KCET · Chemistry · Chemical Kinetics
\( 1 \mathrm{~L} \) of \( 2 \mathrm{M} \mathrm{CH}_{3} \mathrm{COOH} \) is mixed with \( 1 \mathrm{~L} \) of \( 3 \mathrm{M} \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH} \) to form an ester. The rate of the
reaction with respect to the initial rate when each solution is diluted with an equal volume of
water will be
- A \( 0.5 \) times
- B \( 4 \) times
- C \( 0.25 \) times
- D \( 2 \) times
Answer & Solution
Correct Answer
(C) \( 0.25 \) times
Step-by-step Solution
Detailed explanation
(C)
Esterification is a second order reaction
\(\mathrm{CH}_{3} \mathrm{COOH}+\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH} \rightarrow \mathrm{CH}_{3} \mathrm{COOC}_{2} \mathrm{H} 5+\mathrm{H}_{2} \mathrm{O}\)
\(\mathrm{r}=\mathrm{k}\left[\mathrm{CH}_{3} \mathrm{COOH}\right]\left[\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\right]\)
Order \(=2\)
When equal volume of two solutions are mixed, concentration of the solutions reduces to half the initial value. Hence,
rate of reaction gets reduced to \(\frac{1}{4}\) initial rate.
Esterification is a second order reaction
\(\mathrm{CH}_{3} \mathrm{COOH}+\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH} \rightarrow \mathrm{CH}_{3} \mathrm{COOC}_{2} \mathrm{H} 5+\mathrm{H}_{2} \mathrm{O}\)
\(\mathrm{r}=\mathrm{k}\left[\mathrm{CH}_{3} \mathrm{COOH}\right]\left[\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\right]\)
Order \(=2\)
When equal volume of two solutions are mixed, concentration of the solutions reduces to half the initial value. Hence,
rate of reaction gets reduced to \(\frac{1}{4}\) initial rate.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- Which of the following is the correct electron dot structure of \( \mathrm{N}_{2} \mathrm{O} \) molecule ?KCET 2017 Easy
- Among the elements from atomic number \( 1 \) to \( 36 \),the number of elements which have an
unpaired electron in their s-subshell isKCET 2014 Medium - The metal extracted by leaching with a cyanide isKCET 2017 Medium
- Which complex cannot ionise in solution?KCET 2007 Easy
- The vapour pressure of pure liquids \(A\) and \(B\) are 450 and \(700 \mathrm{~mm}\) of \(\mathrm{Hg}\) at \(350 \mathrm{~K}\) respectively. If the total vapour pressure of the mixture is \(600 \mathrm{~mm}\) of \(\mathrm{Hg}\), the composition of the mixture in the solution isKCET 2021 Easy
- Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphiteKCET 2007 Hard
More PYQs from KCET
- An electric heater rated \(220 \mathrm{~V}\) and \(550 \mathrm{~W}\) is connected to AC mains. The current drawn by it isKCET 2009 Easy
- The value of
\({ }^{49} C_3+{ }^{48} C_3+{ }^{47} C_3+{ }^{46} C_3+{ }^{45} C_3+{ }^{45} C_4\) isKCET 2024 Easy - The distance of the point \(\mathrm{P}(-3,4,5)\) from yz plane isKCET 2025 Easy
- What will be the total electric flux through the faces of the cube as given in the figure with side of length '\(a\)' if a charge Q is placed at B midpoint of an edge of the cube (see figure)?
KCET 2026 Medium - \(7^{2 \log _{7} 5}\) is equal toKCET 2007 Easy
- If \(f(x)=\left\{\begin{array}{cl}x^2-1, & 0 < x < 2 \\ 2 x+3, & 2 \leq x < 3\end{array}\right.\),the quadratic equation whose roots are \(\lim _{x \rightarrow 2^{-}} f(x)\) and \(\lim _{x \rightarrow 2^{+}} f(x)\) isKCET 2022 Easy