Question

For the reaction $aA$$+$$bB$$=$$cC$$+$$dD$, the forward and the backward reaction rate according to law of mass action are given by :

• A. Rate= $K_f$$[A{]}^a$$[B{]}^b$, $K_f$ is forward rate constant
• B. Rate= $K_b$$[C{]}^c$$[D{]}^d$, $K_b$ is backward rate constant
• C. Rate= $K_f$$\left[A\right]$$\left[B\right]$, $K_f$ is forward rate constant
• D. Rate= $K_b$$\left[C\right]$$\left[D\right]$, $K_b$ is backward rate constant

Answer 1

Answer: (A), (B)

The correct options are
A Rate= $K_f$$[A{]}^a$$[B{]}^b$, $K_f$ is forward rate constant
B Rate= $K_b$$[C{]}^c$$[D{]}^d$, $K_b$ is backward rate constant

For the reaction $aA$$+$$bB$$=$$cC$$+$$dD$, the forward reaction rate is given by-
Rate= $K_f$$[A{]}^a$$[B{]}^b$, where $K_f$ is forward rate constant. Rate depends on the stoichiometric co-efficient of the reaction.
And the backward reaction rate is given as Rate= $K_b$$[C{]}^c$$[D{]}^d$, where $K_b$ is backward rate constant