Understanding Alkanes

What is the general formula for alkanes?

• CnH2n

• C(n-1)H(2n-2)

• C2nH2n

• CnH(2n+2)

How many carbon atoms are in butane?

• 4

• 6

• 8

• 2

What type of bonding occurs in alkanes?

• Ionic bonding

• Metallic bonding

• Covalent bonding

• Hydrogen bonding

Name the first three alkanes in order.

• butane, pentane, hexane

• methanol, ethanol, propanol

• ethene, propene, butene

• methane, ethane, propane

What is the main characteristic of alkanes?

• Alkanes are unsaturated hydrocarbons with multiple bonds.

• Alkanes are aromatic compounds with a cyclic structure.

• Alkanes are saturated hydrocarbons with only single bonds.

• Alkanes contain double bonds between carbon atoms.

How do alkanes react with halogens?

• Alkanes react with halogens through ionic bonding.

• Alkanes do not react with halogens at all.

• Alkanes react with halogens by forming double bonds.

• Alkanes react with halogens via free radical substitution.

What is the state of most alkanes at room temperature?

• Most alkanes are only liquids at high temperatures.

• Most alkanes are gases or liquids at room temperature.

• All alkanes are gases at room temperature.

• Most alkanes are solids at room temperature.

What is the significance of the term 'saturated' in relation to alkanes?

• The term 'saturated' indicates the presence of double bonds in alkanes.

• The term 'saturated' refers to alkanes being soluble in water.

• Saturated alkanes have fewer hydrogen atoms than unsaturated ones.

• The term 'saturated' signifies that alkanes contain only single bonds and the maximum number of hydrogen atoms.

How does the boiling point of alkanes change with increasing carbon chain length?

• The boiling point of alkanes fluctuates randomly with carbon chain length.

• The boiling point of alkanes remains constant regardless of carbon chain length.

• The boiling point of alkanes decreases with increasing carbon chain length.

• The boiling point of alkanes increases with increasing carbon chain length.

What is the simplest alkane and its molecular formula?

• Ethane (C2H6)

• Propane (C3H8)

• Butane (C4H10)

• Methane (CH4)