Rates of reaction and collision theory

Question 1 of 10

30 cm³ of gas was collected in 40 s. Find the average rate of reaction.

Question 2 of 10

Increasing the temperature increases the rate mainly because

Question 3 of 10

Increasing the pressure of a gaseous reaction increases the rate because

Question 4 of 10

The reaction rate decreases with time because

Question 5 of 10

Sketch the Maxwell–Boltzmann distribution of molecular energies for a gas at two temperatures, T₁ and T₂ (T₂ > T₁). Use it to explain the effect of temperature on rate.

Question 6 of 10

Increasing surface area increases the activation energy.

Question 7 of 10

A catalyst is chemically unchanged at the end of a reaction.

Question 8 of 10

A catalyst increases the rate of a reaction by

Question 9 of 10

If 45 cm³ of hydrogen is produced in 50 s, the average rate is ___ cm³/s.

Question 10 of 10

Powdered marble reacts faster with acid than marble chips because