Chemistry : Organic Chemistry – Some Basic Principles and Techniques

Duma's method involves the determination of nitrogen content in the organic compound in the form of

• NH₃

• N₂

• NaCN

• (NH₄)₂SO₄

In Duma's method of estimation of nitrogen, 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (Aqueous tension at 300 K = 15 mm)

• 16.45

• 17.45

• 14.45

• 15.45

Which of the following is not correct?

• Ammonia is used as refrigerant

• A mixture of Ca(CN)₂ and C is known as nitrolim

• A mixture of Ca(H₂PO₄),% and CaSO₄.2H₂0 is known as superphosphate of lime

• Hydrolysis of NCl₃ gives NH₃ and HOCl

Which one of the following is aromatic?

• Cyclopentadienyl cation

• Cyclooctatetraene

• Cycloheptatriene

• Cycloheptatrienylcation

The complexes [Co(NH₃)₆][Cr(CN)₆] and [Cr(NH₃)₆][Co(CN)₆] are the examples of which type of isomerism?

• Ionisation isomerism

• Coordination isomerism

• Geometrical isomerism

• Linkage isomerism

Which of the following compounds is soluble in benzene but almost insoluble in water?

• C₂H₅OH

• CH₃CO₂H

• CH₃CHO

• C₆H₅NO₂

What is product of the following sequence of reactions?

The chemical formulae of X, Y and Z are

• X	Y	Z
  CaO	Ca(OH)2	NaOH

• NaOH

  CaO

  CaCO3

• NaOH

  Ca(OH)2

  CaCO3

• Ca(OH)2

  NaOH

  CaCO3

What is correct about the following structure?

• Total stereoisomers = 4

• Number of chiral carbons = 1

• Number of optical isomers= 2

• Number of meso compounds = 2

During estimation ofnitrogen in the organic compound by Kjeldahl's method, the ammonia evolved from 0.5 g of the compound in Kjeldahl's estimation of nitrogen, neutralised 10 mL of 1M H₂SO_4^. Find out the percentage of nitrogen in the compound.

• 14%

• 28%

• 56%

• 68%