7.3 Application of Factors that Affect the Rate of Reaction

The rate of a chemical reaction is NOT affected by which of the following

• volume of reactants

• concentration of reactants

• size of solid reactants

• temperature

Meat cooks faster if it is cut into ________________sizes.

• larger

• smaller

• bigger

• medium

In the refrigerator, the _________temperature decreases the growth of bacteria that causes food decay

• higher

• medium

• lower

• none of the above

Food cooks faster in a pressure cooker because of high________ .

• concentration

• size

• pressure

• temperature

Coal burns faster in small chips because of the large surface area that is _________

• large

• small

• medium

• exposed

Catalytic converters change pollutants into non-harmful products that are safe to be released into the atmosphere in the presence of _______ catalyst.

• Nikel

• Iron

• Platinum

• Copper

Exhaust gas from car engines contains pollutants. Choose the pollutants

• carbon monoxide

• nitrogen dioxide

• sulphur dioxide

• carbon dioxide

Washing clothes using detergent powder and hot water combines two factors that increase the rate of reaction.Choose the two factors.

• concentration

• size of reactant

• catalyst

• temperature

The compression of __________ and _________increases the concentration of the petrol vapour allowing the petrol to burn very quickly until it explodes. T

• Petrol vapour

• air

• diesel vapour

• water

When the concentration of the acidic pollutants__________, the level of acid rain ______ and the rate of corrosion _______

• increase,decrease,increase

• decrease,increase,increase

• increase,increase,increase

• increase,decrease,decrease