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Example Questions
Example Question #1 : Essential Properties Of Carbon
Carbon is __________.
Possible Answers:
divalent
monovalent
None of these answers
tetravalent
trivalent
Correct answer:
tetravalent
Explanation:
Since carbon has four valence electrons in its shell, it can form up to four bonds with different atoms to complete its valence shell with electrons.
Example Question #1 : Essential Properties Of Carbon
Which of the following is true about carbon?
Possible Answers:
Carbon is less electronegative than hydrogen
Under normal conditions, carbon is regularly observed to form a diatomic molecule
with a quadruple bondAll 6-member carbon rings are aromatic
The allotropes of carbon are liquid at room temperature
The oxidation state of carbon in carbon monoxide is +2
Correct answer:
The oxidation state of carbon in carbon monoxide is +2
Explanation:
The oxidation state of carbon in carbon monoxide is indeed
. This is because oxygen contributes a to the state, and the molecule's overall charge is neutral. Although diatomic carbon with a quadruple bond is theorized by some scientists possibly to exist, it is not regularly observed. The allotropes of carbon (such as graphite and diamond) are solids, not liquids, at room temperature. Hydrogen is less electronegative than carbon, and some 6-member carbon rings (such as cyclohexane) are not aromatic.
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