1 Which of the following is an exception in covalent compounds regarding electrical conductivity? A Water B Graphite C Methane D Carbon dioxide
2 Which property of metals allows them to be drawn into wires? A Conductivity B Malleability C Ductility D Brittleness
3 Which type of bond is formed by the complete transfer of electrons from a metal to a non-metal? A Covalent bond B Coordinate covalent bond C Ionic bond D Metallic bond
4 Which of the following is a property of metals? A Poor conductors of heat B Brittle and hard C Good conductors of electricity D Low melting points
5 The sea of delocalised electrons is a characteristic of: A Ionic compounds B Covalent compounds C Metallic bonds D Coordinate covalent bonds
6 Which type of bond is formed by sharing of electron pairs between atoms? A Ionic bond B Covalent bond C Metallic bond D Coordinate covalent bond
7 Which type of bond is formed by the transfer of electrons from a metal to a non-metal? A Covalent bond B Coordinate covalent bond C Ionic bond D Metallic bond
8 Which of the following correctly describes the trend in electropositive character of metals? A It decreases down a group and increases across a period B It increases down a group and decreases across a period C It remains constant across a period D It increases across a period and decreases down a group
9 Which type of intermolecular force is the weakest? A London dispersion forces B Dipole-dipole forces C Hydrogen bonding D Ionic bonding
10 Ionic compounds conduct electricity when molten or dissolved because: A Their ions are free to move B Their molecules are free to move C They have delocalised electrons D They have weak intermolecular forces
12 Which type of solid is diamond? A Ionic solid B Simple molecular solid C Giant covalent solid D Metallic solid
13 Which of the following substances is likely to have a giant covalent structure? A Sodium chloride B Diamond C Water D Carbon dioxide
14 The electrons present in the outermost shell of an atom are called: A Core electrons B Valence electrons C Free electrons D Paired electrons
15 Which of the following is a giant covalent structure? A Sodium chloride B Diamond C Water D Carbon dioxide
16 Trend of electropositivity in a group of metals (top to bottom) generally: A Increases B Decreases C Remains same D First decreases then increases
17 In a coordinate covalent bond, the shared electron pair is donated by: A Both atoms equally B One atom only C The nucleus D A third atom
18 The strength of metallic bond depends on: A Number of delocalised electrons and size of metal ions B Number of protons in the nucleus C Number of neutrons in the nucleus D Presence of hydrogen bonds
19 Which of the following elements has the highest electronegativity? A Sodium B Chlorine C Fluorine D Oxygen
20 Ionic compounds conduct electricity when: A Solid B Molten or dissolved in water C Crystalline D Mixed with sugar
21 As we move from left to right across a period, the electropositive character of elements: A Increases B Decreases C Remains the same D First increases then decreases
22 Which of the following best explains why atoms form chemical bonds? A To increase their atomic number B To achieve a stable noble gas electron configuration C To decrease their mass number D To change their number of protons
23 Which bond is present in a molecule of chlorine (Cl2)? A Single covalent bond B Double covalent bond C Triple covalent bond D Ionic bond
24 Which of the following is a property of ionic compounds? A They are malleable B They conduct electricity when molten C They have low boiling points D They exist as simple molecules
25 Ionic bonds are formed by: A Sharing of electrons B Transfer of electrons C Overlap of orbitals D Delocalization of electrons