JEE Mains · Chemistry · STD 12 - 3. Chemical kinetics
The rate of a reaction \(A\) doubles on increasing the temperature from \(300\) to \(310\, K\). By how much, the temperature of reaction \(B\) should be increased from \(300\, K\) so that rate doubles if activation energy of the reaction \(B\) is twice to that of reaction \(A\). ......... \(K\)
- A \(9.84\)
- B \(4.92\)
- C \(2.45\)
- D \(19.67\)
Answer & Solution
Correct Answer
(B) \(4.92\)
Step-by-step Solution
Detailed explanation
In order to calculate the enthalpy change for \(H_2O\) at \(5\,^oC\) to ice at \(-\,5\,^oC\) , we need to calculated the enthalpy change of all the transformation involved in the process. \((a)\) Energy change of \(1\,mol\), \(H_2O\,(l)\), at \(5\,^oC\) \(\to \,1\,mol\),…
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
- Given below are two statements: One is labelled as Assertion \(A\) and the other is labelled as Reason \(R\): Assertion \(A\): Alcohols react both as nucleophiles and electrophiles. Reason \(R\): Alcohols react with active metals such as sodium, potassium and aluminum to yield corresponding alkoxides and liberate hydrogen. In the light of the above statements, choose the correct answer from the options given below:JEE Mains 2024 Hard
- The effect of lanthanoid contraction in the lanthanoid series of elements by the large meansJEE Mains 2019 Easy
- Consider the following sequence of reactions to give the major product \((X)\)

\(P\) g of the major product \((X)\) formed is reacted with \(NaHCO_3\) solution to liberate a gas which occupied \(11.2\) dm\(^3\) at STP. \(P = \) _____ g. (Given molar mass in g mol\(^{-1}\) H:\(1\), C:\(12\), O:\(16\), Cl:\(35.5\))JEE Mains 2026 Hard - The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance \(A\) and substance \(B\) from the base line are \(3.25\,cm .2 .08\) \(cm\) and \(1.05\,cm\). respectively. The ratio of \(R_{f}\) values of \(A\) to \(B\) is\(.........\)JEE Mains 2022 Medium
- Phenol on reaction with dilute nitric acid, gives two products. Which method will be most effective for large scale separation ?JEE Mains 2022 Medium
- A molecule undergoes two independent first order reactions whose respective half lives are \(12\,min\) and \(3\,min\). If both the reactions are occurring then the time taken for the \(50 \%\) consumption of the reactant is \(..........\,\min\) (Nearest integer)JEE Mains 2023 Medium
More PYQs from JEE Mains
- Let a smooth curve \(y=f(x)\) be such that the slope of the tangent at any point \((x, y)\) on it is directly proportional to \(\left(\frac{-y}{x}\right)\). If the curve passes through the point \((1,2)\) and \((8,1)\), then \(\left| y \left(\frac{1}{8}\right)\right|\) is equal toJEE Mains 2022 Hard
- A train moves towards a stationary observer with speed \(34\, m/s\). The train sounds a whistle and its frequency registered by the observer is \(f_1\). If the speed of the train is reduced to \(17\, m/s\), the frequency registered is \(f_2\). If speed of sound is \(340\, m/s\), then the ratio \(f_1/f_2\) isJEE Mains 2019 Hard
- A spherical surface of radius of curvature \(R\), separates air from glass (refractive index \(=1.5\) ). The centre of curvature is in the glass medium. A point object ' \(O\) ' placed in air on the optic axis of the surface, so that its real image is formed at ' \(I\) ' inside glass. The line OI intersects the spherical surface at P and \(\mathrm{PO}=\mathrm{PI}\). The distance PO equals to ________.JEE Mains 2025 Medium
- Let \(S=\{1,2,3,4,5,6\} .\) Then the probability that a randomly chosen onto function \(\mathrm{g}\) from \(\mathrm{S}\) to \(\mathrm{S}\) satisfies \(g(3)=2 g(1)\) is :JEE Mains 2021 Medium
- The values of \('a'\) for which one root of the equation \(x^2 - (a +1)\,x + a^2 + a - 8 = 0\) exceeds \(2\) and the other is lesser than \(2\), are given byJEE Mains 2013 Hard
- Let \(A=\left[\begin{array}{lll}2 & a & 0 \\ 1 & 3 & 1 \\ 0 & 5 & b\end{array}\right]\) If \(A^3=4 A^2-A-21 I\), where I is the identity matrix of order \(3 \times 3\), then \(2 a+3 b\) is equal to :JEE Mains 2024 Hard