 |
| Chemistry 12th Chapter 4 - Group VA and Group VIA Elements Questions Bank |
Chemistry 2nd Year Chapter 4 - Group VA and Group VIA Elements Solved MCQs, Important Short Questions and Long Questions Bank
MCQs
Please select the right answer.
1. In group V-A element the most electronegative element is:
2. “Lead” in lead pencil is:
3. A strong triple bond is present between two nitrogen atoms in a molecule and therefore nitrogen gas is:
4. Among group VA elements, the most electronegative element is
5. Aqua Regia is:
6. Arsenic oxides are removed during manufacture of H₂SO₄ by passing through:
7. At 18 ͦC the specific gravity of H₂SO₄ is:
8. Atomic number of Te is:
9. Bone ash contains:
10. Chemical formula of laughing gas is
11. Cinnabar is:
12. FeSO₄ forms brown ring with:
13. Formula of Gibbsite is:
14. Free nitrogen and oxygen are present in atmosphere but they do not react with each other under normal conditions because
15. Gold dissolve in Aqua regia to give:
16. H₂SO₄ has great affinity for water because:
17. H₂SO₄ produces:
18. H₂SO₄ the sugar becomes black due to:
19. HNO₂ acts as an/a:
20. HNO₂ is:
21. HNO₃ is:
22. In group VA the most electronegative element is:
23. In Pyrite burner, the gas produced is:
24. In which compound of nitrogen, the oxidation state of N is (+1):
25. In which substance nitrogen is not present:
26. Indicate the formula of metaphosphoric acid is:
27. Laughing gas is chemically
28. Molecular formula of white phosphorous is:
29. Most of the sulphuric acid is manufactured in world is by:
30. Nitric acid, Sulphuric acid and Caustic soda can be transported in a container made up of:
31. Nitrous acid is a:
32. NO₂ is called
33. Oleum is:
34. Ortho-phosphoric acid has melting point:
35. Orthophosphoric acid is:
36. Out of all the elements of group VA, the highest ionization energy is possessed by
37. Out of all the elements of group VIA, the highest melting and boiling points is shown by the elements
38. Oxidation of NO in air produces:
39. Oxidation of NO in air produces:
40. Ozone is not:
41. P₂O₅ is heated with water to get:
42. Phosphorous shows oxidation state (+3) in which of the following:
43. Phosphorus helps the growth of:
44. Phosphorus pentoxide is used as:
45. Red phosphorous can be obtained from white Phosphorous by:
46. SO₃ is not absorbed in water directly to from H₂SO₄ because
47. SO₃ is not directly dissolved in water to get Sulphuric acid because:
48. The percent by volume of N₂ in air is:
49. The anhydride of nitric acid is:
50. The brown gas formed when metal reduces HNO₃ is:
51. The catalyst used in manufacturing of H₂SO₄ by Contact process is:
52. The composition of Aqua Regla is:
53. The composition of oleum is:
54. The compound N₂O causes disease:
55. The contact process for the manufacturing of H₂SO₄ was developed by:
56. The element whose inorganic minerals are not much abundant in earth crust:
57. The given element gives NO gas with dil HNO₃:
58. The lowest ionization energy is possessed by:
59. The most electronegative element in group-VA is
60. The percentage of N in NH₃:
61. The structure of white phosphorus is:
62. The substance which is attracted by the magnetic field is called:
63. What is the number of electrons present in the valence shell of P in PCl₃ ?
64. When red phosphorous is heated with HNO₃ it forms:
65. Which catalyst is used in contact process?
66. Which catalyst is used in lead chamber process?
67. Which element is the most abundant in the earth’s crust:
68. Which is a laughing gas:
69. Which metal is rendered passive by HNO₃?
70. Which of the following elements does not show the phenomena of allotropy?
71. Which of the following elements is most metallic:
72. Which of the following gas is evolved when copper reacts with dil HNO₃?
73. Which of the following gives brown ring with FeSO₄?
74. Which of the following is a reddish brown gas:
75. Which of the following is a white hygroscopic powder:
76. Which of the following is not correct about Phosphorous?
77. Which of the following is used at the tips of match stick:
78. Which of the following metal reacts with HNO₃:
79. Which of the following phosphorus is most reactive:
80. Which of the following shows phosphorescence?
81. Which of the following species has the maximum number of unpaired electrons?
82. Which of the following statement is incorrect?
83. Which one of the following compounds is not known:
84. Which one of the following elements occur free in nature:
85. Which one of the following is an amphoteric oxide:
86. Which one of the following molecules is paramagnetic in nature?
87. Which one the following elements occur free in nature:
88. Yellow colour of Nitiric Acid is due to the presence of:
Short Questions
1. Complete and balance the following chemical equation.
KMnO₄+ FeSO₄+ H₂SO₄ ----->
2. Describe “Ring test for the confirmation of the presence of nitrate ions in solution?
3. Give four dissimilarities of oxygen and sulphur.
4. Give reactions to justify that H₃PO₃ is a reducing agent?
5. Give the advantages of contact process for the manufacture of sulpuric acid?
6. Give the name and formulas of oxyacids of phosphorus and indicate the oxidation number of phosphorus in them?
7. Give the names and formulas of various oxides of phosphorus?
8. Give the names of four elements which do not react with nitric acid.
9. Give two reactions of sulphuric acid which show its oxidizing behaviour.
10. Give two reactions which show oxidizing behaviour of NO.
11. Gives the reactions of HNO₃ in which it acts as an oxidizing agent?
12. H₃PO₃ is dibasic acid although it has three hydrogen atoms in that. Give reasons?
13. How a brown couloured gas NO₂ is prepared from:
14. How allotropy is associted with nitrogen and phosphorus?
15. How dilute HNO₃ can be concentrated on commercial scale?
16. How do you compare the elements of the group VI-A in their physical states?
17. How do you compare the properties of white and red phosphorus?
18. How do you compare the structures of N₂O and NO?
19. How do you compare the structures of PCI₃ and NH₃?
20. How do you justify that N₂O is a supporter of combustion?
21. How does aqua regia dissolve gold?
22. How does H₂SO₄ act as a dehydrating reagent?
23. How does HNO₂ act as reducing agent?
24. How does HNO₂ acts as an oxidizing agent?
25. How does nitrogen differ from its family members in physical state atomicity and variety of oxidation states?
26. How does oxygen differ from its own family members especially sulphur?
27. How does oxygen occur in nature?
28. How does P₂O₃ react with water in cold and hot state?
29. How does P₂O₅ react with water in cold and hot state?
30. How does phosphorus occur in the form of minerals in plants and animal tissues?
31. How does sulphur occur in nature?
32. How H₃PO₄ is affected at high temperature?Is it a tribasic acid?
33. How KmnO₄ and K₂Cr₂O₇ react with H₂SO₄ ?
34. How NO₂ is prepared from:
a. Lead nitrate
b. Cu+HNO₃
35. How PCI₃ and PCI₅ react with alcohols and carboxylic acids?
36. How sulphur can increase its oxidation number but oxygen can not?
37. How the involvement of d-orbital increases the oxidation number of phosphorus?
38. How the melting and boiling points for the elements of group V-A vary down the group?
39. i) pbNO₃ ii) Cu and HNO₃
40. Justify that conc. H₂SO₄ is a dehydrating agent.
41. Justify that NO acts as an oxidizing agent?
42. Justify that P₂O₅ is the dehyderating reagent?
43. Justify that sulphuric acid is king of chemicals.
44. Mention the catalytic condition for the emanufacture of H₂SO₄ in contact process?
45. Mention various allotropic forms for the elements of group VI-A?
46. Name three allotropic forms of phosphorus.
47. NO₂ is a strong oxidizing agent. Prove with the help of two examples.
48. P₂O₅ is powerful dehydrating agent. Give two examples.
49. What are the optimum condition for the manufacture of H₂SO₄ in the contact tower?
50. What happens when NO₂ is dissolved in water?
51. What is aqua regia and how does it dissolve the noble metals?
52. What is aqua regia?
53. What is meant by fuming nitric acid?
54. What is the action of heat on orthophosphoric acid? Write chemical equation also.
55. What is the effect of temperature on N₂O₄?
56. What is the general occurrence of elements of group V-A?
57. What is the rection of No with FeSO₄ solution?
58. What type of oxides are mostly given by the elements of group V-A?
59. Why SO₃ is dissolved in sulphuric acid and not in water?
60. Why SO₃ gas is dissovled in H₂SO₄ but not in water in contact process?
61. Why the elements of VIA other than oxygen show more than two oxidation states?
62. Why the outermost p-sub-shells of group V-A elements are extra stable?
63. Write any four properties of sulphuric acid.
64. Write any four uses of Nitric acid.
65. Write down the equation for the reaction between conc. H₂SO₄ and copper and explain what type fo rection is it?
66. Write down the formulas and names of oxyacids of nitrogen posphorus,arsenic and antimony with oxidation number +5?
67. Write down the name formulae and colours of oxides of nitrogen along with the oxidation states of nitrogen in them?
68. Write down the reaction involved in the preparation on HNO₃ by Birckland Eyde’s process?
69. Write down two chemical reactions which show that sulphuric acid is a dehydrating agent?
70. Write two points of dissimilarities of oxygen and sulphur.
71. Write two reactions of preparation of nitrous acid.
Long Questions
1. What happen when dil HNO₃ and conc. HNO₃ react with following?
(i) Cu (ii) Hg (iii) Sn (iv) Zn
2. How is nitric acid prepared industrially? Give all equations involved.
3. Describe eight points of similarities of oxygen with sulphur.
4. How sulphuric acid is manufactured by contact process on industrial scale?
5. Write preparation and two reactions of HNO₂.
6. Write down four similarities and four differences between oxygen and sulphur.
7. H₂SO₄ is a dehydrating agent and oxidizing agent, prove this truth by giving two examples of each.
8. Write down two reactions in which HNO₂ acts as an oxidizing agent and two reactions in which HNO₂ acts as reducing agent.
9. Discuss reactions of Sulphuric Acid as a Dehydrating Agent.
10. Explain the cathode coating and anode coating of iron.