$CATEGORY: Science - Khan Academy/1.Chemical Reactions and Equations/1.Chemical Reactions and Equations--Types of Chemical Reactions

//Multiple Choice

In a redox reaction, which two processes occur simultaneously? {
    =Reduction and oxidation
    ~Combustion and fusion
    ~Decomposition and neutralization
    ~None of these
}

What type of reaction is magnesium reacting with oxygen to form magnesium oxide? {
    ~Reduction
    =Oxidation
    ~Neutralization
    ~Precipitation
}

In the reaction of zinc oxide with carbon, which element undergoes reduction? {
    =Zinc
    ~Carbon
    ~Oxygen
    ~None
}

When hydrogen is added to a compound, the reaction is classified as\: {
    ~Oxidation
    =Reduction
    ~Precipitation
    ~Displacement
}

Which compound gets oxidized when methane reacts with oxygen? {
    =Methane
    ~Oxygen
    ~Water
    ~Carbon dioxide
}

What is formed when carbon monoxide reacts with hydrogen? {
    ~Carbon dioxide
    ~Water
    =A single compound
    ~Sodium oxide
}

In terms of electrons, oxidation involves\: {
    ~Gaining electrons
    ~Sharing electrons
    =Losing electrons
    ~Breaking electrons
}

What happens to zinc in a reaction where it loses oxygen? {
    ~Oxidation
    =Reduction
    ~Combustion
    ~Sublimation
}

What is the older definition of oxidation? {
    =Addition of oxygen
    ~Removal of nitrogen
    ~Addition of hydrogen
    ~Removal of electrons
}

Removal of hydrogen can be thought of as\: {
    =Addition of oxygen
    ~Removal of oxygen
    ~Addition of nitrogen
    ~Sublimation
}

What is the product when copper oxide reacts with hydrogen? {
    =Copper and water
    ~Carbon dioxide
    ~Zinc oxide
    ~Carbon monoxide
}

What type of oxide is formed when magnesium reacts with oxygen? {
    ~Magnesium sulfate
    ~Magnesium nitride
    =Magnesium oxide
    ~Magnesium chloride
}

//True or False

Reduction is the addition of hydrogen. {T}

In oxidation, electrons are gained by the element. {F}

Redox reactions involve either oxidation or reduction but not both. {F}

Magnesium oxide is formed when magnesium reacts with oxygen. {T}

Oxygen is removed in reduction reactions. {T}

Carbon monoxide undergoes oxidation when hydrogen is added to it. {F}

Methane undergoes reduction when it reacts with oxygen. {F}

Zinc oxide reacts with carbon, and carbon gets reduced. {F}

Oxygen is added in an oxidation reaction. {T}

Hydrogen removal is equivalent to oxidation. {T}

A compound losing hydrogen undergoes reduction. {F}

Copper oxide reacts with hydrogen and forms water. {T}

//Fill in the blanks

Oxidation is the ________ of oxygen. {
    =Addition
    ~Removal
    ~Conversion
    ~Absorption
}

Reduction involves the ________ of oxygen. {
    ~Addition
    =Removal
    ~Sharing
    ~Conversion
}

A reaction where oxygen is removed from zinc oxide is called a ________ reaction. {
    ~Oxidation
    =Redox
    ~Sublimation
    ~Neutralization
}

Methane reacts with oxygen and undergoes ________. {
    =Oxidation
    ~Reduction
    ~Neutralization
    ~Precipitation
}

In redox reactions, ________ is both gained and lost. {
    ~Oxygen
    ~Hydrogen
    =Electrons
    ~Nitrogen
}

________ reactions involve the addition of hydrogen. {
    ~Oxidation
    =Reduction
    ~Neutralization
    ~Displacement
}

Removal of ________ is equivalent to oxidation. {
    ~Oxygen
    =Hydrogen
    ~Sulfur
    ~Carbon
}

Magnesium reacts with oxygen to form ________. {
    ~Sodium oxide
    =Magnesium oxide
    ~Copper oxide
    ~Zinc oxide
}

________ is the new definition of oxidation in terms of electrons. {
    =Losing electrons
    ~Gaining electrons
    ~Sharing electrons
    ~Converting electrons
}

Carbon monoxide reacts with ________ to form a compound. {
    =Hydrogen
    ~Oxygen
    ~Sulfur
    ~Carbon dioxide
}

In the formation of sodium oxide, sodium atoms ________ electrons. {
    ~Gain
    =Lose
    ~Share
    ~Absorb
}

//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Oxidation -> Addition of oxygen
=Reduction -> Removal of oxygen
=Magnesium reacts with oxygen -> Magnesium oxide
=Loss of electrons -> Removal of hydrogen
=Redox reactions -> Both oxidation and reduction
}


Match the following items from Column A with their correct corresponding options from Column B\:
{
=Methane reacts with oxygen -> Methane undergoes oxidation
=Electrons are gained -> Reduction
=Electrons are lost -> Oxidation
=Carbon monoxide reacts with hydrogen -> Reduction
=Copper oxide reacts with hydrogen -> Water and copper are formed
}

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