JEE Mains · Chemistry · STD 11 - 6.1. Equilibrium - 1 (chemical Equilibrium)
At a certain temperature, only \(50\%\) \(HI\) is dissociated into \(H_2\) and \(I_2\) at equilibrium. The equilibrium constant is
- A \(0.25\)
- B \(3\)
- C \(0.5\)
- D \(1\)
Answer & Solution
Correct Answer
(A) \(0.25\)
Step-by-step Solution
Detailed explanation
\(\begin{array}{l}2 HI \quad\quad\rightleftharpoons\quad H _2\quad+\quad I _2 \\ a\quad\quad\quad\quad\quad\quad0\quad\quad\quad\quad0 \\ a (1-0.5) \quad\quad0.25 a \quad\quad0.25 a \end{array}\) \(K =\frac{(0.25 a )(0.25 a )}{(0.5 a )^2}\) \(K =0.25\)
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
- Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy \((CFSE)\) value. Complexes : \(\left[\mathrm{CoF}_{6}\right]^{3-},\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+},\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\) and \(\left[\mathrm{Co}(\mathrm{en})_{3}\right]^{3+}\) \(\quad\quad\quad\quad\quad\quad A\quad\quad\quad\quad \quad B\quad\quad\quad\quad\quad\quad C\quad\quad\quad\quad\quad\quad D\) Choose the correct option:JEE Mains 2021 Medium
- Match List \(-I\) with List \(- II\)
Choose the most appropriate answer from the options given belowList \(- I\) Electronic configuration of elements List \(- II\) \(\Delta_{ i }\) in \(kJ\, mol-1\) \((a)\) \(1 s ^{2} 2 s ^{2}\) \((i)\) \(801\) \((b)\) \(1 s ^{2} 2 s ^{2} 2 p ^{4}\) \((ii)\) \(899\) \((c)\) \(1 s^{2} 2 s^{2} 2 p^{3}\) \((iii)\) \(1314\) \((d)\) \(1 s ^{2} 2 s ^{2} 2 p ^{1}\) \((iv)\) \(1402\) JEE Mains 2021 Easy - Consider the following chemical equilibrium of the gas phase reaction at a constant temperature :
\(\mathrm{A}(\mathrm{~g}) \rightleftharpoons \mathrm{B}(\mathrm{~g})+\mathrm{C}(\mathrm{~g})\)
If \(p\) being the total pressure, \(K_p\) is the pressure equilibrium constant and \(\alpha\) is the degree of dissociation, then which of the following is true at equilibrium?JEE Mains 2025 Hard - \(0.01\, M\, KMnO _{4}\) solution was added to \(20.0\, mL\) of \(0.05\, M\) Mohr's salt solution through a burette. The initial reading of \(50\, mL\) burette is zero. The volume of \(KMnO _{4}\) solution left in the burette after the end point is \(.....\,mL\). (nearest integer)JEE Mains 2022 Medium
- The correct statements among \((a)\) to \((b)\) are: \((a)\) saline hydrides produce \(H_2\) gas when reacted with \(H_2O.\) \((b)\) reaction of \(LiAH_4\) with \(BF_3\) leads to \(B_2H_6.\) \((c)\) \(PH_3\) and \(CH_4\) are electron - rich and electron-precise hydrides, respectively. \((d)\) \(HF\) and \(CH_4\) are called as molecular hydrides.JEE Mains 2019 Hard
- Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?JEE Mains 2025 Easy
More PYQs from JEE Mains
- One of the points of intersection of the curves \(\mathrm{y}=1+3 \mathrm{x}-2 \mathrm{x}^2\) and \(\mathrm{y}=\frac{1}{\mathrm{x}}\) is \(\left(\frac{1}{2}, 2\right)\). Let the area of the region enclosed by these curves be \(\frac{1}{24}(\ell \sqrt{5}+\mathrm{m})-\operatorname{nlog}_{\mathrm{e}}(1+\sqrt{5})\), where \(\ell, \mathrm{m}, \mathrm{n} \in\) \(\mathrm{N}\). Then \(\ell+\mathrm{m}+\mathrm{n}\) is equal toJEE Mains 2024 Hard
- The motion of a mass on a spring, with spring constant \({K}\) is as shown in figure. The equation of motion is given by \(x(t)= A sin \omega t+ Bcos\omega t\) with \(\omega=\sqrt{\frac{K}{m}}\) Suppose that at time \(t=0\), the position of mass is \(x(0)\) and velocity \(v(0)\), then its displacement can also be represented as \(x(t)=C \cos (\omega t-\phi)\), where \(C\) and \(\phi\) are
JEE Mains 2021 Hard - A \(100\,m\) long wire having cross-sectional area \(6.25 \times 10^{-4}\,m ^2\) and Young's modulus is \(10^{10}\,Nm ^{-2}\) is subjected to a load of \(250\,N\), then the elongation in the wire will be :JEE Mains 2023 Easy
- In which of the following order the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment? \((i)\) \(\left[ FeF _{6}\right]^{3-}\) \((ii)\) \(\left[ Co \left( NH _{3}\right)_{6}\right]^{3+}\) \((iii)\) \(\left[ NiCl _{4}\right]^{2-}\) \((iv)\) \(\left[ Cu \left( NH _{3}\right)_{4}\right]^{2+}\)JEE Mains 2021 Hard
- Identify the correct order of reactivity for the following pairs towards the respective mechanism Choose the correct answer from the options given below:
JEE Mains 2023 Hard - Five digit numbers are formed using the digits \(1,2 , 3,5,7\) with repetitions and are written in descending order with serial numbers. For example, the number \(77777\) has serial number \(1\). Then the serial number of \(35337\) is \(.........\).JEE Mains 2023 Hard