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18 Group Elements

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Published in: Chemistry
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PPTs on 18 Group Elements which help to understand chapter .

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. GROUP 18 ELEMENTS
  2. 18th GROUP ELEMENTS XENON-FLUORIDES
  3. 18th GROUP ELEMENTS XENON-FLUORIDES D Forms three crystalline solids with fluorine. Xenon di fluoride ( xeF2) Xenon tetra fluoride (XeF4) Xenon hexa fluoride (XeF6)
  4. 18th GROUP ELEMENTS XENON-FLUORIDES Xenon fluorides are prepared by direct heating of elements by taking roper proportions in a sealed n kel tube.
  5. 18th GROUP ELEMENTS XENON-FLUORIDES XeF2 : Preparation : 673K Xe (g) + F XeF2 (s) 2 (g) 1 bar Excess
  6. 18th GROUP ELEMENTS XENON-FLUORIDES XeF2 : Chemical properties It reacts with fluoride ion acceptors to form cationic species. xeF2 + [XeF+] [PF6 F It undergoes hydrolysis readily even by the presence of a trace of water 2XeF +2HO 2Xe(g) + 4HF + 02 (g)
  7. 18th GROUP ELEMENTS XENON-FLUORIDES XeF2 : Structure It is a linear molecule with sp3d - hybridization of the central atom in the first excited state Bond angle in xeF2 is 1800. XeF2 has 2 bond pairs and 3 lone pairs on the central atom. Oxidation state of Xe is +2 in XeF2
  8. 18th GROUP ELEMENTS Xenon compound Oxidation state of Xe Hybridization No. of o bonds No. of Tt bonds xeF2 Total no.of bond pairs of Xe No.of lone pairs of Xe Shape +2 sp3d 2 2 3 Linear
  9. 18th GROUP ELEMENTS XENON-FLUORIDES XeF2 : Structure Bond angle is 1800 Linear structure of Xenon difluoride (XeF2)
  10. 18th GROUP ELEMENTS 1) The number of lone pairs and bond pairs present on Xe of XeF2 is...
  11. 18th GROUP ELEMENTS 2) The Hybridization & shape of XeF2 molecule is... a) sp3d ; trigonal planar b) sp3d2 ; octahydral c) sp3d ; tetra hydral sp3d ; linear
  12. 18th GROUP ELEMENTS 3) The number of & It bonds present in XeF2 molecule is...
  13. 18th GROUP ELEMENTS 4) Which of the following has the highest bond angle? b) xeF4 c) xeF6 d) xe02
  14. 18th GROUP ELEMENTS XENON-TETRA FLUORIDE
  15. 18th GROUP ELEMENTS XENON-FLUORIDES XeF4 : Preparation : 873K Xe (g) + 2F 2 (g) 7 bar 1:5 ratio xeF4(s)
  16. 18th GROUP ELEMENTS XENON-FLUORIDES XeF4 : Chemical properties It reacts with fluoride ion acceptors to form XeF4 undergoes disproportion reaction with 1-120. xeF4 +SbFs [ XeF3]+ 1- XeF6 can also be prepared by the reaction betwc -2 at 143 K 143 K XeF4 + XeF6(s) + 02
  17. 18th GROUP ELEMENTS XENON-FLUORIDES XeF4 : Chemical properties It undergoes hydrolysis readily even in the presence of a trace of water 6XeF4+ 12H20 4Xe+ 2Xe03+24HF +302
  18. 18th GROUP ELEMENTS XENON-FLUORIDES XeF4 : Structure XeF4 is a square planar molecule with sp3d2 hybridization of the central atom in the second excited state. Bond angle in xeF4 is 900 XeF4 has 4 bond pairs and 2 lone pairs on the central atom. Oxidation state of 'Xe' is +4 in XeF4.
  19. 18th GROUP ELEMENTS XENON-FLUORIDES XeF4 : Structure
  20. 18th GROUP ELEMENTS Xenon compound Oxidation state of Xe Hybridization No. of o bonds No. of Tt bonds xeF4 Total no.of bond pairs of Xe No.of lone pairs of Xe Shape +4 sp3d2 4 4 2 Square planar
  21. 18th GROUP ELEMENTS 1)XeF4 is isostructural with... a) CIF3 b) IF4 *BrF4- d) BrFs
  22. 18th GROUP ELEMENTS 2) The oxidation state of 'Xe' in XeF4 molecule is... +4
  23. 18th GROUP ELEMENTS 3)XeF4 + x + xeF6 +02 V02F2 b) xe03 c) xe04 d) OF2
  24. 18th GROUP ELEMENTS 4) The number of Fluorine atoms in a Xenon compound in which 'Xe' has +4 oxidation state is...
  25. 18th GROUP ELEMENTS XENON-HEXAFLUORIDE
  26. 18th GROUP ELEMENTS XENON-FLUORIDES XeF6 : Preparation 573K 60-70 bar Xe (g) + 3F2 (g) xeF 1:20 ratio Xenon hexa fluoride XeF4+ 02F 143K* + 02
  27. 18th GROUP ELEMENTS XENON-FLUORIDES XeF6 : Chemical properties It reacts with fluoride ion donors to form fluoro anions xeF6 + MF [ Na, K, Rb & Cs ]
  28. 18th GROUP ELEMENTS XENON-FLUORIDES XeF6 : Chemical properties xeF6 on partial hydrolysis gives XeOF4 or Xe02F2 XeF6 + H2() XeOF4 + 2HF XeOF4 +H20 xe02F2 + 2HF On complete hydrolysis xeF6 xe03 + 6HF
  29. 18th GROUP ELEMENTS XENON-FLUORIDES XeF6 : Structure XeF6 is a distorted octahedral molecule with sp3d3 hybridization of the central atom in the third excited state. XeF6 has 6 bond pairs and a lone pair on the central atom. Oxidation state of 'Xe' is +6 in XeF6.
  30. 18th GROUP ELEMENTS XENON-FLUORIDES XeF6 : Structure Shape is distorted octahedron (or) Pentagonal bi pyramidal
  31. 18th GROUP ELEMENTS xeF6 Xenon compound Oxidation state of 'Xe' Hybridization No. of o bonds No. of Tt bonds Total no.of bond pairs of 'Xe No.of lone pairs of 'Xe' Shape +6 sp3d3 6 6 1 Distorted octahedral
  32. 18th GROUP ELEMENTS 1) The structure of XeF6 is... a istorted octahedral b) Tetrahedral c) Pyramidal d) Trigonal
  33. 18th GROUP ELEMENTS 2) XeF6 on partial hydrolysis... a) XeOF4 only b) Xe02F4 c) Both xeF4 and Xe02F2 VXe0F4 or Xe02F2
  34. 18th GROUP ELEMENTS 3) 'Xe' reacts with F2 at high pressure in 1:20 ratio we get... a) xeF2 only b) xeF4 c eF6 d) xeF8
  35. 18th GROUP ELEMENTS 4) In XeF6 molecule, 'Xe' atom undergoes a) sp3d2 hybridization in its 2nd excited state b) sp3d3 hybridization in its 2nd excited state esp3d3 hybridization in its 3rd excited state d) sp3d3 hybridization in its 4th excited state
  36. 18th GROUP ELEMENTS Thank you...

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