Chemical Reactions (Part 2) Question Preview (ID: 46209)


Chemical Reactions (Part 2). TEACHERS: click here for quick copy question ID numbers.

________________________ is the minimum amount of energy needed to start a chemical reaction.
a) Activation energy
b) Kinetic energy
c) Catalyst energy
d) Inhibitor energy

Which of the following could increase the rate of reaction in a chemical reaction?
a) Increase exposed surface area of the reactants
b) Increase temperature of the reactants - speeding up the particles
c) Increase concentration of particles by pressurizing the reactants
d) All of these could increase the rate of reaction

Chemical Reactions that RELEASE thermal energy are called ____________________.
a) exothermic reactions
b) ectothermic reactions
c) endothermic reactions
d) kinetic reactions

Chemical Reactions that ABSORB thermal energy are called ____________________.
a) exothermic reactions
b) ectothermic reactions
c) endothermic reactions
d) kinetic reactions

In physics and chemistry, the ______________________ states that the total energy of an isolated system remains constant; it is said to be conserved over time.
a) Law of Conservation of Mass
b) Law of Conservation of Energy
c) Law of Conservation of Volume
d) Law of Conservation of Density

When a chemical bond forms, __________________.
a) it releases energy to the surroundings
b) it absorbs energy from the surroundings
c) no energy is released or absorbed
d) energy is both released and absorbed

Chemical bonds contain a form of energy called ________________ energy.
a) kinetic
b) thermal
c) chemical
d) magnetic

When a chemical bond breaks, __________________.
a) it releases energy to the surroundings
b) it absorbs energy from the surroundings
c) no energy is released or absorbed
d) energy is both released and absorbed

I will be expected to identify what type of chemical reaction is occurring by looking at a chemical equation on this summative assessment.
a) TRUE - I should review this on R14
b) FALSE - I should watch cringe compilations on Youtube instead of reviewing this stuff
c) -
d) -

A combustion reaction usually releases energy as _________________________ energy.
a) thermal and magnetic
b) thermal and nuclear
c) thermal and light
d) thermal and electrical

Combustion reactions always include diatomic oxygen molecules as reactants.
a) TRUE
b) FALSE
c) -
d) -

Combustion reactions always include diatomic oxygen molecules as products.
a) TRUE
b) FALSE
c) -
d) -

Combustion reactions always include Carbon Dioxide and Water as products.
a) TRUE
b) FALSE
c) -
d) -

Combustion reactions always include Carbon Dioxide and Water as reactants.
a) TRUE
b) FALSE
c) -
d) -

Replacement reactions NEVER involve metal elements.
a) TRUE
b) FALSE
c) -
d) -

Replacement reactions involve a rearrangement of nonmetal elements in Covalent Compounds.
a) TRUE
b) FALSE
c) -
d) -

Replacement reactions involve a rearrangement of metal and nonmetal elements in Ionic Compounds.
a) TRUE
b) FALSE
c) -
d) -

In a _________________ reaction, one element replaces another element in a compound.
a) double-replacement
b) single replacement
c) combustion
d) synthesis

A(n) _________________ is a substance that increases a reaction rate by lowering the activation energy necessary for a reaction to occur. Enzymes serve this function in the chemical reactions that take place in our digestive system.
a) inhibitor
b) catalyst
c) diatomic molecule
d) coefficient

A(n) ___________________ is a substance that slows, or even stops, a chemical reaction.
a) coefficient
b) inhibitor
c) catalyst
d) inference

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