Fe is trivalent in which of the chemical compound:

Related Mcqs:

1. A compound or a chemical substance which is essential for maintenance of body and has a specific role in nourishment if called ____________________?

   A. Ingredient
   B. Component
   C. Constituent
   D. Nutrient

2. Which compound is mostly used in Pakistan for the reclamation of saline-sodic & sodic soils_________________?

   A. Apatite
   B. Calcite
   C. Dolomite
   D. Gypsum

3. A compound toxic to crop formed by the thermal decomposition of urea is_________________?

   A. Uric acid
   B. Biurct (NH2CONH CONH2 H2O)
   C. Diuret
   D. Both b & c

4. Which compound decay slowly______________________?

   A. Amino acid
   B. Lignin
   C. fats
   D. Cellulose

5. Most abundant organic compound in nature?

   A. Cellulose
   B. Hemicellulose
   C. Lignin
   D. All of these

   Submitted by: Shafiq Rehman

6. Organisms satisfying their carbon requirement as Co2 from atmosphere and energy requirement from oxidation of simple inorganic compound are called as_________?

   A. Chemoautotroph
   B. Photoautotroph
   C. Saprophyte
   D. None of these

   Submitted by: Shafiq Rehman

7. Moderately toxic compound:_________?

   A. Lead
   B. Fluorine
   C. Nickle
   D. All of the above

   Submitted by: Shafiq Rehman

8. A controlled oxidation process by which all organisms ultimately obtain the energy stored in organic compound is known as_______________?

   A. Oxidation
   B. Transportation
   C. Respiration
   D. Both a & b

9. The chemical formula of Hematite is_____________________?

   A. AL (OH)2
   B. Fe2O3
   C. Fe OOH
   D. None of the above

10. Which chemical used to prevent evaporation from surface of water in water bodies?

    A. Cetyle alcohol
    B. Methyle alcohol
    C. both A and B
    D. None of these

    Submitted by: Shafiq Rehman