The radio-active element used in heart pacemakers is ___________?

Related Mcqs:

1. When an active metal like Al comes in contact with less active element like Cu then it produces__________________?

   A. dry cell
   B. galvanic cell
   C. electrolytic cell
   D. A and B

2. 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

3. According to Journal of Biological Chemistry 158, human brain and heart are composed of ________water?

   A. 75%
   B. 81%
   C. 73%
   D. 89%

   Submitted by: Haroon Akhtar

4. The boiling point increases down the zero group element due to_________________?

   A. Ion dipole forces
   B. London forces
   C. Hydrogen bonding
   D. Dipole dipole forces

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. 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

7. Which electronic configuration corresponds to an element of group IIIA ?

   A. 1s2 2s2 2p3
   B. 1s2 2s2 2p6 3s2 3p1
   C. 1s2 2s2 2p4
   D. 1s2 2s2 2p6 3s2 3p6 4s2 3d1

8. Which element can form tripositive ion ?

   A. Beryllium
   B. Carbon
   C. Silicon
   D. Aluminium

9. The element of group VIA which is a non-metal is________________?

   A. S
   B. Se
   C. Te
   D. Po

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

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

    Submitted by: Ayyan Khan