Which element is known as chemical police man of plant?

Related Mcqs:

1. The seventieth element included in the list of essential nutrient element is:__________?

   A. Vanadium
   B. Cobalt
   C. Sodium
   D. Nickle

   Submitted by: Shafiq Rehman

2. The study of relationship between soil properties & plant production is known as:_________?

   A. Pedology
   B.  Soil Science
   C. Agronomy
   D. None of these

   Submitted by: Shafiq Rehman

3. Which element can be fixed by smecitite___________________?

   A. Mgº
   B. Kº
   C. NH2
   D. Both b & c

4. The nutrient element silicon (Si) is:_________?

   A. Beneficial
   B. Harmful
   C. Both a and b
   D. None of the above

   Submitted by: Shafiq Rehman

5. Element responsible pollen grain of plant__________?

   A. N
   B. P
   C. K
   D. B

   Submitted by: Hakeem Taj Shapuki

6. Which element is found highest in earth crust?

   A. Aluminum
   B. Silicon
   C. Sodium
   D. None of the above

   Submitted by: Shafiq Rehman

7. Essentiality criteria of an element :

   A. In the absence of an element, its not possible for plant to complete its vegetative cycle.
   B. The role played by an element is specific & can not be replaced by another element.
   C. The element is directly involved in the nutrition of the plant.
   D. All of these

   Submitted by: Shafiq Rehman

8. The exact chemical formula of DAP fertilizer is___________________?

   A. (NH2) HPO4
   B. NH4H2PO4
   C. NH4H2PO4
   D. Both a & c

9. 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

10. Chemicals, used for controlling the disease of crops, fruits & vegetables is___________ & chemical prepared for controlling insect-pests ——————-:

    A. Insecticides—Herbicides
    B. Fungicides—Insecticides
    C. Weedicides—insecticides
    D. None of the above

    Submitted by: Shafiq Rehman