$CATEGORY: Science - Khan Academy/4.Carbon and its Compounds/4.Carbon and its Compounds--Bonding in Carbon-The covalent Bond

//Multiple Choice

How many electrons are shared in a double covalent bond? {
    ~2
    =4
    ~6
    ~8
}

Which of the following molecules has a double covalent bond? {
    ~H₂O
    =CO₂
    ~N₂
    ~CH₄
}

How many electrons are shared in a triple covalent bond? {
    ~2
    ~4
    =6
    ~8
}

Which molecule contains a triple covalent bond? {
    ~H₂O
    ~CO₂
    =N₂
    ~CH₄
}

In the Lewis structure of CO₂, each carbon-oxygen bond is a ______ covalent bond. {
    ~Single
    =Double
    ~Triple
    ~Quadruple
}

How many covalent bonds are formed in the nitrogen molecule (N₂)? {
    ~1
    ~2
    =3
    ~4
}

In the molecule of oxygen (O₂), each oxygen atom forms a ______ covalent bond. {
    ~Single
    =Double
    ~Triple
    ~Quadruple
}

What is the total number of electrons shared in the triple covalent bond between two nitrogen atoms in N₂? {
    ~2
    ~4
    =6
    ~8
}

In the molecule of CO₂, the carbon atom forms ______ double bonds with oxygen atoms. {
    ~1
    =2
    ~3
    ~4
}

Which of the following molecules contains both single and double covalent bonds? {
    ~CH₄
    ~CO₂
    ~H₂O
    =H₂CO
}

//True or False

A double covalent bond involves the sharing of four electrons. {T}

In the Lewis structure of O₂, each oxygen atom shares two pairs of electrons. {T}

A triple covalent bond is stronger than a double covalent bond. {T}

In CO₂, the carbon atom forms one double bond and two single bonds with oxygen atoms. {F}

The nitrogen molecule (N₂) contains a triple covalent bond. {T}

In the molecule ethene (C₂H₄), the two carbon atoms are connected by a triple bond. {F}

A double covalent bond is formed by the sharing of two electron pairs. {T}

In the Lewis structure of carbon monoxide (CO), the carbon and oxygen atoms share three pairs of electrons. {T}

The bond angle in a molecule of CO₂ is 120°. {F}

In the molecule O₂, there are two lone pairs of electrons on each oxygen atom. {T}

//Fill in the blanks

In a double covalent bond, ______ electrons are shared between two atoms. {
    ~2
    =4
    ~6
    ~8
}

In the molecule of oxygen (O₂), each oxygen atom forms a ______ covalent bond. {
    ~Single
    =Double
    ~Triple
    ~Quadruple
}

The total number of electrons shared in a triple covalent bond is ______. {
    ~2
    ~4
    =6
    ~8
}

In the Lewis structure of CO₂, each carbon-oxygen bond is a ______ covalent bond. {
    ~Single
    =Double
    ~Triple
    ~Quadruple
}

The nitrogen molecule (N₂) has ______ covalent bonds between the two nitrogen atoms. {
    ~1
    ~2
    =3
    ~4
}

In the molecule CO₂, the carbon atom forms ______ double bonds. {
    ~1
    =2
    ~3
    ~4
}

The Lewis structure of a molecule with a triple covalent bond, such as N₂, shows ______ shared electron pairs. {
    ~1
    ~2
    =3
    ~4
}

In the molecule ethene (C₂H₄), the two carbon atoms are connected by a ______ bond. {
    ~Single
    =Double
    ~Triple
    ~Quadruple
}

The total number of valence electrons used in the Lewis structure of CO₂ is ______. {
    ~8
    ~12
    =16
    ~20
}

In the molecule of carbon monoxide (CO), the carbon and oxygen atoms are connected by a ______ covalent bond. {
    ~Single
    ~Double
    =Triple
    ~Quadruple
}

//Numericals

How many electrons are shared in a double covalent bond? {
    ~2
    =4
    ~6
    ~8
}

How many electrons are shared in a triple covalent bond? {
    ~2
    ~4
    =6
    ~8
}

How many total valence electrons are involved in the Lewis structure of CO₂? {
    ~12
    =16
    ~20
    ~24
}

How many shared electron pairs are present in the Lewis structure of O₂? {
    ~1
    =2
    ~3
    ~4
}

In the molecule of nitrogen (N₂), how many electrons are shared between the two nitrogen atoms? {
    ~2
    ~4
    =6
    ~8
}

How many double bonds are present in a molecule of CO₂? {
    ~1
    =2
    ~3
    ~4
}

How many shared electron pairs are present in the Lewis structure of ethene (C₂H₄)? {
    ~2
    ~4
    =5
    ~6
}

How many total valence electrons are used in the Lewis structure of N₂? {
    ~10
    ~12
    =14
    ~16
}

How many electrons are shared between the carbon atoms in ethene (C₂H₄)? {
    ~2
    =4
    ~6
    ~8
}

In the molecule of CO (carbon monoxide), how many electrons are shared between carbon and oxygen? {
    ~2
    ~4
    =6
    ~8
}

//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Oxygen molecule (O2) -> Double covalent bond 
=Carbon Dioxide ( CO2) -> Linear structure 
=Nitrogen Molecule (N2) -> Triple covalent bond 
=Ethene ( C2H4) -> Contains one double bond 
}


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