JEE Mains · Chemistry · STD 12 - 3. Chemical kinetics
Sucrose hydrolyses in acidic medium into glucose and fructose by first order rate law with \(t_{1/2} = 3\) hour. The percentage of sucrose remaining after \(6\) hours is _______. (Nearest integer) (Given: \(\log 2 = 0.3010\) and \(\log 3 = 0.4771\))
- A 10
- B 15
- C 20
- D 25
Answer & Solution
Correct Answer
(D) 25
Step-by-step Solution
Detailed explanation
For a first order reaction, the amount of reactant remaining after \(n\) half-lives is given by \(N_t = \dfrac{N_0}{2^n}\). Given \(t_{1/2} = 3\) hours and total time \(t = 6\) hours. Number of half-lives, \(n = \dfrac{t}{t_{1/2}} = \dfrac{6}{3} = 2\). The amount of sucrose…
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
- The major product of the following reaction is \(\begin{array}{*{20}{c}}
{C{H_3}}\\
{|\,\,\,\,\,}\\
{{C_6}{H_5}C{H_2} - C - C{H_2} - C{H_3}}\\
{|\,\,\,\,\,}\\
{Br\,\,\,}
\end{array}\) \(\xrightarrow[{{C_2}{H_5}OH}]{{{C_2}{H_5}ONa}}\)JEE Mains 2017 Hard - Given below are two statements:
Statement I: The correct order of electronegativity of fluorine, oxygen and nitrogen is \(F > O > N\).
Statement II: The oxidation state of oxygen in OF\(_2\) is \(+2\) and in Na\(_2\)O is \(-2\).
In the light of the above statements, choose the correct answer from the options given belowJEE Mains 2026 Easy - During water-gas shift reactionJEE Mains 2023 Medium
- Which of the following properties will change when system containing solution 1 will become solution 2?
JEE Mains 2025 Easy - When \(Fe _{0.93} O\) is heated in presence of oxygen, it converts to \(Fe _2 O _3\). The number of correct statement/s from the following is __________ .JEE Mains 2023 Medium
- The reagent needed for converting \(Ph - C \equiv C - Ph \to \)
JEE Mains 2014 Hard
More PYQs from JEE Mains
- Bond distance in \(HF\) is \(9.17\times10^{-11}\, m\). Dipole moment of \(HF\) is \(6.104\times10^{- 30}\, Cm\). The percentage ionic character in \(HF\) will be : .............. \(\%\) ( electron charge \(= 1.60\times10^{-19}\, C\))JEE Mains 2013 Hard
- If \(A=\begin{bmatrix}2&3\\ 3&5\end{bmatrix}\), then the determinant of the matrix \((A^{2025}-3A^{2024}+A^{2023})\) isJEE Mains 2026 Medium
- A pendulum is suspended by a string of length \(250\,cm\). The mass of the bob of the pendulum is \(200\,g\). The bob is pulled aside until the string is at \(60^{\circ}\) with vertical as shown in the figure. After releasing the bob. the maximum velocity attained by the bob will be________ \(ms ^{-1}\). (if \(g=10\,m / s ^{2}\) )
JEE Mains 2022 Medium - Oxidation of toluene to Benzaldehyde can be easily carried out with which of the following reagents?JEE Mains 2022 Easy
- Given below are two statements :
Statement I : '\( C-Cl \)' bond is stronger in \( CH_{2}=CH-Cl \) than \( CH_{3}-CH_{2}-Cl \)
Statement II : The given optically active molecule
on hydrolysis gives a solution that can rotate the plane polarized light.
In the light of the above statements, choose the correct answer from the options given belowJEE Mains 2026 Medium - A closed organ pipe of length \(L\) and an open organ pipe contain gases of densities \(\rho_{1}\) and \(\rho_{2}\) respectively. The compressibility of gases are equal in both the pipes. Both the pipes are vibrating in their first overtone with same frequency. The length of the open pipe is \(\frac{ x }{3} L \sqrt{\frac{\rho_{1}}{\rho_{2}}}\) where \(x\) is ......... . (Round off to the Nearest Integer)JEE Mains 2021 Easy