Half-life and 1st order reaction

Which of the following graphs represents first order reaction?

• 
• 
• 
• No answer

Name the variable on the y-axis.

• Time

• Temperature

• Concentration

• Energy

Name the variable on the x-axis.

• Temperature

• Rate

• Concentration

• Time

The half-lives for a first order reaction are the same. True or False?

• TRUE

• FALSE

Which one of the methods below is used to calculate the half-life?

• The initial rates method

• The graphical method

• The energy method

• The concentration method