JEE Advanced · Chemistry · 18. Chemical Kinetics
Consider a reaction \(a G+b H \rightarrow\) products. When concentration of both the reactants \(G\) and \(H\) is doubled, the rate increases by eight times. However, when concentration of \(G\) is doubled keeping the concentration of \(H\) fixed, the rate is doubled. The overall order of the reaction is
- A 0
- B 1
- C 2
- D 3
Answer & Solution
Correct Answer
(D) 3
Step-by-step Solution
Detailed explanation
\(a G+b H \longrightarrow\) Product
Suppose order of reaction \(=n\)
When concentration of both \(G\) and \(H\) is double than rate increase by eight times.
\(\text {rate} =k(\text { reactants })^n \)
\( (2)^8 =k(2)^n \)
\( (2)^3 =k(2)^n \)
\( n =3\)
when concentration of \(G\) is doubled than concentration \(H\) is fixed, the rate is double.
than \(\quad\) rate \(\propto[G]^1[H]^2\)
Suppose order of reaction \(=n\)
When concentration of both \(G\) and \(H\) is double than rate increase by eight times.
\(\text {rate} =k(\text { reactants })^n \)
\( (2)^8 =k(2)^n \)
\( (2)^3 =k(2)^n \)
\( n =3\)
when concentration of \(G\) is doubled than concentration \(H\) is fixed, the rate is double.
than \(\quad\) rate \(\propto[G]^1[H]^2\)
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