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17 Group Elements

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Published in: Chemistry
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Introduction to 17 group Elements

Sachin S / Pune

14 years of teaching experience

Qualification: M.Sc (Pune University - 2008), B.Sc (Yashwant College - 2006)

Teaches: Chemistry, AIEEE, BITSAT, CET, IIT JEE Advanced, IIT JEE Mains, AIPMT, Medical Entrance Exams, NEET

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  1. 17 GROUP ELEMENTS
  2. 17 GROUP ELEMENTS Level - 1 17 GROUP ELEMENTS OBJECTIVE LEVEL- I
  3. 17 GROUP ELEMENTS Level - 1 1. The electronic configuration of four elements A, B, C and D are 1s2 2s22p2 c=1s2 2ps D=1s2 2p6 The tendency to form electrovalent bond easily Solution : More E.N elements form ionic bond quickly.
  4. 17 GROUP ELEMENTS Level - 1 2. The halogen with the highest value of ionization energy is Solution : Due to small atomic radius F have high ionization energy.
  5. 17 GROUP ELEMENTS Level - 1 3. Which of the following has highest electronegativity ? 1) Iodine Solution : 2) Bromine 3) Chlorine luorine Flourine is more E.N.
  6. 17 GROUP ELEMENTS 4. The order of electron affinity of halogens is Solution : E.A order of halogens is Level - 1
  7. 17 GROUP ELEMENTS Level - 1 5. Which of the following shows greatest inert pair effect ? 1) Fluorine Solution : 2) Chlorine 3) Bromine odine Down the group inert pair effect increases.
  8. 17 GROUP ELEMENTS 6. A substance that sublimes readily is Level - 1 3) Bromine 1) Fluorine Solution : Iodine sublimises. 2) Chlorine Iodine
  9. 17 GROUP ELEMENTS 7. Halogens are coloured because 1) Their atoms have high electronegativity Level - 1 2) Their molecules are held together by weak vanderwaals forces eir molecules absorb visible light causing the excitation of outer electrons to higher energy levels 4) Their atoms absorb energy causing the excitation of outer electrons to higher energy levels Solution : Halogens absorb vissible light causing excitation of outer electrons to higher energy levels.
  10. 17 GROUP ELEMENTS Level - 1 8. Which of the following halogen has highest bond dissociation energy 1) Fluorine Solution : Chlorine 3) Bromine 4) Iodine Chlorine have high bond dissociation energy.
  11. 17 GROUP ELEMENTS Level - 1 9. Fluorine does not show variable oxidation states due to 1) Its high electronegativity 2) Smallest size of its atoms 3) Low bond dissociation energy Non availability of d-orbitals Solution : Due to absence of d-orbitals flourine do not show variable oxidation states.
  12. 17 GROUP ELEMENTS Level - 1 10. Which element would readily replace oxygen from an oxide ) Fluorine Solution : 2) Chlorine 3) Nitrogen 4) Sulphur Due to more electro negative. Fluorine replace oxygen from oxides.
  13. 17 GROUP ELEMENTS Level - 1 11. Which of the following compounds has the lowest boiling point ? 3) HBr Solution : Due to low molecular weight and absence of hydrogen bond. HCI have low boiling point.
  14. 17 GROUP ELEMENTS Level - 1 12. Which of the following has the highest percentage of ionic character? 1) HCI olution : 3) HBr 4) HI Due to more difference in Electro negativity HF has more ionic character.
  15. 17 GROUP ELEMENTS Level - 1 13. Which of the following hydrogen halides, the thermally most stable is 2) HCI 3) HBr 4) HI olution : Down the group thermal stability decreases.
  16. 17 GROUP ELEMENTS Level - 1 14. Which of the following does not form precipitate with AgN03 ? 2) HCI 3) HBr 4) HI olution : HF do not give ppt with AgN03.
  17. 17 GROUP ELEMENTS Level - 1 15. Fluorine is more reactive than chlorine because -F bond is weaker than CI-CI bond 2) Fluorine does not have d-orbitals 3) Fluorine has high ionization energy 4) Electron affinity of fluorine is lesser than that of chlorine Solution : F-F bond is weaker than CI-CI bond.
  18. 17 GROUP ELEMENTS Level - 1 16. Which of the following has the maximum vapour pressure HCI Solution : 2) 1--1Br 3) HI 4) H2F2 Due to low boiling point. HCI have high vapour pressure.
  19. 17 GROUP ELEMENTS Level - 1 17. Which of the following will result in the oxidation of halide ion ? 1) C12 passed through aqueous NaCl 2) 12 added to aqueous HI 3) Br2 added to aqueous NaF olution : F2 added to aqueous I-ICI Lighter halogen displaces heavier halogens from their aqueous halides. When F2 added to aquous HCI, Cl- ion replaces.
  20. 17 GROUP ELEMENTS Level - 1 18. Which of the following form inter-halogen compounds ? All the above Solution : All halogens forms inter halogen compounds.
  21. 17 GROUP ELEMENTS Level - 1 19. Which of the following is known as a super halogen ? 1) Chlorine Solution : 2) Bromine Fluorine 4) Iodine Flourine is known as super halogen.
  22. 17 GROUP ELEMENTS Level - 1 20. The halogen forming largest number of inter-halogens is Solution : Among halogens F2 forms more no.of Inter halogen compounds.
  23. 17 GROUP ELEMENTS 21. Halogen which shows metallic character is Solution : Down the group metallic character increases. Level - 1
  24. 17 GROUP ELEMENTS 22. Halothane is 1) CF2C12 CF3CHCIBr Level - 1 3) C2F4 4) All Solution : CF3 - CH- Cl is known as halothane.
  25. 17 GROUP ELEMENTS 23. Order of volatile nature of halogens is Gradually decreases from F2 to 12 Level - 1 2) Decreases from F2 to Br2 and then increases 3) Gradually increases from F2 to 12 4) Increases from F2 to Br2 and then decreases lution : Down the group volatile nature of halogen decreases.
  26. 17 GROUP ELEMENTS 24. The order of bond energy of halogens is Level - 1 1) < < < 12 C12 > Br2 > > 12 Solution : 2) F2 > > Br2 > 12 4) C12 > F2 > > 12 The bond energy order of halogens. C12 > > >
  27. 17 GROUP ELEMENTS Level - 1 25. The number of unpaired electrons and lone pair of electrons in the first excited state of chlorine in its valency shell 1) 2 and 2 Solution : 2)3and3 3) 2 and 3 3and2 In first excited state of fluorine no.of unpaired electrons and lone pair of electrons are 3 and 4 respectively.
  28. 17 GROUP ELEMENTS Level - 1 26. Hybridisation of central halogen atom in XX; type molecule is 1) sp3 Solution : 2) sp3d 3) sp3d2 p3d3 XX;. The central atom involves sp3d3 hybridisation.
  29. 17 GROUP ELEMENTS Level - 1 27. The order of reactivity of halogens with hydrogen is 1)F2 < < < 12 3) F2 > Br2 > C12 > 12 olution : > C12 > Br2 > 12 4) F2 > 12 > Br2 > C12 The reactivity order of halogens is F 2 > C12 > Br2 > 12
  30. 17 GROUP ELEMENTS Level - 1 28. At ordinary temperature and pressure, chlorine is a gas, bromine is a liquid and iodine is a solid. This is because 1) Of these three, chlorine is the lightest and iodine is the heaviest 2) Chlorine has a lowest specific heat 3) Chlorine molecule is the least stable Intermolecular forces are weakest in chlorine and strongest in Iodine. Solution : Down the group intermolecular forces of attraction increases. So, Clrgas. Brrliquid. 12-solid at ordinary temparature.
  31. 17 GROUP ELEMENTS 29. Halogen molecules are 1) Diatomic and form Xi ions Level - 1 Diatomic and form X - ions 3) Monoatomic and form X2- ions 4) Monoatomic and form X - ions Solution : Halogen molecules are di atomic and forms X -ions.
  32. 17 GROUP ELEMENTS Level - 1 30. Iodine is liberated when chlorine is passed through an acidified solution of potassium iodide because 1) Chlorine is powerful reducing agent than iodide Chlorine is powerful oxidising agent than iodide 3) Chlorine is more electronegative than iodine 4) Chlorine is less electronegative than iodine Solution : Chlorine is powerful oxidising agent then Iodine.
  33. 17 GROUP ELEMENTS Level - 1 31. One gas bleaches the colours of flowers by reduction and the other by oxidation. The two gases are respectively 1) and S02 2) and Br2 S02 and C12 4) and S03 Solution : S02 on reduction bleaches coloured matter due to reduction chlorine. Bleacher coloured matter due to oxidation.
  34. 17 GROUP ELEMENTS 32. Which of the following is most stable to heat ? Level - 1 4) HI HCI Solution : 2) HOCI 3) 1--1Br HCI have more bond energy.
  35. 17 GROUP ELEMENTS Level - 1 33. On boiling an aqueous solution of KC103 with iodine the following product is obtained ? K103 olution : 2) KC104 3) K104 4) KCI 2KC103 + 12 2K103 + C12
  36. 17 GROUP ELEMENTS Level - 1 34. At room temperature F2 reacts with all non metals except 2) S and Br 1) B and C Solution : 3) H2and Te 02 and N2 At room temperature F2 react with all non.metal except 02 and N?
  37. 17 GROUP ELEMENTS 35. Bad conductor of electricity is Level - 1 3) 1--1Br 4)H2F2 Solution • 2) HCI 4) HI Due to absence of free ions H2F2 bad conductor of electricity.
  38. 17 GROUP ELEMENTS Level - 1 36. Which member of the halogen family (X2) does not show positive oxidation state (X+)? luorine olution : 2) Chlorine 3) Bromine 4) Iodine Due to more E.N in halogen family F2 do not show +ve oxidation state.
  39. 17 GROUP ELEMENTS Level - 1 37. The elements which exists in the liquid state is/ are 1) Bromine Solution : 2) Mercury 3) Gallium All BryHg & Ga exist in liquid state.
  40. 17 GROUP ELEMENTS Level - 1 38. As the atomic number of halogens increases, the halogens 1) Lose the outermost electrons less readily 2) Become lighter in colour 3) Become less denser Gain electrons less readily Solution : As atomic no.lncreases tendency to gain electron decreases in halogens.
  41. 17 GROUP ELEMENTS Level - 1 39. A solution of potassium bromide is treated with each of the following. Which one would liberate bromine ? 1) Hydrogen iodide Chlorine Solution : 2KBr + 2KC1 + Br2 2) Sulphur dioxide 4) Iodine
  42. 17 GROUP ELEMENTS Level - 1 40. Which of the following pairs is not correctly matched ? 1) A halogen which is liquid at room temperature - Bromine 2) The most electronegative element - Fluorine 3) he most reactive halogen - Fluorine The strongest oxidising halogen - fluorine olution : The strongest oxidising halogen is F?
  43. 17 GROUP ELEMENTS 41. The hybridization in IF7 is Level - 1 3) sp3 d 4) sp3 d3 olution : 2) d2sp3 4) sp3 In IF7 hybridisation is sp3 d3.
  44. 17 GROUP ELEMENTS Level - 1 42. Mark the halogen that does not give disproportionation reaction with alkalies Fluorine Solution : 2) Chlorine 3) Bromine 4) Iodine The element which exhibit more than two oxidation states can under go disproportionation reactions. But fluorine have only two oxidation states((),-l)
  45. 17 GROUP ELEMENTS Level - 1 43. Which of the following is red coloured liquid at room temperature? 1) HCI Solution : 2) 1--1Br 3) C12 At room temperature Br2 is reddish brown coloured liquid.
  46. 17 GROUP ELEMENTS 44. Halogen atoms have Level - 1 1) High ionisation energy, high electron affinity, and low lectronegativity. High ionization energy, high electronegativity and high electron afTinity. 3) High ionization energy, low electron affinity and high electronegativity 4) Low ionization energy, high electron affinity and low electronegativity Solution : Halogens have more E.N, I.E & E.A
  47. 17 GROUP ELEMENTS Level - 1 45. Fluorine differs from rest of the halogens due to 1) Its high electronegativity 2) Smallest size and lack of d-orbitals 3) Low bond dissociation energy All the above
  48. 17 GROUP ELEMENTS Level - 1 46. In dilute aqueous solution HF is a weaker acid than HI, because H - F bond energy is greater than HI bond energy 2) The hydration energy of F- is higher than that of I- 3) Of the presence of hydrogen bonds in HI 4) Fluorine is a stronger base as compared to iodine. lution : HF bond energy is greater than HI bond energy.
  49. 17 GROUP ELEMENTS 47. Boiling points of the hydrogen halides Level - 1 1) creases regularly in order of relative molecular mass Decreases sharply from HF to HCI and then increases 3) Decreases regularly in order of relative molecular mass 4) Increases sharply from HF to HCI and then decreases regularly with increase of relative molecular mass. olution : In HF hydrogen bonds are present. So it has high B.P than HCI. From HCI onwards with increase in the molecular weight of hydrogen halide B.P is also increases.
  50. 17 GROUP ELEMENTS Level - 1 48. The order corresponds to which of the following properties ond length 3) Ionic character Solution : The order of bond length is HI > HBr > HCI > HF. 2) Thermal stability 4) Dipole moment
  51. 17 GROUP ELEMENTS Level - 1 49. Amongst the following, the one which is capable of existence is 1) KHC12 Solution : KHF2 3) KHBr2 4) KH12 KHF2 is exist. Because of formation of hydrogen bond.
  52. 17 GROUP ELEMENTS Level - 1 50. Which of the following halogen has more bond energy? 1) Fluorine Solution : Bond energy order : Chlorine C12 > > 12 3) Bromine 4) Iodine
  53. 17 GROUP ELEMENTS < 02 < N Level - 1 51. The correct increasing order of bond dissociation energy for NY 02, F2, C12 is 1)N2 < 02 < < C12 < C12 < C12 < C12 2 2 2
  54. 17 GROUP ELEMENTS 52. The halogen which is most easily reduced is Level - 1 2) C12 3) Br2 4) 12 olution : Fluorine acts as strongest oxidising agent. So it is easily reduced
  55. 17 GROUP ELEMENTS Level - 1 53. Fluorine is better oxidising agent than Bry It is due to 1) Small size of fluorine 2) More electron repulsion in fluorine ore electro negative of fluorine 4) Non metallic nature of fluorine
  56. 17 GROUP ELEMENTS Level - 1 54. Ozonised oxygen can be obtained form H20 by the action of 1) Conc. H2S04 3) Mnoå- olution : 2) KMn04 The mixture of 02 and 03 is called Ozonised oxygen 2F2+2H20 -+ 4HF +02 3F2+3H20 6HF +03
  57. 17 GROUP ELEMENTS Level - 1 55. Which one of the following elements can have both positive and negative oxidation state ? olution : Due to the presence of empty d- orbitals
  58. 17 GROUP ELEMENTS Level - 1 56. The correct order of increasing oxidizing power is Solution : From top to bottom oxidizing power decreases.
  59. 17 GROUP ELEMENTS 57. The T- shaped interhalogen compound is Level - 1 CIF3 3) CIF3 olution : 2) ICI 4) IFS
  60. 17 GROUP ELEMENTS 58. Fluorine reacts with water to give 1) HF and 02 3) HF and 03 Solution : 2F2+2H20 -+ 4HF +02 3F2+3H20 6HF +03 Level - 1 2) I-IF and OF2 , 2 and 03
  61. 17 GROUP ELEMENTS Level - 1 59. Fluorine is stronger oxidizing agent. This is attributed to many factors except 1) Heat of dissociation 2) Reduction potential Ionization potential 4) Heat of hydration
  62. 17 GROUP ELEMENTS Level - 1 60. The acid which cannot be kept in glass bottle is VHF 3) HBr olution : HF reacts with glass bottle 2) HCI 4) HI
  63. 17 GROUP ELEMENTS 61. HF is not stored in glass bottle because 1) It reacts with visible part of light 2) It reacts with sodium oxide of the glass Level - 1 3) It reacts with the aluminum oxide of the glass It reacts with Si02 of the glass
  64. 17 GROUP ELEMENTS 62. The high oxidizing power if F2 is due to Level - 1 1) High heat of hydration and high heat of dissociation 41igh heat of hydration and low heat of dissociation 3) Low heat of hydration and high heat of dissociation 4) High electron affinity Solution : Fluorine having high heat of hydration and low heat of dissociation
  65. 17 GROUP ELEMENTS Level - 1 63. Correct order of boiling points of hydrogen halides is 1) HF > I-ICI > 1--1Br > HI HCI < HBr < HI < I-IF olution : 2) 1--1F > HCI > HBr < HI 4) I-IF < HBr < HI < I-ICI From top to bottom B.P increases, but due to hydrogen bonds HF has more B.P
  66. 17 GROUP ELEMENTS 64. Which one of the halogen acid is a liquid ? Level - 1 2) HCI 4) HI 3) HBr Solution : Because of hydrogen bonding HF exists as liquid state.
  67. 17 GROUP ELEMENTS Level - 1 Thank you...

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