Chemistry : Organic Chemistry – Some Basic Principles and Techniques

The structure of isobutyl group in an organic compound is

Which of the statements is not true?

• On passing H₂S through acidified K₂Cr₂O₇ solution, milky colour is observed.

• Na₂Cr₂O₇ is preferred over K₂Cr₂O₇ in volumetric analysis

• Na₂Cr₂O₇ solution in acidic medium is orange

• K₂Cr₂O₇ solution becomes yellow on increasing the pH beyond 7

Which nomenclature is not according to IUPAC system?

Sulphur trioxide can be obtained by which of the following reaction

Considering the state of hybridization of carbon atoms, find out the molecule among the following which is linear.

• CH₃ - C ≡ C - CH₃

• CH₂ = CH - CH₂ - C ≡ CH

• CH₃ - CH₂ - CH₂ - CH₃

• CH₃ - CH₂ - CH₂ - CH₃

The Lassaigne's extract is boiled with conc HNO₃ while testing for halogens. By doing so it

• helps in the precipitation of AgCl

• increases the solubility product of AgCl

• increases the concentration of NO₃^- ions

• increases the concentration of NO₃^- ions

The correct IUPAC name of the compound of 

• 3 - ethyl - 4 ethenyl heptane

• 3 - ethyl - 4 - propylhex- 5-ene

• 3-(1-ethyl propyl) hex - 1 ene

• 3-(1-ethyl propyl) hex - 1 ene

Which one of the following is most reactive towards electrophilic reagents?

Which of the following statement is correct for a nucleophile? 

• Nucleophile is s Lewis acid

• Ammonia is a nucleophile

• Nucleophiles attack low electrons density sites

• Nucleophiles attack low electrons density sites

The number of structural isomers possible from the molecular formula C₃H₉N is 

• 4

• 5

• 2

• 2