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