Which element is necessary for normal leaf development ?

Related Mcqs:

1. Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way ?

   A. The nature of its oxides
   B. The charge on its ions
   C. The formula of its oxide
   D. Its number of isotopes

2. The amount of Zinc (at. Wt=65) necessary to produce 224 ml of H2 by the reaction with an acid will be______?

   A. 0.065gm
   B. 0.65gm
   C. 6.5gm
   D. 7.5gm

   Submitted by: Muhammad Ali Kunbhar

3. The element cesium bears resemblance with________________?

   A. Ca
   B. Cr
   C. Both of the above
   D. None of the above

4. Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?

   A. Lithium
   B. Sodium
   C. Potassium
   D. Rubidium

5. The strength of solution of an element whose electrode potential is to be measured is________________?

   A. 2M
   B. 1N
   C. 1m
   D. 1M

6. E0red of an element cab be calculated by comparing it with _____________________?

   A. New electrode of same element
   B. SHE
   C. 1M solution of ions of respective element
   D. 2M solution of HCI

7. When light is exposed to transition element then electrons jump from lower orbitals to higher orbitals in______________________?

   A. orbitals of f-subshell
   B. orbitals of d-subshell
   C. orbitals of p-subshell
   D. both A & B

8. Halides in which halogen atoms act as a bridge between two atoms of the other element are called___________________?

   A. Covalent halides
   B. Electronegative halides
   C. Polymeric halides
   D. Polymeric hydrides

9. Which of the following element has the maximum electron affinity_____?

   A. Cl
   B. Br
   C. I
   D. F

   Submitted by: Muhammad Ali Kunbhar

10. Element that have same number of neutrons are called__________?

    A. isotope
    B. isobar
    C. isotone
    D. None of these

    Submitted by: Ayyan Khan