Other Chemistry · JEE Main previous year questions

2015 6 questions

1. Q612015 · 4 Apr 2015 · Shift 1

   Which of the following is the energy of a possible excited state of hydrogen?

   1. A.–6.8 eV
   2. B.–3.4 eV
   3. C.+6.8 eV
   4. D.+13.6 eV
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   Answer: B

2. Q632015 · 4 Apr 2015 · Shift 1

   The intermolecular interaction that is dependent on the inverse cube of distance between the molecule is:

   1. A.ion-dipole interaction
   2. B.London force
   3. C.hydrogen bond
   4. D.ion-ion interaction
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   Answer: C

3. Q712015 · 4 Apr 2015 · Shift 1

   Higher order (>3) reactions are rare due to

   1. A.increase in entropy and activation energy as more molecules are involved
   2. B.shifting of equilibrium towards reactants due to elastic collisions
   3. C.loss of active species on collision
   4. D.low probability of simultaneous collision of all the reacting species
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   Answer: D

4. Q762015 · 4 Apr 2015 · Shift 1

   The colour of $\mathrm{KMn}{\mathrm{O}}_4$ is due to :

   1. A.$\mathrm{d}-\mathrm{d}\mathrm{transition}$
   2. B.$\mathrm{L}\to \mathrm{M}\mathrm{charge}\mathrm{transfer}\mathrm{transition}$
   3. C.$\sigma -{\sigma }^{\ast }\mathrm{transition}$
   4. D.$\mathrm{M}\to \mathrm{L}\mathrm{charge}\mathrm{transfer}\mathrm{transition}$
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   Answer: B

5. Q842015 · 4 Apr 2015 · Shift 1

   From the following statements regarding ${\mathrm{H}}_2{\mathrm{O}}_2$, choose the incorrect statement :

   1. A.It decomposes on exposure to light
   2. B.It has to be stored in plastic or wax lined glass bottles in dark
   3. C.It has to be kept away from dust
   4. D.It can act only as an oxidizing agent
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   Answer: D

6. Q882015 · 4 Apr 2015 · Shift 1

   Which among the following is the most reactive?

   1. A.$\mathrm{B}{\mathrm{r}}_2$
   2. B.${\mathrm{I}}_2$
   3. C.$\mathrm{ICl}$
   4. D.$\mathrm{C}{\mathrm{l}}_2$
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   Answer: C