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

Related Mcqs:

1. Most abundant mineral in the earth crust is______________________?

   A. N-Feldspar
   B. Feldspar
   C. S-Feldspar
   D. Amplubole

2. Fine-graned rocks formed on earth crust are called____________________?

   A. Intensive igneous rock
   B. Extrusive rock
   C. Sedimentary rock
   D. Plutonic

3. Potassium (K) occurs as a constituent of the earth’s crust in the proportion of_________?

   A. 23 %
   B. 2.3 %
   C. 17 %
   D. 1.7 %

   Submitted by: Shafiq Rehman

4. Oxygen and Silicon together comprise approximately ______ %of the earth crust?

   A. 64 %
   B. 79 %
   C. 75 %
   D. 73 %

   Submitted by: Shafiq Rehman

5. The relative abundance of three types of rocks ( igneous-metamorphic- sedimentary) in the earth’s crust is_________?

   A. 12.5 % -12.5 % – 75%
   B. 64.7 % – 27.4 % – 7.9 %
   C. none of A & B
   D. 7.9% – 27.7 % – 64.4

   Submitted by: Shafiq Rehman

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. After self pollination of red flowered plants out of 40 plants of progeny were white flowered. this indicates that the plants are__________________?

   A. Heterogeneous
   B. Heterozygous
   C. Homogenous
   D. Homozygous

8. The deficient level of N (%) in plants suggested by various workers is____________________?

   A. 0%
   B. 3%
   C. 5%
   D. 10%

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

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

10. The most highly advanced division in plants kingdom is____________________?

    A. Pteridophtes
    B. Tracheophyta
    C. Taxonomy
    D. None of the above