9th Class General Science Chapter 5 Test05. Chemical Bonding

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. The reason of bonding in ionic compounds is..........
   1. Sharing of electrons
   2. Repulsion force
   3. Attraction force
   4. None of these
2. A polar covalent bond will be formed in which one of these pair of atoms:
   1. HF
   2. H₂
   3. Cl₂
   4. O₂
3. Ionic compounds have_____ melting points due to _____ ionic compounds
   1. High,weak
   2. High,strong
   3. Low,strong
   4. Low,weak
4. A molecule of ........... contains a triple bond
   1. Sulphur
   2. Nitrogen
   3. Carbon
   4. Oxygen
5. The region around the nucleus which can be filled with one or two electrons is
   1. Field
   2. Axis
   3. Zone
   4. Atomic orbital
6. In covalent compound, the bond is formed due to the..........
   1. Sharing of electrons
   2. Donation of electrons
   3. High electronegativity of atoms
   4. High electron affinity of atoms
7. Aluminium tends to lose:
   1. 2 electron
   2. 4 electron
   3. 1 electron
   4. 3 electron
8. Identify the molecule with a single covalent bond
   1. CO₂
   2. CO
   3. Cl₂
   4. N₂
9. The electronic configuration of atom which possess lowest energy is the most
   1. Stable
   2. Unstable
   3. Transitional
   4. Ductile
10. A gas having double bond is:
    1. Carbon monoxide
    2. Oxygen
    3. Carbon dioxide
    4. None of these