General Organic Chemistry & Isomerism · JEE Main previous year questions

2014 3 questions

1. Q662014 · 6 Apr 2014 · Shift 1

   For the estimation of nitrogen, 1.4 g of organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20 ml of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is:

   1. A.3%
   2. B.5%
   3. C.6%
   4. D.10%
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   Answer: D

2. Q782014 · 6 Apr 2014 · Shift 1

   The major organic compound formed by the reaction of 1, 1, 1– trichloroethane with silver powder is:

   1. A.2- Butyne
   2. B.2- Butene
   3. C.Acetylene
   4. D.Ethene
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   Answer: A

3. Q802014 · 6 Apr 2014 · Shift 1

   In the reaction, $$\mathrm{C}{\mathrm{H}}_3\mathrm{COOH}\stackrel{\mathrm{LiAl}{\mathrm{H}}_4}{\to }\mathrm{A}\stackrel{\mathrm{PC}{\mathrm{l}}_5}{\to }\mathrm{B}\underset{\mathrm{BaS}{\mathrm{O}}_4}{\overset{Alc.KOH}{\to }}\mathrm{C},$$ the product C is:

   1. A.Ethylene
   2. B.Acetyl chloride
   3. C.Acetaldehyde
   4. D.Acetylene
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   Answer: A