Biomolecules · JEE Main previous year questions

2012 2 questions

1. Q682012 · 12 May 2012 · Shift 1

   The difference between the reaction enthalpy change (${\Delta }_{r}H$) and reaction internal energy change (${\Delta }_{r}U$) for the reaction: $2{\mathrm{C}}_6{\mathrm{H}}_6(\mathrm{l})+15{\mathrm{O}}_2(\mathrm{g})⟶12C{\mathrm{O}}_2(\mathrm{g})+6{\mathrm{H}}_2\mathrm{O}(\mathrm{l})$ at $300\mathrm{K}$ is ($R=8.314\mathrm{J}\mathrm{mo}{\mathrm{l}}^{-1}{\mathrm{K}}^{-1}$)

   1. A.$0\mathrm{J}\mathrm{mo}{\mathrm{l}}^{-1}$
   2. B.$2490\mathrm{J}\mathrm{mo}{\mathrm{l}}^{-1}$
   3. C.$-2490\mathrm{J}\mathrm{mo}{\mathrm{l}}^{-1}$
   4. D.$-7482\mathrm{J}\mathrm{mo}{\mathrm{l}}^{-1}$
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   Answer: D

2. Q802012 · 7 May 2012 · Shift 1

   All of the following statements apply to proteins except

   1. A.Proteins generally have no definite melting point
   2. B.Proteins contain the grouping $-\mathrm{CONH}-$
   3. C.Proteins have high molecular weight
   4. D.Proteins can only contain the elements C, H, O and N.
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   Answer: D