Engineering Physics

Multiple Choice Questions

1. Basically, interatomic forces are:     ( )
   1. electrostatic in nature
   2. gravitational forces
   3. magnetic forces
   4. short-range forces
2. Primary bonds are _____ in nature     ( )
   1. intermolecular
   2. interatomic
   3. Vanderwaals forces
   4. none
3. Primary bonds are:     ( )
   1. ionic bonds
   2. covalent bonds
   3. metallic bonds
   4. all
4. Bonding or cohesive energy is defined as:     ( )
   1. the amount of energy required to separate atoms to an infinite distance
   2. the amount of energy evolved when a bond is formed
   3. a and b
   4. none
5. Examples for ionic crystals are:     ( )
   1. NaCl and KBr
   2. MgO and KI
   3. K₂O and LiH
   4. all
6. Ionic crystals     ( )
   1. are rigid and possess high melting and boiling points
   2. in solution conduct electricity
   3. are easily soluble in polar solvents like water ...