PRE-TEST (Q3M5)-CHEMICAL REACTION RATE

Which of the following is a sign of a chemical change? The sign of a chemical change is a change in _______.

• COMPOSITION

• MASS

• SHAPE

• VOLUME

What is the minimum amount of energy needed to start a chemical reaction?

• HEAT

• SOUND

• BIOMASS

• ACTIVATION ENERGY

What is referred to as substances that take part in a chemical reaction?

• INGREDIENTS

• MATERIALS

• PRODUCTS

• REACTANTS

What is the substance used to speed up a chemical reaction?

• ACTIVATOR

• CATALYST

• INHIBITOR

• INITIATOR

Which states that chemical reactions will occur when reacting molecules are in the proper orientation and have enough energy for the reaction?

• COLLISION THEORY

• DALTON`S ATOMIC THEORY

• LAW OF DEFINITE PROPORTION

• LAW OF CONSERVATION

Which of the following will NOT increase reaction rate?

• PRESENCE OF CATALYST

• PRESENCE OF INHIBITOR

• INCREASED TEMPERATURE

• INCREASED CONCENTRATION

What does NOT happen when you increase the temperature of a reacting system? When you increase the temperature of a reacting system, the particles will _________.

• MOVE FASTER

• COLLIDE MORE OFTEN

• COLLIDE WITH MORE ENERGY

• COLLIDE IN THE CORRECT ORIENTATION

In which illustration would there be a chemical reaction?

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Which of the following processes is a NOT a chemical change?

• DIGESTION OF FOOD

• DISTILLATION OF WATER

• GAS GENERATED FROM MANURE

• FERMENTATION OF COCO WATER TO VINEGAR

Which of the following situations shows a chemical change?

• ALUMINUM ROLLED INTO SHEETS

• GASOLINE EVAPORATES WHEN LEFT IN AN OPEN CONTAINER

• COLORED CLOTHES FADE WHEN BLEACHED UNDER THE SUN

• BUBBLLES CAME OUT OF AN EGGSHELL ACCIDENTALLY SPILLED WITH VINEGAR