Other Chemistry · JEE Main previous year questions

2012 28 questions

1. Q812012 · 7 May 2012 · Shift 1

   In which of the following arrangements, the sequence is not strictly according to the property written against it?

   1. A.$\mathrm{C}{\mathrm{O}}_2<\mathrm{Si}{\mathrm{O}}_2<\mathrm{Sn}{\mathrm{O}}_2<\mathrm{Pb}{\mathrm{O}}_2$ : increasing oxidising power
   2. B.$\mathrm{N}{\mathrm{H}}_3<\mathrm{P}{\mathrm{H}}_3<\mathrm{As}{\mathrm{H}}_3<\mathrm{Sb}{\mathrm{H}}_3$ : increasing basic strength
   3. C.$\mathrm{HF}<\mathrm{HCl}<\mathrm{HBr}<\mathrm{HI}$ : increasing acid strength
   4. D.$\mathrm{B}<\mathrm{C}<\mathrm{O}<\mathrm{N}$ : increasing first ionisation enthalpy
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   Answer: B

2. Q842012 · 7 May 2012 · Shift 1

   Which of the oxide groups among the following cannot be reduced by carbon?

   1. A.$\mathrm{C}{\mathrm{u}}_2\mathrm{O},\mathrm{Sn}{\mathrm{O}}_2$
   2. B.$\mathrm{CaO},{\mathrm{K}}_2\mathrm{O}$
   3. C.$\mathrm{PbO},\mathrm{F}{\mathrm{e}}_3{\mathrm{O}}_4$
   4. D.$\mathrm{F}{\mathrm{e}}_2{\mathrm{O}}_3,\mathrm{ZnO}$
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   Answer: B

3. Q862012 · 7 May 2012 · Shift 1

   Among the following which is the best description of water in the solid phase?

   1. A.Covalent solid
   2. B.Molecular solid
   3. C.Ionic solid
   4. D.Network solid
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   Answer: B