CHAPTER # 4
Group V and VI Elements
1. Out of all the elements of group VA the highest
ionization energy is possessed.
(A) N (B) P
(C) Sb (D) Bi
2. In group VA elements the most
electronegative elements is.
(A) Sb (B) N
(C) P (D) As
3. Oxidation of NO in air produced.
(A) NO2 (B) N2O3
(C) N2O4 (D) N2O5
4. The brown gas is formed when metal reduces
HNO3
(A) N2O5 (B) N2O
(C) NO2 (D) NO
5. Laughing gas is chemically
(A) NO (B) N2O
(C) NO2 (D) N2O4
6. Out of all the elements of group IVA the highest melting and boiling point is shown by
the elements;
(A) Te (B) Se
(C) S (D) Pb
7. SO3 is not absorbed in water directly to form H2SO4 because.
\
(A) The reaction does not go to completion
(B) The reaction is quite slow
(C) The reaction is exothermic
(D) SO3 is insoluble in water
8. Which catalyst is used in contact process?
(A) Fe2O3 (B) V2O5
(C) SO3 (D) Ag2O
9. Which of the following specie has the maximum number of unpaired electrons.
(A) O2 (B) O2+
(C) O2- (D) O2-2
10. Nitrogen and phosphorus of group VA show the typical properties of
(A) Metals (B) Non-Metals
(C) Both of the above (D) None of the above
11. Arsenic and antimony are
(A) Metals (B) Non-Metal
(C) Metalloids (D) None of the above
12. The common valencies of the group VA
elements are
(A) Two to three (B) Three and five
(C) One and five (D) Two and four
13. Nitrogen is present in free state in air as a major constituent about.
(A) 58% (B) 38%
(C) 70% (D) 78%
14. Common oxides of nitrogen are
(A) N2O, NO and NO2
(B) NO, NO2
(C) N2O, NO2
(D) N2O, NO, NO2, N2O3 & N2O5
15. Di-Nitrogen oxide is a colourless gas.
(A) With a faint pleasant smell and a sweetish
taste.
(B) With unpleasant smell and bitter taste.
(C) With pleasant smell and bitter taste.
(D) With unpleasant smell and sweetish
16. Nitric acid is used for.
(A) Making varnishes and Organic dyes
(B) For making organic dyes
(C) Making varnishes
(D) For making varnishes, organic dyes,
explosives nitrogen fertilizers etc.
17. Allotropes of phosphorus are of
(A) Three types (B) Four types
(C) Two types (D) Six different types
18. In combined state nitrogen is found in all living
matter including.
(A) Animals and plants as proteins urea and
amino acids.
(B) In plants only
(C) In animals only
(D) None of the above
19. All the elements of grown VIA are non-metals
except.
(A) S (sulphur) (B) O (oxygen )
(C) PO (pollinium ) (D) Te (tellurium)
20. In group VIA the radioactive metal is
(A) Te (tellurium) (B) O (oxygen)
(C) N (nitrogen) (D) None of the above
21. Oxygen has allotropic forms such as.
(A) Three (B) Four
(C) Two (D) Five
22. Oxygen is comprising about .
(A) 30% of earth's crust
(B) 20% of earth's crust
(C) 10% of earth's crust
(D) 50% of earth's crust
23. In the atmosphere the free oxygen occurs about
(A) 1/3 of the atmospheric air
(B) 1/2 of the atmospheric air
(C) 1/4 of the atmospheric air
(D) 2/3 of the atmospheric air
24. Water contains nearly combined form of oxygen
(A) 50% (B) 70%
(C) 30% (D) 89%
28. Which of the following does not contain
phosphorus?
a) Yolk of egg b) Bone
c) Nerves d) Steel
29. Which of the following elements can follow
extended octet rule?
a) P b) C
c) B d) N
30. The composition of brown ring in nitrate test is
________
a) FeSO4.NO b) FeSO4.NO2
c) FeSO4.NO3 d) None of above
31. Which one of the following compounds smells like garlic?
a) P2O3 b) P2O5
c) H3PO3 d) All have same smell
32. All the elements in group VIA are______________
a) Hygroscopic b) Metals
c) Polymeric d) All of above
33. Phosphoric acid is a weak acid and its basicity
is_______
a) 1 b) 3
c) Zero d) 1 & 3
34. The nitrogen gas present in air is
More b) Less reactive
Non reactive d) Moderatory reactive
35. The properties of Nitrogen is different from other members of its group to
Small atomic size and high E.N
Single screening shell
Absence of d – orbital in the valence shell
All of these
36. Nitrogen can not as a central metal atom in a complex because it can not
a) Devote electrons b) Accepts electrons
c) Form an ion d) All of these
37. Which oxides of nitrogen exist in solid state?
a) N2O b) NO
c) NO2 d) N2O5
38. The test which is used to confirm the presence of nitrate is
a) Silver minor test b) Ring test
c) Tollen’s test d) Baeyer’s test
39. Nitric oxide has
Unpaired electrons
Odd number of electrons
Paramagnetic
All of these
40. Mixture of HNO3 and NO2 is called
a) con HNO3 b) dil HNO3
c) fuming HNO3 d) HNO3
41. Which one PX5 is unknown?
a) PCl5 b) PBr5
c) PF5 d) Pl5
42. Orthophosphorous acid is a
a) Monobasic acid b) Dibasic acid
c) Tribasic acid d) Base
43. Galena is an ore of
a) S b) Te
c) Po d) Mg
44. White phosphorous occurs in the form of
Monoatomic molecule
Diatomic molecules
Triatomic molecules
Tetra atomic molecules
45. The acid which has garlic like smell and is crystalline deliquescent is
H2SO4 b) HCl
H3BO3 d) HNO3
46. The acid which forms three series of salt is
a) H2SO4 b) H3BO3
c) H3PO4 d) HNO3
47. Removal of arsenic oxide is very essential because it acts as a
a) Catalyst b) Activator
c) Catalytic poison d) Co-enzyme
48. The structure of H2SO4 is
a) Trigonal b) Octahedral
c) Tetrahedral d) Hexagonal
49. Which pair does not produce H2 gas?
Cu and Con HNO3
C2H5OH and Na metal
Mg and steam
Phenol and sodium metal
50. Why it is difficult to form nitrogen compounds from gaseous nitrogen
All its reactions are endothermic
The bond dissociation
It contain triple bond
Its first ionization energy is very high
51. The elements which is essential in nitrogen fixation is
a) Zn b) Mo
c) Fe d) S
52. Which one act as a free radical?
a) CO2 b) CH4
c) NO d) BF3
53. The starting material in Birkland and Eyde process for manufacturing of HNO3 is
a) NH3 b) NO2
c) Air d) NaNO3
54. In making safety matches we use
White phosphorus
Gray phosphorus
Violet phosphorus
Red phosphorus
55. Which is most stable isotope of sulphur?
a) Plastic sulphur b) Monoclinic sulphur
c) Rhombic sulphur d) Colloidal sulphur
56. Consider
NH4NO3 EMBED Equation.3 Product
The product formed is
a) N2O b) N2
c) NO d) N2O3
57. The product formed by heating mixture of NO and NO2 are
a) N2O5 b) N2O4
c) N2O d) N2O3
58. Nitric oxide is prepared by the action of HNO3
on
a) Fe b) Cu
c) Zn d) Sn
59. On industrial scale Nitric acid is prepared by
_______
a) Dutch Process
b) Birkland-Eyde’s Process
c) Solvay’s Process
d) Down’s Process
60. In Ostwald’s Process the substance used to
oxide ammonia is ______
a) Zn b) Pt
c) CO d) None of these
61. Copper reacts with dilute nitric acid to form
a) Nitric oxide b) Nitrogen peroxide
c) Nitrous Oxide d) None of these
62. By _______ process the H2SO4 produced is
pure and can be produced of any desired
strength.
a) Lead Chamber Process
b) Contact Process
c) Down’s Cell
d) None of these
63. Concentrated sulphuric acid acts as a ______
a) Reducing agent b) Oxidizing agent
c) Dehydrating agent d) None of these
64. In group VI A highest electronegativity is for
a) S b) O
c) Pb d) Se
65. Rhombic sulphur consists of _______
a) S8 chain b) S2 chains
c) S4 rings d) S8 rings
66. The number of hydroxyl group in
phrophosphoric acid is
a) 3 b) 4
c) 5 d) 7
67. When liquid sulphur at one atmospheric
pressre is very slowly cooled, unless super
cooling occurs, the first solid to appear is
_______
a) Monoclinic sulphur b) Rhombic sulphur
c) Hexagonal sulphur d) Metallic sulphur
68. _______ is obtained when ammonium
dichromate is refrigerant?
a) Nitrogen b) Oxygen
c) Ammonia d) None
69. Which compound acts as an oxidizing as well
as a reducing agent?
a) SO2 b) MnO2
c) Al2O3 d) CrO3
70. Which of the following acids does not involve
S – S bond?
a) Phyrosulphrous acid
b) Dichotomous acid
c) Dichotic acid
d) Pyrosulphuric acid
71. Oleum is formed by combining H2SO4 with
a) SO2 b) SO3
c) S d) H2S
72. When SO2 is passed through an acidified
KMnO4 solution
a) KMnO4 is oxidized
b) KMnO4 is reduced
c) SO2 is reduced
d) KMnO4 solution turns green
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