Questions asked by Sana Z.

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• How will you obtain benzene from ethyl alcohol ?
  
• Why is phenol more soluble in water than toluene ?
  
• How can nucleophilic addition of a primary amine give an imine ?
  
• Why tertiary alkyl halides give #"S"_"N"1# reactions mostly ?
  
• Why group 1 elements are also called alkali metals ?
  
• What is the difference between oxides , peroxides and superoxides ?
  
• What is the wavelength range of the ordinary infrared region ? a.0.8-2.5 μm b. 2.5-16 μm c. 16-1000 μm d. 400-800 nm
  
• Which region of the electromagnetic spectrum is involved in mass spectroscopy ? a. visible. b. radiowave c. microwave d. none of these
  
• Mass spectroscopy is an analytical technique which involves ? a. production of gaseous ions from a sample b. separation of the gaseous ions c. measurement of the relative abundance of the gaseous ions d. all of the above
  
• Far ultraviolet region generally lies between? a. 10-200 nm b. 200-400 nm c. 400-750 nm d. 300-500 nm
  
• If 'g' is the acceleration due to gravity on earth then increase in P.E of a body of mass 'm' up to a distance equal to the radius of earth from the earth surface will be ?
  
• What is the relation between kinetic energy and momentum ?
  
• Why can't the essential amino acids be produced in the body even though they are coded by the DNA?
  
• Why most fatty acids have even number of carbon atoms?