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High School: 9th and 10th Grade
Chemistry
Chemistry - Covalent Bonding
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Q.1
Chlorine has seven electrons in its outer energy level (shell). Six of these are arranged in pairs with one on its own. How many covalent bonds can it form?
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One
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Two
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Three
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Seven
Q.2
Which of the following could have covalent bonding?
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An alloy
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Atoms of a metal
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Atoms of a non-metal
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Molecules of a non-metal
Q.3
What is a single covalent bond?
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One pair of shared electrons
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Two pairs of shared electrons
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One electron shared between two atoms
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Four electrons shared between two atoms
Q.4
How is a single covalent bond conveniently represented?
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Two dots side by side
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A short horizontal line between the symbols of the elements involved
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A dot followed by a dash followed by a dot
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A semi colon
Q.5
Which of the following would have covalent bonding?
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A compound made from metals
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A compound made from non-metals
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An element made from metals
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None of the above
Q.6
Which of the following represents a molecule of carbon dioxide?
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O=O=C
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C=O=O
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O=C=O
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C=O=C
Q.7
Which of the following word equations correctly represents a reaction in which covalent bonding occurs?
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Hydrogen + oxygen → water
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Carbon + dioxide → carbon dioxide
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Sulfuric acid + zinc → hydrogen + zinc sulfate
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Chlorine + chlorine → dichlorine
Q.8
Is salt covalently bonded?
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Yes, because it is made from crystals
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Yes, because it dissolves in water
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No, because it is made from a metal joined to a non-metal
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No, because it can be obtained from the ground
Q.9
Which of the following is true about the compound carbon disulfide?
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It is made from molecules
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It is ionically bonded
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It is covalently bonded
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There are twice as many sulfur atoms as carbon atoms
Q.10
Why is the bonding in chlorine gas covalent?
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Chlorine gas is made from molecules
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Chlorine is an element
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Chlorine is a halogen
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Chlorine is a non-metal
0 h : 0 m : 1 s
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