| 11. | cation is formed when |
A. atom gains electron | |
B. atom loses electron | |
C. the positive charge on the atom comes from outside | |
D. proton is ejected from the atom |
| 12. | Anion is formed when |
A. atom gains electron | |
B. atom loses electron | |
C. the positive charge on the atom comes from outside | |
D. proton is ejected from the atom |
| 13. | The common name of a compound made up of ions is |
A. electrical connector | |
B. Co-convenor | |
C. deputy co-ordinator | |
D. none of these |
| 14. | An ionic bond is formed when |
A. the combining atoms gain electrons | |
B. combining atoms lose electrons | |
C. A metal is combined with a non-metallic element | |
D. two metallic elements react with each other |
| 15. | Electrovalent bond is formed – |
A. between positive ions | |
B. between anionic ions | |
C. between oppositely charged ions | |
D. none of these |
| 16. | Which of the following compound does not have an ionic bond |
A. potassium nitrate | |
B. Sodium chloride | |
C. calcium chloride | |
D. methane |
| 17. | Which of the following molecules has an electrovalent bond |
A. carbon tetrachloride | |
B. nitrogen atom | |
C. methane | |
D. calcium chloride |
| 18. | Which of the following has electrovalent bond |
A. oxygen molecule | |
B. Methane | |
C. nitrogen atom | |
D. sodium bromide |
| 19. | what causes covalent bonds |
A. Due to complete transfer of electrons | |
B. due to partial transfer of electrons | |
C. due to electron sharing | |
D. due to electron donation |
| 20. | When two atoms of the same element combine, then the bond between them will be |
A. ionic | |
B. Coordinating | |
C. polar covalent | |
D. nonpolar covalent |