JEE Mains · Chemistry · STD 12 - 3. Chemical kinetics
The number of correct statement/s from the following is _____ .
Larger the activation energy, smaller is the value of the rate constant.
The higher is the activation energy, higher is the value of the temperature coefficient.
At lower temperatures, increase in temperature causes more change in the value of k than at higher temperature.
A plot of \(\ln k\) vs \(\frac{1}{T}\) is a straight line with slope equal to \(-\frac{ Ea }{ R }\)
- A 1
- B 2
- C 3
- D 4
Answer & Solution
Correct Answer
(C) 3
Step-by-step Solution
Detailed explanation
\[ A: k=A e^{-\frac{F a}{R T}} \] As Ea increases k decreases B : Temperature coefficient \(=\frac{ k _{T+10}}{ k _T}\) Option ( C ) is wrong. \(\Delta k\) may be greater or lesser depending on temperature. \(D : \ln k=\operatorname{In} A-\frac{E a}{R T}\)
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/are not correct with respect to energy of atomic orbitals of hydrogen atom?
(A)\(1 \mathrm{~s} \lt 2 \mathrm{p} \lt 3 \mathrm{~d} \lt 4 \mathrm{~s}\)
(B) \(1 \mathrm{~s} \lt 2 \mathrm{~s}=2 \mathrm{p} \lt 3 \mathrm{~s}=3 \mathrm{p}\)
(C) \(1 \mathrm{~s} \lt 2 \mathrm{~s} \lt 2 \mathrm{p} \lt 3 \mathrm{~s} \lt 3 \mathrm{p}\)
(D) \(1 \mathrm{~s} \lt 2 \mathrm{~s} \lt 4 \mathrm{~s} \lt 3 \mathrm{~d}\)
Choose the correct answer from the options given below :JEE Mains 2025 Easy - The correct match between Item\(-I\) (starting material) and Item\(-II\) (reagent) for the preparation of benzaldehyde is : Item\(-I\) Item\(-II\) \((I)\) Benzene \(( P )\) \(HCl\) and \(SnCl _{2}, H _{3} O ^{+}\) \((II)\) Benzonitrile \((Q)\) \(H _{2}, Pd - BaSO _{4}, S\) and quinoline \((III)\) Benzoyl Chloride \((R)\) \(CO , HCl\) and \(AlCl _{3}\)JEE Mains 2020 Hard
- In base \(vs.\) Acid titration, at the end point methyl orange is present asJEE Mains 2022 Medium
- For the adsorption of hydrogen on platinum,the activation energy is \(30\,kJ\,mol ^{-1}\) and for the adsorption of hydrogen on nickel,the activation energy is \(41.4\,kJ\,mol ^{-1}\). The logarithm of the ratio of the rates of chemisorption on equal areas of the metals at \(300\,K\) is \(........\)(Nearest integer)Given: \(\ln 10=2.3 \quad R=8.3\,JK ^{-1}\,mol ^{-1}\)JEE Mains 2023 Medium
- Identify the name reaction.
JEE Mains 2024 Hard - The standard enthalpies of formation of \(Al _{2} O _{3}\) and \(CaO\) are \(-1675\, kJ\, mol ^{-1}\) and \(-635\, kJ\, mol ^{-1}\) respectively. For the reaction \(3 CaO +2 Al \rightarrow 3 Ca + Al _{2} O _{3}\) the standard reaction enthalpy \(\Delta_{ r } H ^{0=}\) .......... \(kJ\). (Round off to the Nearest Integer).JEE Mains 2021 Medium
More PYQs from JEE Mains
- Consider the three planes \(P_{1}: 3 x+15 y+21 z=9\) ; \(P _{2}: x -3 y - z =5,\) and ; \(P_{3}: 2 x+10 y+14 z=5\). Then, which one of the following is true ?JEE Mains 2021 Medium
- Let \(\vec \alpha =(\lambda -2) \vec a + \vec b\) and \(\vec \beta = (4\lambda -2)\vec a + 3\vec b\) be two given vectors where \(\vec a\) and \(\vec b\) are non collinear. The value of \(\lambda \) for which vectors and \(\vec \alpha \) and \(\vec \beta \) are collinear, isJEE Mains 2019 Medium
- In an electron microscope, the resolution that can be achieved is of the order of the wavelength of electrons used. To resolve a width of \(7.5 \times 10^{-12}\, m\), the minimum electron energy required is close to .............. \(keV\)JEE Mains 2019 Medium
- If \(f(a+b+1-x)=f(x),\) for all \(x,\) where \(a\) and \(b\) are fixed positive real numbers, then \(\frac{1}{a+b} \int\limits_{a}^{b} x(f(x)+f(x+1)) d x\) is equal toJEE Mains 2020 Hard
- In an experiment to find out the diameter of wire using screw gauge, the following observation were noted. \((a)\) Screw moves \(0.5\,mm\) on main scale in one complete rotation \((b)\) Total divisions on circular scale \(=50\) \((c)\) Main scale reading is \(2.5\,mm\) \((d)\) \(45^{\text {th }}\) division of circular scale is in the pitch line \((e)\) Instrument has \(0.03 \;mm\) negative error Then the diameter of wire is \(...........\,mm\)
JEE Mains 2022 Medium - The induced \(emf\) can be produced in a coil by \(A.\) moving the coil with uniform speed inside magnetic field \(B.\) moving the coil with non-uniform speed inside uniform magnetic field \(C.\) rotating the coil inside the uniform magnetic field \(D.\) changing the area of the coil inside the uniform magnetic field Choose the correct answer from the options given below:JEE Mains 2023 Medium