Chapter-3: True/False

An iron nail rusts at a faster rate than phosphorus burns in the air.

• True

• False

The rate of reaction can be expressed in terms of change in mass, volume, or concentration of reactants or products per unit time.

• True

• False

The negative sign in the rate equation for a reactant indicates that the concentration of that reactant is increasing over time.

• True

• False

Concentration changes in a reaction are always measured in terms of volume.

• True

• False

In chemical reactions, the rate constant, is represented by the letter k.

• True

• False

Collision theory states that all collisions between reactant particles result in a reaction.

• True

• False

The activation energy is the minimum energy required for a successful collision to occur in a reaction.

• True

• False

An activated complex is a stable intermediate formed during a chemical reaction.

• True

• False

Increasing the concentration of reactants will generally increase the rate of reaction according to collision theory.

• True

• False

In an exothermic reaction, the energy of the products is higher than that of the reactants.

• True

• False