StudentAidUnit 13: Unit 13: Halogens — Mcqs
11th Class Chemistry · Unit 13: Halogens
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1.Which halogen molecule has the strongest bond?
2.The volatility of the halogens (Group 17) generally ________ as you move down the group (from Fluorine to Iodine).
3.Which one of the following halogen molecules has strongest oxidizing power?
4.The decreasing thermal stability of the halogens down the group is primarily due to the:
5.Which one of the following has strongest reducing power?
6.Which statement about the reaction between halogens and hydrogen is correct?
7.How does the acidic strength of hydrogen halides change as you move down the group?
8.Why is fluorine the most reactive halogen?
9.When aqueous silver nitrate is added to a solution containing bromide ions, a cream precipitate forms. What is the solubility of this precipitate in aqueous ammonia solution?
10.Concentrated sulfuric acid is added to solid sodium chloride. What is the initial observation?
Multiple Choice Questions
Introduction to Halogens (Group 17 Elements)
11.Which of the following halogens is radioactive?
12.The term "halogen" means:
13.What is the physical state of iodine at room temperature?
14.Why are halogens highly reactive?
15.Which halogen exists as a volatile liquid at room temperature?
16.Why are halogens diatomic in nature?
Physical Trends and Volatility
17.Which halogen has the highest boiling point?
18.What trend in volatility is observed in halogens from chlorine to iodine?
19.The decreasing volatility down the group is due to:
20.Which force governs the volatility trend in halogens?
21.Fluorine is a gas at room temperature due to:
22.What causes different colors in halogens?
Bond Strength and Stability
23.The weakest halogen-halogen bond is in:
24.The bond energy of Cl2 is:
25.Why is F-F bond weaker than Cl-Cl?
26.Bond strength in halogens generally:
Oxidizing Power and Reactivity
27.Which is the strongest oxidizing agent?
28.Oxidizing power of halogens decreases due to:
29.Which of the following halogens can displace all others from their salts?
30.The standard reduction potential of fluorine is:
31.The ability of halogens to oxidize depends on:
Reactions with Hydrogen
32.The product of halogen and hydrogen is:
33.Which halogen reacts explosively with hydrogen even in the dark?
34.Hydrogen halides in water form:
35.The reaction between H2 and I2 is:
Thermal Stability of Hydrogen Halides
36.The most thermally stable hydrogen halide is:
37.Which factor explains thermal stability of HX?
38.Which HX has the weakest H-X bond?
Halide Ions as Reducing Agents
39.Which halide ion is the strongest reducing agent?
40.The weakest reducing halide ion is:
Reactions with AgNO3 and H2SO4
41.AgNO3 with Cl- gives:
42.Which halide does not form ppt with Ag+?
43.AgBr is:
44.Reaction of NaCl and conc. H2SO4 gives:
Disproportionation Reactions
45.In cold NaOH, Cl2 gives:
46.In hot conc. NaOH, Cl2 gives:
47.Cl in Cl2 is both oxidized and reduced. This is:
Chlorine in Water Purification
48.Chlorine disinfects by forming:
49.The active species that kill bacteria are:
50.A disadvantage of chlorine use is:
Bleaching Powder and Chlorine Compounds
51.Bleaching powder is a mixture of:
52.Which gas is released when bleaching powder reacts with dilute acid?
53.What is the bleaching action of chlorine due to?
54.Chlorine is prepared in lab by:
Uses and Industrial Preparation
55.Halogens are used in:
56.Teflon is a polymer of:
57.Which compound is used in the treatment of goiter?
58.Fluorine is used in:
59.Iodine is used in:
60.Chlorofluorocarbons (CFCs) contribute to:
Comparison of Halogens
61.Which halogen is most electronegative?
62.Down the group, the oxidizing power of halogens:
63.Which halogen reacts least vigorously with hydrogen?
Environmental Aspects
64.The acidic strength of hydrogen halides increases in the order:
65.Which halogen compound contributes to ozone depletion?
66.Iodine is added to salt to prevent:
Analytical and Laboratory Tests
67.Test for halide ions using silver nitrate involves:
68.Which halide gives a white precipitate with AgNO3?
69.Which halide does not react with AgNO3?
70.Silver halides are photosensitive because: