General Organic Chemistry & Isomerism · JEE Main previous year questions

2004 7 questions

1. Q1712004 · 24 Apr 2004 · Shift 1

   Which of the following will have meso-isomer also?

   1. A.2-chlorobutane
   2. B.2-hydroxypropanoic acid
   3. C.2,3-dichloropentane
   4. D.2,3-dichlorobutane
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   Answer: D

2. Q1732004 · 24 Apr 2004 · Shift 1

   Which of the following compound is not chiral?

   1. A.1- chloropentane
   2. B.3-chloro-2- methyl pentane
   3. C.1-chloro -2- methyl pentane
   4. D.2- chloropentane
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   Answer: A

3. Q1762004 · 24 Apr 2004 · Shift 1

   For which of the following parameters the structural isomers ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ and $\mathrm{C}{\mathrm{H}}_3\mathrm{OC}{\mathrm{H}}_3$ would be expected to have the same values? (Assume ideal behaviour)

   1. A.Heat of vaporization
   2. B.Gaseous densities at the same temperature and pressure
   3. C.Boiling points
   4. D.Vapour pressure at the same temperature
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   Answer: B

4. Q2062004 · 24 Apr 2004 · Shift 1

   The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is

   1. A.$\mathrm{F}{\mathrm{e}}_4[\mathrm{Fe}(\mathrm{CN}{)}_6{]}_3$
   2. B.$\mathrm{N}{\mathrm{a}}_4[\mathrm{Fe}(\mathrm{CN}{)}_5\mathrm{NOS}]$
   3. C.$\mathrm{Fe}(\mathrm{CN}{)}_3$
   4. D.$\mathrm{N}{\mathrm{a}}_3[\mathrm{Fe}(\mathrm{CN}{)}_6]$
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   Answer: A

5. Q2082004 · 24 Apr 2004 · Shift 1
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: A

6. Q2102004 · 24 Apr 2004 · Shift 1
   
   1. A.$3,3$-dimethyl - $1$ - cyclohexanol
   2. B.$1,1$-dimethyl- $3$ -hydroxy cyclohexane
   3. C.$3,3$-dimethyl- $1$ -hydroxy cyclohexane
   4. D.$1,1$-dimethyl - $3$ - cyclohexanol
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   Answer: A

7. Q2212004 · 24 Apr 2004 · Shift 1

   The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey power. The transformation is related to :

   1. A.a change in the partial pressure of oxygen in the air
   2. B.a change in the crystalline structure of tin
   3. C.an interaction with nitrogen of the air at very low temperature
   4. D.an interaction with water vapor contained in the humid air
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   Answer: B