1) How many covalent bonds are there in a molecule of ethane, C2H6? a) 7 b) 8 c) 6 d) 4 e) 9 2) Write the general molecular formula of alkane series. a) CnH2n+2 b) CnH2n-1 c) CnH2n+1 d) NONE 3) Write the molecular formula of an alkyne containing 10 atoms of hydrogen. a) C6H10 b) C3H6 c) C3H9 d) C2H8 4) Write the structural formula of a saturated hydrocarbon whose molecule contains three atoms of carbon. a) C3H8 b) C4H6 c) C2H5 d) C3H9

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