MHT CET · Chemistry · Chemical Kinetics
Half life of a first order reaction is 1 hour. What fraction of it will remain after 3 hour?
- A \(\frac{1}{8}\)
- B \(\frac{1}{9}\)
- C \(\frac{1}{16}\)
- D \(\frac{1}{64}\)
Answer & Solution
Correct Answer
(A) \(\frac{1}{8}\)
Step-by-step Solution
Detailed explanation
\(\because \quad\) Half life \(\left(\mathrm{t}_{1 / 2}\right)=1\) hour
\(\therefore \quad\) Fraction available after 3 hours \(=3 \times \mathrm{t}_{1 / 2}=\frac{1}{8}\)
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 from following complexes is an example of \(\mathrm{MA}_2 \mathrm{BC}\) type of distereoisomers?MHT CET 2025 Medium
- Identify the element from following having six unpaired electrons in observed electronic configuration?MHT CET 2023 Easy
- Equal masses in grams of \(\mathrm{H}_2, \mathrm{~N}_2, \mathrm{Cl}_2\), and \(\mathrm{O}_2\), are enclosed in cylinders separately. If these gases expand isothermally and reversibly by \(10 \mathrm{dm}^3\) at \(300 \mathrm{~K}\), the work done by gas is maximum forMHT CET 2023 Medium
- Which free radical initiator is used for polymerization of tetrafluoro ethylene?MHT CET 2021 Easy
- What is the shape and magnetic nature of permanganate ion?MHT CET 2019 Medium
- Identify glycosidic linkage present in maltose.MHT CET 2023 Medium
More PYQs from MHT CET
- Which of the following is an acidic oxide?MHT CET 2025 Easy
- When a photosensitive surface is irradiated by lights of wavelengths ' \(\lambda_1\) ' and ' \(\lambda_2\) ', kinetic energies of the emitted photoelectrons is ' \(E_1\) ' and ' \(E_2\) ' respectively. The work function of the photosensitive surface isMHT CET 2024 Easy
- Which among the following is biodegradable polymer?MHT CET 2020 Easy
- \( \text { If } \begin{aligned} f(x) &=\frac{|x-2|}{x-2}, \text { for } x \neq 2 =1 \text { for } x=2, \end{aligned} \)
then which of the following statements is true?MHT CET 2020 Easy - The derivative of \(\mathrm{f}(\tan x)\) w.r.t. \(\mathrm{g}(\sec x)\) at \(x=\frac{\pi}{4}\) where \(\mathrm{f}^{\prime}(1)=2\) and \(\mathrm{g}^{\prime}(\sqrt{2})=4\) is
(A)
(B)MHT CET 2023 Medium - What is the change in oxidation number of \(\mathrm{Cr}\) in the following redox reaction?
MHT CET 2023 Medium