O
2
(C) HNO
2
(D) HNO
4
Multiple Choice
ID- 13538
BSEB, 2019 (A)
39. The symbol of Helium is:
(A) He
(B) Hi
(C) Hm
(D) All
Multiple Choice
ID- 13539
BSEB, 2019 (A)
40. PCI
5
is a:
(A) Oxidising agent
(B) Reducing agent
(C) Oxidizing and reducing agent both
(D) None
Multiple Choice
ID- 13540
41. Which of the following elements can be involved in
pπ – dπ
bonding?
(A) Carbon
(B) Nitrogen
(C) Phosphorus
(D) Boron
Multiple Choice
ID- 13541
BSEB, 2019 (A)
42. Which of the following gas is mono-atomic?
(A) Chlorine
(B) Helium
(C) Nitrogen
(D) Oxygen
Multiple Choice
ID- 13542
BSEB, 2019 (A)
43. Which of the following gas cannot be collected over water?
(A) O
2
(B) H
2
S
(C) SO
2
(D) N
2
Multiple Choice
ID- 13543
BSEB, 2019 (A)
44. Group I element of Periodic Table is known as:
(A) Alkali metals
(B) Alkaline earth metals
(C) Inert gases
(D) None
Multiple Choice
ID- 13544
BSEB, 2019 (A)
45. Oleum is composed of H
2
SO
4
and which constituent?
(A) SO
2
(B) SO
3
(C) H
2
S
(D) HSO
4
–
Multiple Choice
ID- 13545
46. Which of the following elements does not show allotropy?
(A) Nitrogen
(B) Bismuth
(C) Antimony
(D) Arsenic
Multiple Choice
ID- 13546
47. Maximum convalency of nitrogen is ..........
(A) 3
(B) 5
(C) 4
(D) 6
Multiple Choice
ID- 13547
BSEB, 2021 (A)
48. Photographic film plate has an essential ingredient of:
(A) silver nitrate
(B) silver bromide
(C) sodium chloride
(D) oleic acid
Multiple Choice
ID- 13548
BSEB, 2021 (A)
49. Which of the following bonds is the strongest?
(A) F – F
(B) Cl – Cl
(C) I – I
(D) Br – Br
Multiple Choice
ID- 13549
BSEB, 2021 (A)
50. The substance which exhibits paramagnetism is:
(A) H
2
O
(B) O
2
(C) NaCI
(D) C
6
H
6
Multiple Choice
ID- 13550
BSEB, 2021 (A)
51. The strongest acid is:
(A) HClO
4
(B) HClO
3
(C) HClO
2
(D) HClO
Multiple Choice
ID- 13551
BSEB, 2017 (A)
52. Which of the following is Tribasic?
(A) H
3
PO
2
(B) H
3
PO
3
(C) H
4
P
2
O
7
(D) H
3
PO
4
Multiple Choice
ID- 13552
BSEB, 2016 (C)
53. Which is not a
p
-block elements?
(A) Sn
(B) Al
(C) Mg
(D) Pb
Multiple Choice
ID- 13553
BSEB, 2016 (C)
54. H
2
SO
2
is a/an—
(A) Acid
(B) Base
(C) Alkali
(D) All
Multiple Choice
ID- 13554
BSEB, 2016 (C)
55. What is the oxidation state of sulphur is SF
6
(A) +6
(B) –6
(C) +4
(D) –4
Multiple Choice
ID- 13555
BSEB, 2016 (C)
56. The geometry of PCl
5
is:
(A) Trigonal bipiramidal
(B) Octahedral
(C) Tetrahedral
(D) None
Multiple Choice
ID- 13556
BSEB, 2016 (C)
57. The shape of a XeF
2
is.
(A) Linear
(B) Triangular
(C) Angular
(D) Planar
Multiple Choice
ID- 13557
BSEB, 2017 (C)
58. Which of the following is not a
p
–block elements?
(A) Sn
(B) P
(C) S
(D) Ba
Multiple Choice
ID- 13558
BSEB, 2017 (C)
59. Which among the following is strongest acid?
(A) HF
(B) HCl
(C) HBr
(D) HI
Multiple Choice
ID- 13559
BSEB, 2018 (A)
60. Number of σ and π bonds in C
2
molecule is/are:
(A) 1σ and 1π
(B) 1σ and 2π
(C) 2π only
(D) 1σ and 3π
Multiple Choice
ID- 13560
BSEB, 2018 (A)
61. The molecule which has zero dipole moment is:
(A) NF
3
(B) BF
3
(C) ClO
3
(D) CH
2
Cl
2
Multiple Choice
ID- 13561
BSEB, 2018 (A)
62. The correct order of equivalent conductance at infinite dilution of LiCl, NaCl and KCI is:
(A) LiCl > NaCI > KCI
(B) KCI > NaCI > LiCl
(C) NaCI > KCI > LiCl
(D) LiCl > KCI > NaCl
Multiple Choice
ID- 13562
BSEB, 2018 (A)
63. Most stable oxidation state of bismuth is:
(A) + 3
(B) + 5
(C) + 3 and + 5 both
(D) None
Multiple Choice
ID- 13563
BSEB, 2020 (A)
64. Formula of oleum is:
(A) H
2
S
2
O
7
(B) H
2
SO
4
(C) H
2
SO
3
(D) H
2
SO
5
Multiple Choice
ID- 13726
BSEB, 2015, 2016, 2020 (A)
65. Which of the following is the strongest oxidising agent?
(A) F
2
(B) Cl
2
(C) I
2
(D) Br
2
Multiple Choice
ID- 14561
BSEB, 2019 (C)
66. The formula of Sulphur di-oxide gas is:
(A) $\ce{SO3}$
(B) $\ce{SO2}$
(C) $\ce{SO^2+_2}$
(D) $\ce{SO^2–_3}$
Multiple Choice
ID- 14562
BSEB, 2021 (A)
67. Which of the following has $\ce{pπ – dπ}$ bond?
(A) $\ce{NO^–_3}$
(B) $\ce{CO^2–_3}$
(C) $\ce{BO^2–_3}$
(D) $\ce{SO^2–_3}$
Multiple Choice
ID- 14563
BSEB, 2018 (C)
68. Which has the largest paramagnetic moment?
(A) $\ce{NO}$
(B) $\ce{NO^+}$
(C) $\ce{O2}$
(D) $\ce{O^–_2}$