__________ acts as a catalyst in the oxidation of sulphur dioxide.

The carbon cycle contributes to the important __________ process.

Most __________ catalysts are solids that catalyze either gaseous or liquid reactants.

Burning of magnesium ribbon takes within a/an __________.

Rate is expressed as a __________ quantity.

The unit of the rate at which concentration of hydrogen chloride is changed in their respective reaction is __________.

When ammonium chloride is dissolved in water, the flask becomes quite __________ to the touch.

The heat __________ in a process at standard conditions of temperature and pressure is called standard enthalpy change.

Depending on the gain or loss of energy chemical reaction can be classified as __________.

The neutralization reaction is exothermic and __________ is negative.