PHC121 lec 2

The intramolecular bond formed between non-metals is

• Ionic bond

• covalent bond

• Metallic bond

• Van der Waal forces

Aluminum coils are good conductors of electricity due to the ........ bond

• Covalent

• Hydrogen

• Metallic

• dipole-diople

...... is considered an extreme type of dipole-dipole bonding

• Coordinate bond

• Ionic bond

• Hydrogen bond

• Van der Waals

The following is true about exothermic reactions except for:

• Potential energy of reactants > products

• ∆H is -ve

• energy is absorbed

• reaction is spontaneous

Which of the following is true about "catalyst" :

• it is consumed by the reaction

• It does not affect the rate of chemical reaction

• It acts by lowering activation energy

• it only works in high temperatures