CHAPTER 5
THE HALOGENS AND THE NOBLE GASES 1. Halogen acid in gaseous state found as equilibrium mixture of monomers and hexamers is: (a) HF (b) HCl (c) HBr (d) HI
2. Color of which halogen is not correctly related: (a) F2 Colorless gas . (b) Cl2 greenish yellow gas (c) Br2 Reddish brown liquid (d) I2 grayish black solid
3. Mark the element, which can displace three halogens from their compounds: (a) F2 (b) Cl2 (c) Br2 (d) I2
4. The chemical formula of iodic acid is: (a) HI (b) HIO (c) HIO2 m(d) HIO3
5. The most inert element in noble gas group is: (a) He (b) Ne (c) Ar (d) Kr
6. In which compound, the oxidation state of xenon is not +6 (a) XeOF2 (b) XeOF4 (c) XeO3 (d) XeF6
7. Radon is formed by the removal of alpha particles from: (a) Radium (b) Rhenium (c) Rhodium (d) Rutherfordium
8. Which of the following gases is used in radio therapy for cancer treatment and earthquake predictions? (a) Ar (b) Ne (c) Xe (d) Rn
9. Chlorine heptaoxide (Cl2O7) reacts with water to form: (a) hypochlorous acid (b) perchloric acid (c) chloric acid (d) chlorine and oxygen
10. The anhydride of HClO4 is: (a) Cl2O7 (b) Cl2o4 (c) ClO3 (d) ClO2
11. Silver bromide is used in: (a) Paints (b) Photography. (c) Ceramics (d)Gasoline
12. Which of the following acid is used for etching of glass: (a) HF (b) HCl (c) HBr (d) HI
13. Oxidation state of chlorine in HClO4 is: (a) -7 (b) +7 (c) -1 (d) +1
14. Which is used for making unshrinkable wool: (a) HBr (b) I2 (c) Bleaching powder (d) HCI
15. _________ is used for earthquake prediction (a) Rn (b) Kr (c) Xe (d) Ar
16. Which of the following compound is Carnallite: (a) KCl. Mg (OH)2. 6H2O. (b) KOH. MgCl2 6H2O (c) KOH. Mg(OH)2 . 6H2O (d) KCl. MgCl2 .6H2O
17. Chlorine dioxide is a: (a) Red gas (b) Pale yellow gas (c) Orange gas (d) Green gas
18. Iodine pentoxide acts as a : (a) Reducing Agent (b) Oxidizing Agent (c) Dehydrating Agent (d) None of these
19. The Chemical formula of Perchloric acid is : (a) HClO (b) HClO3 (c) HClO4 (d) HClO2
20. The oxidation states of Xe in its compounds range from: (a) +2 to +8 (b) +3 to +5 (c) +11 to +8 (d) +3 to +7
21. The compounds of Xe are: (a) Saturated (b) Unsaturated (c) Stable (d) Unstable
22. Which of the following is used to fill fluorescent tubes: (a) Krypton (b) Argon (c) Xenon (d) Neon
23. Which is the strongest acid: (a) HI (b) HCl (c) HBr (d) HF
24. Which of the following halogens does not form oxyacids: (a) Fluorine (b) Chlorine . (c) Bromine (d) Iodine
25. Which amongst the following is the smallest atom? (a) F (b) Cl (c) Br (d) I
26. Fluorine does not have positive oxidation states due to the absence of (a) d-orbital (b) s-orbital . (c) p-orbital (d) None
27. Which of the following has greatest reducing power: (a) HI (b) HBr (c) HCl m(d) HI
28. Which of the following elements show only one oxidation state in its compounds: (a) F (b) Cl (c) Br (d) I
29. Which halogen is most electropositive: (a) F (b) Cl (c) Br (d) I
30. Fluorine is a stronger oxidizing agent than chlorine in aqueous solution. This is attributed to many factors except: (a) Heat of dissociation. (b) Electron affinity (c) Ionization potential (d) Heat of hydration
31. Bleaching powder reacts with a few drops of conc. HCl to give: (a) Chlorine (b) Hypochlorous acid (c) Calcium oxide (d) Oxygen
32. The bleaching action of chlorine is due to: (a) Reduction (b) Hydrogenation (c) Chlorination (d) Oxidation
33. Elements of which of the following groups will form anions most readily: (a) Oxygen family (b) Nitrogen family (c) Halogens (d) Alkali metals
34. The halogen that is most easily reduced: (a) F2 (b) Cl2 (c) Br2 (d) I2
35. Which of the following is most volatile: (a) HI (b) HBr (c) HCl (d) HF
36. Sodium chloride when heated with conc. H2SO4 and solid potassium dichromate gives: (a) Chromic chloride (b) Chromyl chloride (c) Chromous chloride (d) None of these
37. Which of the following is monoatomic gas: (a) Oxygen (b) Neon (c) Fluorine (d) Nitrogen
38. Which of the following fluorides of xenon is impossible? (a) XeF2 (b) XeF3 (c) XeF4 (d) XeF6
39. The following shows zero oxidation state: (a) Kr (b) Be (c) Al (d) Na
40. Which of the following noble gas is not present in atmosphere: (a) He (b) Ne (c) Ar (d) Rn
41. The noble gas which was discovered first on the Sun and then on the earth: (a) Argon (b) Xenon (c) Neon (d) Helium
42. The last member of the family of inert gases is: (a) Argon (b) Radon (c) Xenon (d) Neon
43. XeF6 on partial hydrolysis produces: (a) XeF2 (b) XeOF2 (c) XeOF4 (d) XeO3
44. Which of the following noble gases does not have an octet of electrons in its outermost shell: (a) Neon (b) Radon (c) Argon (d) Helium
45. The value of ionization potential for inert gases is: (a) Zero (b) Low (c) High (d) Negative
46. The lowest boiling point of helium is due to: (a) Inertness (b) Gaseous nature (c) High polarizability (d) Weak Van-der Waal’s forces between atoms
47. Which of the following statement is correct?
(a) Bond energy of F2 is less than Cl2 (b) Bond energy of F2 is less than I2 (c) Bond energy of Cl2 is less than F2 (d) Bond energy of Cl2 is less than Br2
48. Goiter is caused due to the deficiency of: (a) Flourine (b) Bromine (c) Chlorine (d) Iodine
49. Which hydrogen halide is the weakest acid in solution? (a) HF (b) HBr (c) HI (d) HCl
50. The compound which causes burn to skin that heels slowly: (a) F2 (b) Cl2 (c) Br2 (d) Acid
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Chemistry