Which compound decay slowly______________________?

Related Mcqs:

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

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

2. 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

3. Most abundant organic compound in nature?

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

   Submitted by: Shafiq Rehman

4. Fe is trivalent in which of the chemical compound:

   A. Fe (NO₃)₃
   B. Fe₂ (NO₃)₃
   C. Fe₃ (NO₂)
   D. None of these

   Submitted by: Shafiq Rehman

5. 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

6. Moderately toxic compound:_________?

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

   Submitted by: Shafiq Rehman

7. 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

8. 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

9. The toxicity level of Zn (mg/kg) in plants suggested by some workers is___________________?

   A. > 50 mg kg-1
   B. > 10 mg-1
   C. > 400 mg kg-1
   D. None of these

10. While diluting acid always add_____________________?

    A. Acid to water
    B. Water to acid
    C. Both a & b
    D. none