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1. ÿDraw the Lewis formula for SeF₄. What term describes the shape of this species? (Ans.d)
ÿ ÿ (àÁ×èÍà¢Õ¹ ÊÙµÃÅÔÇÍÔʢͧ SeF₄ áÅéǨÐÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅà»ç¹áººã´)

ÿ ÿ a) ÿ tetragonal pyramid ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ tetrahedral ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ square planar ÿÿÿÿÿÿ
ÿ ÿ d) ÿ see-saw ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ e) ÿ octahedral

2. Draw the Lewis formula for ICl₂^-. What term describes the shape of this species?
ÿ ÿ(Ans.d) (àÁ×èÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧ ICl₂^-. áÅéǨÐÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅà»ç¹áººã´)

ÿ ÿa) ÿ see-saw ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ angular ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ tetrahedral
ÿ ÿd) ÿ linear ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ e) ÿ square planar

3. Draw the Lewis formula for AsCl₄⁺. What term describes the shape of this species?
ÿ ÿ(Ans.d) (àÁ×èÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧ AsCl₄⁺áÅéǨÐÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅà»ç¹áººã´)

ÿ ÿ a) ÿ see-saw ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ angular ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ linear
ÿ ÿ d) ÿ tetrahedral ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ e) ÿ square planar

4. Draw the Lewis formula for NH₂^-. What term describes the shape of this species?
ÿ ÿ(Ans.e) (àÁ×èÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧ NH₂^- áÅéǨÐÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅà»ç¹áººã´)

ÿ ÿ a) ÿ linear ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ square planar ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ see-saw
ÿ ÿ d) ÿ tetrahedral ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿe) ÿ angular

ÿ

ÿ5.ÿ Draw the Lewis formula for SiCl₄. What term describes the shape of this species? ÿ ÿ
ÿ ÿ ÿ(Ans.e) (àÁ×èÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧ SiCl₄ÿ áÅéǨÐÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅà»ç¹áººã´)

ÿ ÿ ÿa) ÿ see-saw ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ octahedral ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿc) ÿ tetragonalpyramid
ÿ ÿ ÿd) ÿ square planar ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ e) ÿ tetrahedral

6.ÿ Draw the Lewis formula for IF₂⁺. What term describes the shape of this species? ÿ ÿ ÿ ÿ ÿ (Ans.e) (àÁ×èÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧ IF₂⁺ÿ áÅéǨÐÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅà»ç¹áººã´)

ÿ ÿ a) ÿ linear ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ square planar ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ see-saw
ÿ ÿ d) ÿ tetrahedral ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿe) ÿ angular

7.ÿ Which of the species in the following list is T-shaped? (Ans.d)ÿ (ÊÒÃã´ºéÒ§ÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅà»ç¹ÃÙ»µÑÇ T)

ÿ ÿ1) ClF₃ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 2) BF₃ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 3) ClO₃^-ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ
ÿ ÿ4)GeCl₃⁺ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ5) SiH₃^-

   a) ÿ 3 only ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ 1 and 3 ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ 3 and 5 
   d) ÿ 1 only ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ ÿÿÿÿÿ e) ÿ 2 and 4

ÿ

8. Which of the species in the following list is trigonal planar? (Ans.d) (ÊÒÃã´ºéÒ§ÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅà»ç¹ÊÒÁàËÅÕèÂÁẹÃÒº)
   1) ClF3ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 2) BF3ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 3) ClO3-ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 4) GeCl3+ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 5) SiH3-
   a) ÿ 1 only ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ 3 only ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ 3 and 5 ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 
   d) ÿ 2 and 4 ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ   e) ÿ 1 and 3

ÿ
9.ÿ Which of the species in the following list is see-saw shaped? (Ans.d) (ÊÒÃã´ºéÒ§ÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅà»ç¹ÃÙ»¡Ãдҹˡ)
    ÿ1) BF4-ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 2) SF4ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 3) XeF4ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 4) SiF4ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 5) PCl4-
     a) ÿ 1 only ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ 3 only ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ 1 and 4 ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ d) ÿ 2 and 5 ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ e) ÿ 1 and 3

10. Draw the Lewis formula for NF₄⁺. What term describes the shape of this species?
ÿ ÿ ÿ(Ans.a)ÿ (àÁ×èÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧ NF₄⁺ áÅéÇÿ ÃÙ»ÃèÒ§âÁàÅ¡ØÅà»ç¹áººã´)
ÿ ÿ ÿa) ÿ tetrahedral ÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ angular ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ linear ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ d) ÿ square planar ÿ ÿ ÿ ÿ ÿ ÿe) ÿ see-saw

11.ÿ Draw the Lewis formula for BrF₄^-. What term describes the shape of this species?
ÿ ÿ ÿ (Ans.a) (àÁ×èÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧ BrF₄^-áÅéÇÿ ÃÙ»ÃèÒ§âÁàÅ¡ØÅà»ç¹áººã´)
ÿ ÿ ÿ ÿa) ÿ square planar ÿÿÿÿÿÿ b) ÿ angular ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ linear ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ d) ÿ tetrahedral ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿe) ÿ see-saw

12. Draw the Lewis formula for GaI₃. What term describes the shape of this species?
ÿ ÿ ÿ(Ans.a) (àÁ×èÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧ GaI₃ áÅéÇÿ ÃÙ»ÃèÒ§âÁàÅ¡ØÅà»ç¹áººã´)
ÿ ÿ ÿa) ÿ planar trigonal ÿÿÿÿÿ b) ÿ T-shaped ÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ trigonal pyramid ÿÿ d) ÿ square planar ÿ ÿ ÿ ÿ
ÿ ÿ ÿe) ÿ tetragonal pyramid

13.ÿ The shape of the reactant containing sulfur in the following reaction is ______ and ÿ ÿ ÿ ÿthat of the product is ______:(Ans.b)
ÿ ÿ ÿ ÿ(ÊÒ÷ÕèÁÕ S ÍÂÙèã¹âÁàÅ¡ØÅÃÐËÇèÒ§·Ò§«éÒ¡Ѻ·Ò§¢ÇҢͧÊÁ¡ÒÃÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅẺã´)

SF₂ + F₂ ÿSF₄

ÿ ÿ ÿ ÿa) ÿ linear, tetrahedral ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ angular, see-saw ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ linear, see-saw
ÿ ÿ ÿ ÿd) ÿ angular, tetrahedral ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ e) ÿ angular, square planar

14.ÿ In the following oxidation reaction the shape of the reactant is ______ and the ÿ
ÿ ÿ ÿ shape of the product is ______:(Ans.b) ÿÿ
ÿ ÿ ÿ (ÊÒ÷ÕèÍÂÙè·Ò§«éÒ¡Ѻ·Ò§¢ÇҢͧÊÁ¡ÒÃÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅẺã´)

SF₄ ÿSF₄²⁺ + 2 e^-

ÿ ÿ ÿa) ÿ tetrahedral, see-saw ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ see-saw, tetrahedralÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
ÿ ÿ ÿc) ÿ tetrahedral, square pyramid ÿ ÿ ÿ d) ÿ square planar, T-shaped ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
ÿ ÿ ÿe) ÿ T-shaped, square planar

15. The shape of the reactant containing chlorine in the following reaction is ______
ÿ ÿ ÿ and that of the product is ______: (Ans.b)
ÿ ÿ ÿ(ÊÒ÷ÕèÁÕÿÿ Cl ÿÍÂÙèã¹âÁàÅ¡ØÅÃÐËÇèÒ§·Ò§«éÒ¡Ѻ·Ò§¢ÇҢͧÊÁ¡ÒÃÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅẺã´)

ClF₃ + F₂ ÿClF₅

ÿ ÿ ÿa) ÿ trigonal planar, square pyramid ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ T-shaped, square pyramid ÿÿÿ
ÿ ÿ ÿc) ÿ trigonal planar, trigonal bipyramid ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿd) ÿ trigonal pyramid, square pyramid
ÿ ÿ ÿe) ÿ T-shaped, trigonal bipyramid

16.ÿ The shape of the reactant containing xenon in the following reaction is ______ and
ÿ ÿ ÿ ÿthat of the product is ______: (Ans.c) (ÊÒ÷ÕèÁÕÿ Xe ÿÍÂÙèã¹âÁàÅ¡ØÅÃÐËÇèÒ§·Ò§«éÒ¡Ѻ
ÿ ÿ ÿ ÿ·Ò§¢ÇҢͧÊÁ¡ÒÃÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅẺã´)

XeF₂ + F_2ÿ ÿXeF₄

ÿ ÿ ÿ a) ÿ angular, tetrahedral ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ linear, see-saw ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
ÿ ÿ ÿ c) ÿ linear, square planar
ÿ ÿ ÿ d) ÿ angular, see-saw ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿe) ÿ linear, tetrahedral

17.ÿ The shape of the reactant containing germanium in the following reaction is ÿ ÿ
ÿ ÿ ÿ ÿ______ and that of the product is ______: (Ans.c)
ÿ ÿ ÿ (ÊÒ÷ÕèÁÕÿ Ge ÿÍÂÙèã¹âÁàÅ¡ØÅÃÐËÇèÒ§·Ò§«éÒ¡Ѻ·Ò§¢ÇҢͧÊÁ¡ÒÃÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅẺã´)

GeCl₃⁺ + Cl^- ÿGeCl₄

ÿ ÿ ÿa) ÿ trigonal pyramid, tetrahedral ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ trigonal planar, square planar ÿÿ
ÿ ÿ ÿc) ÿ trigonal planar, tetrahedral ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ d) ÿ T-shaped, tetrahedral ÿÿÿÿÿÿÿÿÿÿÿÿ
ÿ ÿ ÿe) ÿ trigonal pyramid, square planar

18.ÿ The shape of the reactant containing phosphorus in the following reaction is
ÿ ÿ ÿ ______ and that of the product is ______: (Ans.c)
ÿ ÿ ÿ (ÊÒ÷ÕèÁÕÿ P ÿÍÂÙèã¹âÁàÅ¡ØÅÃÐËÇèÒ§·Ò§«éÒ¡Ѻ·Ò§¢ÇҢͧÊÁ¡ÒÃÁÕÃÙ»ÃèÒ§âÁàÅ¡ØÅẺã´)

PCl₃ + Cl₂ ÿPCl₅

ÿ ÿ ÿa) ÿ trigonal pyramid, square pyramid ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ trigonal planar, trigonal bipyramid
ÿ ÿ ÿc) ÿ trigonal pyramid, trigonal bipyramid ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿd) ÿ T-shaped, trigonal bipyramid
ÿ ÿ ÿe) ÿ T-shaped, square pyramid

19.ÿ Draw the Lewis formula for GaI₃. How many lone pair(s) of electrons are there in
ÿ ÿ ÿ the valence shell of the central atom? (Ans.d)
ÿ ÿ ÿ(àÁÕèÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧÿ GaI₃ áÅéǨ§¾Ô¨ÒóÒÇèÒÁÕÍÔàÅ硵Ã͹¤Ùèâ´´à´ÕèÂÇ·ÕèÍеÍÁ¡ÅÒ§¡Õè¤Ùè)

ÿ ÿ ÿa) ÿ three ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿb) ÿ two ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ c) ÿ four ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿd) ÿ zero ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ e) ÿ one

20.ÿ Draw the Lewis formula for ICl₂^-. How many lone pair(s) of electrons are there in
ÿ ÿ ÿ the valence shell of the central atom? (Ans.d)ÿ
ÿ ÿ ÿ (àÁÕèÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧÿ ICl₂^- áÅéǨ§¾Ô¨ÒóÒÇèÒÁÕÍÔàÅ硵Ã͹¤Ùèâ´´à´ÕèÂÇ·ÕèÍеÍÁ¡ÅÒ§¡Õè¤Ùè)

ÿ ÿ ÿ a) ÿ four ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ b) ÿ two ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿc) ÿ zero ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿd) ÿ three ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ e) ÿ one

21. Draw the Lewis formula for BrF₅. How many lone pair(s) of electrons are there in
ÿ ÿ ÿ the valence shell of the central atom?ÿ (Ans.d)
ÿ ÿ ÿ (àÁÕèÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧÿ BrF₅ áÅéǨ§¾Ô¨ÒóÒÇèÒÁÕÍÔàÅ硵Ã͹¤Ùèâ´´à´ÕèÂÇ·ÕèÍеÍÁ¡ÅÒ§¡Õè¤Ùè)

a) ÿ four ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿb) ÿ three ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ c) ÿ zero ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ d) ÿ one ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿe) ÿ two

22.ÿ Draw the Lewis formula for NF₄⁺. How many lone pair(s) of electrons are there in
ÿ ÿ ÿ the valence shell of the central atom? (Ans.b)
ÿ ÿ ÿ (àÁÕèÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧÿ NF₄⁺ ÿáÅéǨ§¾Ô¨ÒóÒÇèÒÁÕÍÔàÅ硵Ã͹¤Ùèâ´´à´ÕèÂÇ·ÕèÍеÍÁ¡ÅÒ§¡Õè¤Ùè)

ÿ ÿ ÿ a) ÿ one ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ b) ÿ zero ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿc) ÿ four ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ d) ÿ three ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿe) ÿ two

23. Draw the Lewis formula for BrF₅. How many lone pair(s) of electrons are there in
ÿ ÿ ÿthe valence shell of the central atom?ÿ (Ans.b)
ÿ ÿ ÿ(àÁÕèÍà¢Õ¹ÊÙµÃÅÔÇÍÔʢͧÿ BrF₅ áÅéǨ§¾Ô¨ÒóÒÇèÒÁÕÍÔàÅ硵Ã͹¤Ùèâ´´à´ÕèÂÇ·ÕèÍеÍÁ¡ÅÒ§¡Õè¤Ùè)
ÿ ÿ ÿa) ÿ three ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ b) ÿ one ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ c) ÿ zero ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿd) ÿ four ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ e) ÿ two

24.ÿ The bond angles in IF₄^- are: (Ans.c) (ÁØÁÃÐËÇèÒ§¾Ñ¹¸Ðã¹ÿ IF₄^- à»ç¹´Ñ§¢éÍã´)
ÿ ÿ ÿ a) ÿ exactly 120^o ÿÿÿÿÿÿÿÿÿÿ b) ÿ exactly 109.5^o ÿÿÿÿÿÿ c) ÿ exactly 90^oÿÿÿÿÿÿÿÿÿÿÿÿÿ
ÿ ÿ ÿ d) ÿ slightly less than 90^{o ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿÿ}e) ÿ slightly less than 109.5^o

25.ÿ The bond angles in AsCl₄⁺ are: (Ans.c) (ÁØÁÃÐËÇèÒ§¾Ñ¹¸Ðã¹ÿ AsCl₄⁺ à»ç¹´Ñ§¢éÍã´)
ÿ ÿ ÿ a) ÿ exactly 120^o ÿÿÿÿÿÿÿÿÿÿ b) ÿ slightly less than 90^o ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ exactly 109.5^oÿ ÿ ÿ ÿ ÿ
ÿ ÿ ÿ d) ÿ exactly 90^oÿ ÿ ÿ ÿ ÿ ÿ ÿ e) ÿ slightly less than 109.5^o

26.ÿ The bond angles in H₃O⁺ are:ÿ (Ans.c) (ÁØÁÃÐËÇèÒ§¾Ñ¹¸Ðã¹ÿ H₃O⁺ à»ç¹´Ñ§¢éÍã´)
ÿ ÿ ÿ a) ÿ exactly 120^oÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿb) ÿ slightly less than 90^o ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ slightly less than 109.5^o
ÿ ÿ ÿ d) ÿ exactly 90^oÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿe) ÿ exactly 109.5

27.ÿ The bond angles in XeF₄ are: (Ans.e) (ÁØÁÃÐËÇèÒ§¾Ñ¹¸Ðã¹ÿ XeF₄ à»ç¹´Ñ§¢éÍã´)
ÿ ÿ ÿ a) ÿ slightly less than 109.5^o ÿÿÿÿÿÿÿÿÿÿ b) ÿ exactly 109.5^oÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿc) ÿ slightly less than 90^o
ÿ ÿ ÿ d) ÿ exactly 120^oÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ e) ÿ exactly 90^o

^ÿ

28. The bond angles in SnCl₃^- are: (Ans.e) (ÁØÁÃÐËÇèÒ§¾Ñ¹¸Ðã¹ÿ SnCl₃^- ÿà»ç¹´Ñ§¢éÍã´)
ÿ ÿ ÿ a) ÿ slightly less than 90^oÿ ÿ ÿ ÿ ÿ ÿ ÿb) ÿ exactly 109.5^o ÿÿÿÿÿÿ c) ÿ exactly 90^{oÿÿÿÿÿÿÿÿ} ÿd) ÿ exactly 120^o
ÿ ÿ ÿ e) ÿ slightly less than 109.5^o

29. The bond angles in BF₄^- are:ÿ (Ans.e)ÿ (ÁØÁÃÐËÇèÒ§¾Ñ¹¸Ðã¹ÿ BF₄^- à»ç¹´Ñ§¢éÍã´)
ÿ ÿ ÿ a) ÿ slightly less than 109.5^o ÿÿÿÿÿÿÿÿÿÿ b) ÿ exactly 90^oÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿc) ÿ slightly less than 90^o
ÿ ÿ ÿ d) ÿ exactly 120^oÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ e) ÿ exactly 109.5^o

30.ÿ Which of the following has bond angles of approximately 120^o? (Ans.e)
ÿ ÿ ÿ (ÊÒÃã´ºéÒ§ÁÕÁØÁÃÐËÇèÒ§¾Ñ¹¸Ð»ÃÐÁÒ³ÿ 120ÿ ͧÈÒ)
ÿ ÿ ÿ 1) ClF₃ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ2) BF₄^-ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ 3) GeCl₃⁺ÿ ÿ ÿ ÿ ÿ ÿ ÿ 4) PF₅ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ5) GeCl₄
ÿ ÿ ÿ a) ÿ 4 and 5 ÿ ÿ ÿ ÿ ÿ ÿb) ÿ 1 and 5 ÿ ÿ ÿ ÿ ÿ ÿ c) ÿ 1 and 4 ÿÿÿÿ ÿ ÿ ÿ d) ÿ 2 and 3 ÿ ÿ ÿ e) ÿ 3 and 4

ÿ

31.ÿ Which of the following has bond angles of approximately 109.5o? (Ans.e) (ÊÒÃã´ºéÒ§ÁÕÁØÁÃÐËÇèÒ§¾Ñ¹¸Ð»ÃÐÁÒ³ÿ 109.5ÿ ͧÈÒ)
        1) ClF5ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ2) PCl4+ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 3) ClO4-ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 4) SF4ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 5) SiF42-
        a) ÿ 1 and 5 ÿÿÿÿÿÿÿÿÿÿÿÿÿ b) ÿ 3 and 5 ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ c) ÿ 1 and 4 ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ d) ÿ 4 and 5 ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ e) ÿ 2 and 3

32.ÿ Which of the following has bond angles of approximately 120^o? (Ans.e)
ÿ ÿ ÿ (ÊÒÃã´ºéÒ§ÁÕÁØÁÃÐËÇèÒ§¾Ñ¹¸Ð»ÃÐÁÒ³ÿ 120ÿ ͧÈÒ)
ÿ ÿ ÿ 1) ClF₃ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ 2) BF₃ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ 3) ClO₃^-ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ 4) SF₄ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ 5) GeCl₄
ÿ ÿ ÿ a) ÿ 4 only ÿ ÿ ÿ ÿ ÿ ÿ ÿ b) ÿ 5 only ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ c) ÿ 1 and 4 ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿd) ÿ 2 and 3 ÿ ÿ ÿ ÿ ÿ ÿ e) ÿ 2 only

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