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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Chemical Equilibrium

NTA Abhyas 2020 · Chemistry · Chemical Equilibrium

Phosgene, COC l _ 2 , a poisonous gas decomposes according to the...

Phosgene, COCl2COC{l}_{2} , a poisonous gas decomposes according to the equation

COCl2(g)⇌COCOC{l}_{2} \left(g\right) ⇌ CO\left(g\right) + Cl2(g)C{l}_{2}\left(g\right)

If Kc=0.083{K}_{c} = 0.083 at 900°C900 ° C , what is the value of Kc?{K}_{c} ?

Options

  1. A0.125
  2. B8.0
  3. C6.1
  4. D0.16

Correct answer

B. 8.0

Step-by-step solution

Kp=Kc(RT)Δng{K}_{p} = {K}_{c}{\left(RT\right)}^{\Delta{n}_{g}}

where \Delta{n}_{g} = \left(1 + 1\right) - 1 = 1, R, = 0.082\text{L atm mo}{\textl^{- 1}K^{- 1} and T=1173T = 1173 K

So Kp=Kc(RT)1=0.083×0.082×1173{K}_{p} = {K}_{c} ( RT{)}^{1} = 0.083 \times 0.082 \times 1173

7.98≃8.07.98 ≃ 8.0
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