General Organic Chemistry & Isomerism · JEE Main previous year questions

2005 6 questions

1. Q1692005 · 28 Apr 2005 · Shift 1

   Due to the presence of an unpaired electron, free radicals are:

   1. A.Chemically reactive
   2. B.Chemically inactive
   3. C.Anions
   4. D.Cations
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   Answer: A

2. Q1722005 · 28 Apr 2005 · Shift 1

   Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is

   1. A.n-hexane
   2. B.2, 3-dimethylbutane
   3. C.2,2-dimethylbutane
   4. D.2-methylpentane
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   Answer: B

3. Q1742005 · 28 Apr 2005 · Shift 1

   Which types of isomerism is shown by 2,3-dichlorobutane?

   1. A.Diastereo
   2. B.Optical
   3. C.Geometric
   4. D.Structural
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   Answer: B

4. Q1892005 · 28 Apr 2005 · Shift 1

   Which of the following compounds shows optical isomerism?

   1. A.$[\mathrm{Cu}(\mathrm{N}{\mathrm{H}}_3{)}_4{]}^{+2}$
   2. B.$[\mathrm{ZnC}{\mathrm{l}}_4{]}^{-2}$
   3. C.$[\mathrm{Cr}({\mathrm{C}}_2{\mathrm{O}}_4{)}_3{]}^{-3}$
   4. D.$[\mathrm{Co}(\mathrm{CN}{)}_6{]}^{-3}$
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   Answer: C

5. Q2022005 · 28 Apr 2005 · Shift 1
   
   1. A.$(C),(B),(A),(D)$
   2. B.$(B),(C),(A),(D)$
   3. C.$(D),(C),(B),(A)$
   4. D.$(A),(B),(C),(D)$
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   Answer: A

6. Q2192005 · 28 Apr 2005 · Shift 1

   The correct order of the thermal stability of hydrogen halides (H – X) is :

   1. A.HI > HBr > HCl > HF
   2. B.HF > HCl > HBr > HI
   3. C.HCl < HF > HBr < HI
   4. D.HI > HCl < HF < HBr
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   Answer: B