The dominance of acidity creates toxicity?

Related Mcqs:

1. 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

2. Which of the following fertilizers show maximum residual acidity with the continuous soil application:

   A. Urea
   B. Ammonium nitrate
   C. Ammonium sulphate
   D. Calcium ammonium nitrate

   Submitted by: Shafiq Rehman

3. The unit of a scale used to measure the level of acidity or alkalinity of chemicals is called:

   A. Ec
   B. pH
   C. Pascal
   D. None of the above

   Submitted by: Shafiq Rehman

4. Main product of photosynthesis is_____________________?

   A. C6H12O6
   B. C12H24O12
   C. C3H6O6
   D. C5H12O6

5. pH of Pakistani soils is____________________?

   A. 7.5
   B. 12
   C. 7
   D. 14

6. Soil particles having diameter greater than 2 mm are called___________________?

   A. Clay
   B. Silt
   C. Sand
   D. Gravel

7. If the chlorophyll content in plant increases, the solar radiation transmitted:

   A. Increases
   B. Decreases
   C. Constant
   D. None of these

   Submitted by: Shafiq Rehman

8. According to one estimate, wind and water erosion over ______ % of the Pakistan’s total area?

   A. 46%
   B. 36%
   C. 76%
   D. None of the above

   Submitted by: Shafiq Rehman

9. Browning disease of rice is a_________?

   A. Bacterial & fungal disease
   B. Physiological disease
   C. Viral disease
   D. The above statement is wrong

   Submitted by: Shafiq Rehman

10. In Pakistan, Nitrophos is manufactured in_________?

    A. Multan
    B. Sawat
    C. Lasbella
    D. Shikarpoor

    Submitted by: Shafiq Rehman