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National Open University Exam Past Question – CHM 314 JUNE/JULY EXAMINATION

NATIONAL OPEN UNIVERSITY OF NIGERIA  CHM 314 Environmental Chemistry

14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS SCHOOL OF SCIENCE AND TECHNOLOGY JUNE/JULY EXAMINATION

 

COURSE CODE:   CHM 314

COURSE TITLE:   Environmental Chemistry

TIME ALLOWED: 2 hours

INSTRUCTION:   Answer 4 questions only

 

 

 

  1. The standard method of  sewage     treatment comprises f o u r  s t a g e s  of treatment describe the processes involved in each of these stages.                                  (17½marks)

 

 

2    Discuss the physical parameters that are relevant to the chemistry and analysis of water and how they are measured.                                                                                      (17½marks)

 

3    (a) Explain the term chromatography

(b) Discuss the various classes of chromatography giving examples.                (17½marks)

 

4    Write briefly on the following processes of the Nitrogen Cycle a.      Ammonification

  1. Nitrification
  2. c. Assimilation
  3. Denitrification  (17½marks)

 

  1. The water cycle transfers sun’s  heat  energy  to  various  places, moves contamination or pollution round the planet a nd i s connected to every living thing”. Expatiate.

(17½marks)

 

  1. 6. Discuss the following aquatic pollutants a. Eutrophication
  2. Thermal Pollution c.   Crude Oil
  3. Sewage

 

 

 

 

 

 

 

(17½marks)

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