Consider the reaction below.

C2H4 (g) + H2 (g) - -> C2H6 (g)

Which change would likely cause the greatest increase in the rate of the reaction?

A) Decrease temperature and decrease pressure

B) Increase temperature and decrease pressure

C) Decrease temperature and increase pressure

D) Increase temperature and increase pressure

Answer : The correct option is, (D) Increase temperature and increase pressure.

Explanation:

Rate of reaction : Rate of reaction is the speed in which the reactants converted into the products.

As we know that the rate of reaction depends on many factors which are concentration of reactants, temperature, pressure, catalyst and the surface area.

As the temperature increases, the rate of reaction is also increases and vice-versa.

As we know that the the temperature is directly proportional to the pressure that means as the temperature increases, the pressure will also increases and the rate of reaction increases and vice-versa.

Hence, the correct option is, (D) Increase temperature and increase pressure.

D increase in temperature and increase in pressure.