What is the concentration of pure water?

Related Mcqs:

1. If a pure tall plant is crossed with a pure dwarf one, the ratio of tall pure dwarf in the F 2 generation after selling F1 plant will be___________________?

   A. 1:1
   B. 1:2
   C. 2:1
   D. 3:1

2. Pure water has an water activity (Aw) of___________________?

   A. 0.99
   B. 1.00
   C. 1.5
   D. non of these

3. An atmosphere with reduced concentration of O2 and increased concentration of CO2 is called_______________?

   A. Refrigeration
   B. Oxidation
   C. Humidity control
   D. Controlled atmosphere

4. Boron concentration is irrigation water is considered safe only upto_________________?

   A. 0.7 ppm
   B. 1.5 ppm
   C. 2 ppm
   D. 3 ppm

5. Pure line theory was developed by_______________?

   A. Thoday (1960)
   B. Mather (1951)
   C. Allard (1957)
   D. Johannsen (1903)

6. The most abundant metal in the earth’s crust and toxic to plants in low concentration is____________________?

   A. Mo
   B. Al
   C. Fe
   D. All the above

7. Sewage water consists of water and solids in the following percentage___________________?

   A. 99 & 1
   B. 90 & 10
   C. 80 & 20
   D. None of the above

8. Water occupied the larger soil pores and moves down readily under the force of gravity. Water in excess of the field capacity is termed:

   A. Capillary water
   B. Hygroscopic water
   C. Gravitational water
   D. None of the above

   Submitted by: Shafiq Rehman

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. 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