4. CARBON AND ITS COMPO-MCQ’S-1

How are the bonds in methane described? How are the bonds in methane described?

1 Mark(s)

sharing of protons sharing of protons
transfer of nuclei transfer of nuclei
metallic attraction metallic attraction
sharing of an electron pair sharing of an electron pair

How does carbon overcome the difficulty of gaining or losing four electrons? How does carbon overcome the difficulty of gaining or losing four electrons?

1 Mark(s)

sharing valence electrons sharing valence electrons
forming C4− ions forming C4− ions
transferring one electron transferring one electron
losing two electrons losing two electrons

A shared electron pair between atoms constitutes what type of bond? A shared electron pair between atoms constitutes what type of bond?

1 Mark(s)

metallic attraction metallic attraction
sharing of an electron pair sharing of an electron pair
electrostatic attraction between ions electrostatic attraction between ions
loss of neutrons loss of neutrons

What is the atomic number of carbon? What is the atomic number of carbon?

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6 6
4 4
8 8
12 12

The poor conductivity of carbon compounds is linked to what bonding feature? The poor conductivity of carbon compounds is linked to what bonding feature?

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they are all metals they are all metals
they have very high melting points they have very high melting points
they generally do not form ions they generally do not form ions
they contain mobile protons they contain mobile protons

Why do many covalent carbon compounds have low melting and boiling points? Why do many covalent carbon compounds have low melting and boiling points?

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weak intermolecular forces weak intermolecular forces
absence of covalent bonds absence of covalent bonds
free electrons free electrons
hydrogen nuclei hydrogen nuclei

Why does O2 contain a double bond? Why does O2 contain a double bond?

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two shared electron pairs two shared electron pairs
no electron pairs no electron pairs
one neutron pair one neutron pair
one shared pair one shared pair

What is the nature of the shared pair in H2? What is the nature of the shared pair in H2?

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two ionic bonds two ionic bonds
three transferred electrons three transferred electrons
two transferred electrons two transferred electrons
one shared electron pair one shared electron pair

Carbon commonly achieves a noble-gas configuration by what process? Carbon commonly achieves a noble-gas configuration by what process?

1 Mark(s)

forming metallic bonds forming metallic bonds
forming C4+ ions forming C4+ ions
sharing valence electrons sharing valence electrons
forming C4− ions forming C4− ions

How many shared electron pairs are present between the oxygen atoms in O2? How many shared electron pairs are present between the oxygen atoms in O2?

1 Mark(s)

three shared pairs three shared pairs
two shared electron pairs two shared electron pairs
four shared pairs four shared pairs
one transferred electron one transferred electron

Why are many carbon compounds low-melting compared with ionic compounds? Why are many carbon compounds low-melting compared with ionic compounds?

1 Mark(s)

free electrons free electrons
hydrogen nuclei hydrogen nuclei
very high lattice energy very high lattice energy
weak intermolecular forces weak intermolecular forces

Why do covalent carbon compounds generally fail to conduct electricity? Why do covalent carbon compounds generally fail to conduct electricity?

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they are always molten they are always molten
they contain free neutrons they contain free neutrons
they have metallic lattices they have metallic lattices
they generally do not form ions they generally do not form ions

What is a covalent bond according to the chapter? What is a covalent bond according to the chapter?

1 Mark(s)

sharing of an electron pair sharing of an electron pair
formation of ions only formation of ions only
sharing of protons sharing of protons
transfer of nuclei transfer of nuclei

Which statement about carbon's electron arrangement is correct? Which statement about carbon's electron arrangement is correct?

1 Mark(s)

16 16
10 10
6 6
4 4

How many shared electron pairs join the nitrogen atoms in N2? How many shared electron pairs join the nitrogen atoms in N2?

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four shared pairs four shared pairs
three shared electron pairs three shared electron pairs
one transferred electron one transferred electron
two transferred electrons two transferred electrons

Carbon's combining capacity is linked to how many valence electrons? Carbon's combining capacity is linked to how many valence electrons?

1 Mark(s)

8 8
12 12
17 17
6 6

What electrical property is common to most carbon compounds in the chapter? What electrical property is common to most carbon compounds in the chapter?

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they have metallic lattices they have metallic lattices
they generally do not form ions they generally do not form ions
they contain only charged atoms they contain only charged atoms
they contain many free ions they contain many free ions

Which bonding process is involved when two atoms share electrons? Which bonding process is involved when two atoms share electrons?

1 Mark(s)

complete electron transfer complete electron transfer
loss of all valence electrons loss of all valence electrons
sharing of an electron pair sharing of an electron pair
formation of ions only formation of ions only

What bond joins the two hydrogen atoms in H2? What bond joins the two hydrogen atoms in H2?

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one shared electron pair one shared electron pair
one ionic bond one ionic bond
two ionic bonds two ionic bonds
three transferred electrons three transferred electrons

Which description fits the bonding in H2? Which description fits the bonding in H2?

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four shared pairs four shared pairs
no shared electrons no shared electrons
one shared electron pair one shared electron pair
one ionic bond one ionic bond

How do two hydrogen atoms achieve stable shells in H2? How do two hydrogen atoms achieve stable shells in H2?

1 Mark(s)

two transferred electrons two transferred electrons
one shared electron pair one shared electron pair
three shared pairs three shared pairs
one transferred proton one transferred proton

Why are most carbon compounds poor conductors of electricity? Why are most carbon compounds poor conductors of electricity?

1 Mark(s)

they generally do not form ions they generally do not form ions
they contain mobile protons they contain mobile protons
they are always molten they are always molten
they contain free neutrons they contain free neutrons

What do the oxygen atoms share to complete their octets? What do the oxygen atoms share to complete their octets?

1 Mark(s)

one neutron pair one neutron pair
one shared pair one shared pair
three shared pairs three shared pairs
two shared electron pairs two shared electron pairs

How many electrons are present in the outermost shell of carbon? How many electrons are present in the outermost shell of carbon?

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17 17
6 6
2 2
14 14

Why does carbon form covalent compounds? Why does carbon form covalent compounds?

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transferring one electron transferring one electron
losing two electrons losing two electrons
gaining two electrons gaining two electrons
sharing valence electrons sharing valence electrons

Which bonding approach is characteristic of carbon in the chapter? Which bonding approach is characteristic of carbon in the chapter?

1 Mark(s)

gaining two electrons gaining two electrons
sharing valence electrons sharing valence electrons
forming only ionic bonds forming only ionic bonds
sharing no electrons sharing no electrons

What is the relationship between molecular bonding and the melting points of carbon compounds? What is the relationship between molecular bonding and the melting points of carbon compounds?

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very high lattice energy very high lattice energy
weak intermolecular forces weak intermolecular forces
strong ionic forces strong ionic forces
metallic bonding metallic bonding

What type of bond is present in N2? What type of bond is present in N2?

1 Mark(s)

three shared electron pairs three shared electron pairs
metallic bonding metallic bonding
one shared pair one shared pair
two shared pairs two shared pairs

Which bond is described for a molecule of oxygen? Which bond is described for a molecule of oxygen?

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two protons two protons
three transferred electrons three transferred electrons
two shared electron pairs two shared electron pairs
no electron pairs no electron pairs

Which force is described as weak in covalent carbon compounds? Which force is described as weak in covalent carbon compounds?

1 Mark(s)

nuclear forces nuclear forces
strong intermolecular forces only strong intermolecular forces only
weak intermolecular forces weak intermolecular forces
absence of covalent bonds absence of covalent bonds

4. CARBON AND ITS COMPO-MCQ’S-1 : Question 1 of 30