Chemical Reactions (Part 1) Question Preview (ID: 46204)
Chemical Reactions (Part 1).
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In a ________________________ reaction, one compound breaks down and forms two or more substances.
a) synthesis
b) combustion
c) replacement
d) decomposition
A ________________ reaction is a type of chemical reaction in which two or more substances combine to from one compound.
a) synthesis
b) decomposition
c) combustion
d) double-replacement
I will be expected to know how to balance a chemical equation for this Summative Assessment.
a) TRUE - I should review this on R13 and it's Supplement
b) FALSE - I should troll people on facebook instead of reviewing this stuff
c) -
d) -
When hydrogen peroxide interacts with sunlight it undergoes a chemical change, which yields Water and Oxygen. What kind of chemical reaction does this represent?
a) Decomposition
b) Synthesis
c) Combustion
d) Single-Replacement
Which of the following represents the correct sequence of actions to follow when balancing a chemical equation?
a) Add Coefficients -- Write the Balanced Chemical Equation -- Write the Unbalanced Chemical Equation -- Count Atoms
b) Write the Balanced Chemical Equation -- Write the Unbalanced Chemical Equation -- Count Atoms -- Add Coefficients
c) Write the Unbalanced Chemical Equation -- Count Atoms -- Add Coefficients -- Write the Balanced Chemical Equation
d) Write the Unbalanced Chemical Equation -- Add Coefficients -- Count Atoms -- Write the Balanced Chemical Equation
The ______________________________ states that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction.
a) Law of Conservation of Energy
b) Law of Conservation of Mass
c) Law of Mass Equilibrium
d) Law of Molecular Stability
Which of the following represents the appropriate structure for a chemical equation? ***Yields*** symbolizes a right pointing arrow
a) reactant + reactant ---yields--- product + product
b) reactant + product ---yields--- reactant + product
c) product + product ---yields--- reactant + reactant
d) None of These
The starting substances in a chemical reaction are referred to as _______________.
a) components
b) ingredients
c) reactants
d) products
The substances produced by the chemical reaction are referred to as ____________.
a) summative substances
b) products
c) reactants
d) diatoms
Some elements exist in nature as _____________________ -two atoms bonded together. These will be found with a subscript of 2.
a) Biatomic Molecules
b) Binary Compounds
c) Diatomic Molecules
d) None of These
A _____________________ is a description of a reaction using element symbols and chemical formulas.
a) chemical formula
b) chemical equation
c) mandelbrot set
d) chemical equilibrium
In which of the following circumstances, can you infer that a chemical reaction has occurred?
a) A nail rusts when it is left out in the rain for two days.
b) A firefly gives off light when it flies in the backyard.
c) Neither of These
d) Both of These
In which of the following circumstances, can you infer that a chemical reaction has occurred?
a) A piece of wood is carved into the shape of a baseball bat.
b) Meat begins to smell after it sits in the hot sun for a few hours.
c) Neither of These
d) Both of These
Which of the following would be an example of a chemical change?
a) Fireworks
b) an Ice Cube Melting
c) Crushing a Tin can
d) Chopping Wood
In which of the following circumstances, can you infer that a chemical reaction has occurred?
a) Bright copper turns green when it is placed in air.
b) Water changes to ice when it is placed in the freezer.
c) Neither of These
d) Both of These
Which of the following would be an example of a physical change?
a) Iron Rusting
b) An Egg Frying
c) Water evaporating
d) Wood Burning
A chemical reaction is a process in which atoms of one or more substances ________________ to form one or more new substances.
a) disappear
b) implode
c) rearrange
d) duplicate
During a _____________________, one or more substances or reactants CHANGE into new substances or products.
a) physical change
b) chemical change
c) condensation event
d) sublimation event
A ________________ DOES NOT produce new substances or products.
a) chemical change
b) exothermic chemical reaction
c) endothermic chemical reaction
d) physical change
Magnesium reacts with Oxygen in the air and forms Magnesium Oxide. The previous sentence describes what kind of reaction?
a) combustion
b) synthesis
c) decomposition
d) single-replacement
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