Chemical Bonding · JEE Main previous year questions

2002 5 questions

1. Q1532002 · 27 Apr 2002 · Shift 1

   In which of the following species the interatomic bond angle is $109^{\circ }28^{\prime }$ ?

   1. A.$\mathrm{N}{\mathrm{H}}_3,\mathrm{B}{\mathrm{F}}_4^{-}$
   2. B.$\mathrm{N}{\mathrm{H}}_4^{+},\mathrm{B}{\mathrm{F}}_4^{-}$
   3. C.$\mathrm{N}{\mathrm{H}}_3,\mathrm{B}{\mathrm{F}}_3$
   4. D.$\mathrm{N}{\mathrm{H}}_2^{-1},\mathrm{B}{\mathrm{F}}_3$
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   Answer: B

2. Q1552002 · 27 Apr 2002 · Shift 1

   Hybridisation of underlined atom changes in

   1. A.$\underline{\mathrm{Al}}{\mathrm{H}}_3$ changes to $\mathrm{Al}{\mathrm{H}}_4^{-}$
   2. B.${\mathrm{H}}_2\underline{\mathrm{O}}$ changes to ${\mathrm{H}}_3{\mathrm{O}}^{+}$
   3. C.$\underline{\mathrm{N}}{\mathrm{H}}_3$ changes to $\mathrm{N}{\mathrm{H}}_4^{+}$
   4. D.in all cases
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   Answer: A

3. Q1692002 · 27 Apr 2002 · Shift 1

   In which of the following species is the underlined carbon having $\mathrm{s}{\mathrm{p}}^3$ hybridisation?

   1. A.$\mathrm{C}{\mathrm{H}}_3\underline{\mathrm{C}}\mathrm{OOH}$
   2. B.$\mathrm{C}{\mathrm{H}}_3\underline{\mathrm{C}}{\mathrm{H}}_2\mathrm{OH}$
   3. C.$\mathrm{C}{\mathrm{H}}_3\underline{\mathrm{C}}\mathrm{OC}{\mathrm{H}}_3$
   4. D.$\mathrm{C}{\mathrm{H}}_2=\underline{\mathrm{C}}\mathrm{H}-\mathrm{C}{\mathrm{H}}_3$
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   Answer: B

4. Q2202002 · 27 Apr 2002 · Shift 1

   In $\mathrm{Xe}{\mathrm{F}}_2,\mathrm{Xe}{\mathrm{F}}_4,\mathrm{Xe}{\mathrm{F}}_6$ the number of lone pairs of Xe are respectively :

   1. A.2, 3, 1
   2. B.1, 2, 3
   3. C.4, 1, 2
   4. D.3, 2, 1
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   Answer: D

5. Q2222002 · 27 Apr 2002 · Shift 1

   Number of sigma bonds in ${\mathrm{P}}_4{\mathrm{O}}_{10}$ is :

   1. A.6
   2. B.7
   3. C.17
   4. D.16
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   Answer: D