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| Chemistry 12th Chapter 5 - The Halogens and The Noble Gases Questions Bank |
Chemistry 2nd Year Chapter 5 - The Halogens and The Noble Gases Solved MCQs, Important Short Questions and Long Questions Bank
MCQs
Please select the right answer.
1. _________ is used for earthquake prediction
2. All pathogenic microorganisms are killed by:
3. Among fluorides of xenon which is a mild flourinating agent:
4. An element that has a high ionization energy and tends to be chemically inactive would most likely
5. Astatine (radioactive element) has a half-life:
6. Bleaching powder is an example of:
7. Bleaching powder is not used for bleaching:
8. Bleaching powder may be produced by passing chlorine over
9. Bond angle in OF₂ is
10. Chlorine dioxide is a:
11. Chlorine heptaoxide (Cl₂O₇) reacts with water to form:
12. Cl₂O₇ react with H₂O to form:
13. Color of which halogen is not correctly related:
14. Consider the following reaction 6NaOH + 3Cl₂ → 5NaCl + NaClO₃ + 3H₂O the type of above reaction is:
15. Elements of which of the following groups will form anions most readily:
16. Fluorine does not have positive oxidation states due to the absence of
17. Goiter is caused due to the deficiency of:
18. H₂SO₄ and solid potassium dichromate gives:
19. Halogen acid in gaseous state found as equilibrium mixture of monomers and hexamers is:
20. Halogen used in toothpaste, it builds protecting covering:
21. HCl to give:
22. HF is stored in:
23. Hydrogen bond is the strongest between the molecules of
24. I₂O₅ is prepared by dehydration of:
25. In which compound, the oxidation state of xenon is not +6:
26. Iodine deficiency in diet is known to cause:
27. Iodine penta oxide, (I₂O₅) is used for the quantitative analyses of
28. Iodine pentoxide acts as a :
29. Mark the element, which can displace three halogens from their compounds:
30. Oxidation state of Ca in Ca(OCl)Cl (bleaching powder) is:
31. Oxidation state of chlorine in HClO₄ is:
32. Radon is formed by the removal of alpha particles from:
33. Refrigeration capacity of liquid neon is greater than liquid helium by:
34. Silver bromide is used in:
35. The anhydride of HClO₄ is:
36. The bleaching action of chlorine is due to:
37. The chemical formula of iodic acid is:
38. The Chemical formula of Perchloric acid is :
39. The compound which causes burn to skin that heels slowly: 11
40. The compounds of Xe are:
41. The following shows zero oxidation state:
42. The gas used in bactericidal lamps in:
43. The halogen that is most easily reduced:
44. The intensity of the colour depends on:
45. The last member of the family of inert gases is:
46. The lowest boiling point of helium is due to:
47. The most inert element in noble gas group is:
48. The noble gas which was discovered first on the Sun and then on the earth:
49. The oxidation states of Xe in its compounds range from:
50. The value of ionization potential for inert gases is:
51. The weakest oxyacid of Cl is?
52. This is attributed to many factors except:
53. What is the reason for lowest bond dissociation energy of F₂ among the halogens?
54. When Cl₂ is passed over by staked lime, the main product is:
55. Which amongst the following is the smallest atom?
56. Which halogen is most electropositive:
57. Which halogen occurs naturally in a positive oxidation state?
58. Which halogen will react spontaneously with Au(s) to produce Au?
59. Which hydrogen halide is the weakest acid in solution?
60. Which is the most polarised noble gas:
61. Which is the strongest acid:
62. Which is the strongest acid?
63. Which is used for making unshrinkable wool:
64. Which noble gas does not obey octet rule:
65. Which of following is most acidic?
66. Which of the following acid is used for etching of glass:
67. Which of the following compound is Carnallite:
68. Which of the following elements form acidic oxide only?
69. Which of the following elements show only one oxidation state in its compounds:
70. Which of the following fluorides of xenon is impossible?
71. Which of the following gases is used in radio therapy for cancer treatment and earthquake predictions?
72. Which of the following halogen is in solid form at room temperature:
73. Which of the following halogens does not form oxyacids:
74. Which of the following has greater volatility:
75. Which of the following has greatest reducing power:
76. Which of the following hydrogen halide is the weaker acid in solution?
77. Which of the following hydrogen halides is liquid at room temperature
78. Which of the following is monoatomic gas:
79. Which of the following is most volatile:
80. Which of the following is the strongest acid:
81. Which of the following is used in radiotherapy:
82. Which of the following is used to fill fluorescent tubes:
83. Which of the following noble gas is not present in atmosphere:
84. Which of the following noble gases does not have an octet of electrons in its outermost shell:
85. Which of the following react with H₂ in dark:
86. Which of the following represents the correct electronic configuration of the outem-yost energy level of an element of zero (VIIIA) group in the ground state?
87. Which of the following statement is correct?
88. Which of the halogens is most easily reduced:
89. Which one is chlorous acid?
90. Which one is percholric acid?
91. Which one is used for etching of glass:
92. Which one of the following compounds is not known?
93. Which one of the following will displace Br₂ from an aqueous solution containing Br⁻ ion?
94. Which silver salt is fairly soluble in H₂O?
95. Which silver salt is sparingly soluble in H₂O:
96. Which substance is used for etching of glass?
97. Who reported the first noble gas:
98. XeF₂ molecule is:
99. XeF₆ on partial hydrolysis produces:
Short Questions
1. Arrange the following ions in the order of increasing sizes?
2. Arrange the following oxyacids in the increasing order of acid strength. HClO₄, HClO₃, HClO₂, HOCl
3. Compare the halogen acids in their reducing properties?
4. Compare the physical states and colors of halogens at room temperature?
5. Describe two uses of helium.
6. Due to which reasons fluorine shows peculiar behavior from other family member?
7. Give important uses of chlorine?
8. Give peculiar behaviour of fluorine?
9. Give the formulas and names of important oxides of chlorine and bromine?
10. Give the important applications of helium and argon?
11. Give the important uses of bromine and iodine?
12. Give the important uses of radon?
13. Give the names and formulas of oxyacids of chlorine and iodine?
14. Halogens are strong oxidizing agents. Justify it?
15. HCIO₄ may cause explosion. Give reason. Give its preparation?
16. How are halogen acids in water?
17. How bleaching powder can act as an oxidizing agent?
18. How do you compare preparations of halogen acids?
19. How do you compare the stabilities of oxyacids of halogens?
20. How do you justify that CI₂O₇ is the anhydride of perchloric acid?
21. How do you justify the decreasing bond dissociation energy of halogen acids?
22. How do you justify the increasing acid strengths of oxyacids of chlorine with increasing no.of O-atoms?
23. How does astatine differ its own family members?
24. How does bleaching powder act as a bleaching agent for fabrics?
25. How does bleaching powder act as an oxidizing agent towards halogen acids?
26. How does radon differ from its own family members?
27. How does the hydrogen boding in HF change the properties of this compound from other halogen acids?
28. How halogen acids are iodized in water?
29. How NaOH reacts with Cl₂ in cold and hot state?
30. How the solubilities of noble gases are affected in water?
31. How the thermodynamic properties of halogen acids change in a group from upper to the downward direction?
32. Justify that reaction of chlorine with NaOH in the cold state is disproprotiontion reaction?
33. Justify that the reaction of chlorine with NaOH in the hot state is disproprotionation reaction?
34. On what basis perchloric acid is considered a valuable analytical reagent?
35. The elements of group VIIIA are called Nobel gases. Comment.
36. What are Freons and Teflon?
37. What are freons. Give there uses?
38. What are noble gases.Why are they inert?
39. What are the important ores and minerals of fluorine and iodine?
40. What are those factors which affect the oxidizing power of halogens?
41. What do you mean by available chlorine and how is it calculated?
42. What factors affect the oxidizing power of halogens?
43. What is iodex and tincture of iodine?
44. What is iodized salt? Write its function.
45. What is meant by Available chlorine? How quality of bleaching powder is tested?
46. What is structural formula of Teflon? Mention its two uses.
47. What is teflon. Give its uses?
48. What is the effect of high voltage on noble gases?
49. Which halogen is used as an antiseptic?
50. Which halogen is used in water treatment to kill bacteria?
51. Why bleaching powder shows bleaching action?
52. Why fluorine and chlorine act as decolourizing agents?
53. Why HCIO₄ is a stronger acid than HBrO₄ than HIO₄?
54. Why HF is a weaker acid than HCI and HI is strongest in the series?
55. Why HF is a weaker acid than other halogen acids?
56. Why iodine has metallic Iustre?
57. Why solubility of noble gases increases down the group?
58. Why the dissociation energies of halogens go on decreasing down the group?
59. Why the elements of group VII-A are called halogens?
60. Why the elements of group VIII-A are called noble gases?
61. Why the elements of VIA other than oxygen show more than two oxidation states?
62. Why the oxidation states of noble gases are usually zero?
63. Write any two uses of krypton?
64. Write disproportionation reaction of chlorine.
65. Write down reactions of chlorine with cold and hot NaOH.
66. Write four uses of halogens.
67. Write the reaction of NaOH with Cl₂ in cold state.
68. Write two uses of each helium and argon.
Long Questions
1. Explain peculiar behaviour of fluorine.
2. Discuss Relative Reactivities of the Halogens as Oxidizing
3. Give rules for nomenclature of oxyacids of halogens.
4. What is Bleaching Powder? How is it prepared commercially?
5. How bleaching powder is prepared? Give uses.
6. How does bleaching powder reacts with (i) NH₃ (ii) HCI (iii) H₂O (iv) dil H₂SO₄?
7. Write down reactions of CaOCl₂ with (i) CO₂ (ii) HCI (iii) NH₃ (iv) H₂SO₄
8. What happened when bleaching powder reacts with: (a) dil. H₂SO₄ (b) conc. H₂SO₄ (c) NH₃ (d) HI
9. Write the Commercial uses of Flourine, Chlorine and their compounds.
10. Write chemical reactions of Fluorides of Xenon.
11. Give eight uses of noble gases.
12. Give two applications of each.
(i) Helium (ii) Argon
13. Write uses of neon and argon.