Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Chemical Equilibrium question

2008 · Q114
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Chemistry
  4. /Chemical Equilibrium
  5. /2008 · Q114

Chemical Equilibrium question

2008 · Q114

NEETChemistryChemical EquilibriumMCQ+4 / −1
The dissociation equilibrium of a gass AB2 can be represented as :
2AB2(g) ⇌\rightleftharpoons⇌ 2AB(g) + B2(g)
The degree of dissociation is x and is small compared to 1. The expression relating the degree of dissociation (x) with equilibrium constant Kp and total pressure P is
  1. A
    (2Kp/P)1/2
  2. B
    (Kp/P)
  3. C
    (2Kp/P)
  4. D
    (2Kp/P)1/3
View written solutionFree

Correct answer: D

2AB2(g)⇌2AB(g)+B2(g)
Initial mole200
At equilibrium2(1 - x)2xx


Amount of moles at equilibrium = 2(1 – x) + 2x + x = 2 + x

$${K_p} = {{{{\left[ {{p_{AB}}} \right]}^2}\left[ {{p_{{B_2}}}} \right]} \over {{{\left[ {{p_{A{B_2}}}} \right]}^2}}}$$

= $${{{{\left[ {{{2x} \over {2 + x}} \times P} \right]}^2}\left[ {{x \over {2 + x}} \times P} \right]} \over {{{\left[ {{{2\left( {1 - x} \right)} \over {2 + x}} \times P} \right]}^2}}}$$

= $${{\left[ {{{4{x^3}} \over {2 + x}} \times P} \right]} \over {4{{\left( {1 - x} \right)}^2}}}$$

$ \Rightarrow $ Kp = $${{{4{x^3} \times P} \over 2} \times {1 \over 4}}$$

($ \because $ 1 – x ≈ 1 and 2 + x ≈ 2)

$ \Rightarrow $ x = $${\left( {{{8{K_p}} \over {4P}}} \right)^{{1 \over 3}}}$$

$ \Rightarrow $ x = $${\left( {{{2{K_p}} \over P}} \right)^{{1 \over 3}}}$$
PreviousNext

More from Chemical Equilibrium

  • If the concentration of OH− ions in the reaction Fe(OH)3(s) ⇌ Fe3+(aq) + 3OH−(aq) is decreased by 1/4 times, then equilibrium concentration of Fe3+ will increase by2008 · MCQ
  • The value of equilibrium constant of the reaction HI(g) ⇌ 21​H2(g) + 21​I2(g) is 8.0. The The equilibrium constant of the reaction H2(g) + I2(g) ⇌ 2HI(g) will be2008 · MCQ
  • The values of for the reactions, X ⇌ Y + Z . . . .(i) A ⇌ 2B . . . .(ii) are in the ratio 9 : 1. If degree of dissociation of X and A be equal, then total pressure at equilibrium (i) and (ii) are in…2008 · MCQ
  • The equilibrium constants of the following are N2 + 3H2 ⇌ 2NH3; K1 N2 + O2 ⇌ 2NO; K2 H2 + 21​O2 ⇌ H2O; K3 The equilibrium constant (K) of the reaction : 2NH3 + ${5 \over…2007 · MCQ
  • For the reaction : CH4(g) + 2O2(g) ⇌ CO2(g) + 2H2O(l), ΔHr = − 170.8 kJ mol−1. Which of the following statements is not true?2006 · MCQ
  • Equilibrium constants K1 and K2 for the following equilibriam: are related as Includes diagram2005 · MCQ
  • The equilibrium constants of the following are N2 + 3H2 ⇌ 2NH3; K1 N2 + O2 ⇌ 2NO; K2 H2 + 21​O2 ⇌ H2O; K3 The equilibrium constant (K) of the reaction : 2NH3 + ${5 \over…2003 · MCQ
  • The reaction quotient (Q) for the reaction N2(g) + 3H2(g) ⇌ 2NH3(g) is given by Q=[N2​][H2​]3[NH3​]2​. The reaction will proceed from right…2003 · MCQ