At a given temperature, K1, K2 and K3 are equilibrium constants for the following reactions 1, 2, 3 respectively. CH4(g) + H2O(g) ⇌ CO(g) + 3H2(g), CO(g) + H2O(g) ⇌ CO2(g) + H2(g) CH4(g) + 2H2O(g) ⇌ CO2(g) + 4H2(g) Then K1, K2 and K3 are related as ?

Related Mcqs:

1. Given, 3H2 + CO = CH4 + H2O, KP = 101.84 and, 4H2 + CO2 = CH4 + 2H2O, KP = 101.17 the KP for the reaction CO + H2O = CO2 + H2 is __________________?

   A. 103.01
   B. 10-0.67
   C. 10-3.01
   D. 100.67

2. Pure ethanol vapor is fed to a reactor packed with alumina catalyst, at the rate of 100 kmole / hr. The reactor products comprise: ethylene: 95 kmole / hr, water vapour: 97.5 k mole / hr and diethyl ether: 2.5 kmole/hr. The reactions occuring can be represented by: C2H5OH → C2H4 + H2O 2C2H5OH → C2H5 – O – C2H5 + H2O The percent conversion of ethanol in the reactor is________________?

   A. 100
   B. 97.5
   C. 95
   D. 2.5

3. The rate expression for a heterogeneous catalytic reaction is given by, – rA = K.KA PA(1 + KA.PA + KR.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A) ?

   A. E
   B. E + ΔHA
   C. E + ΔHA – ΔHR)
   D. ΔHA + ΔHR

4. In the hydrodealkylation of toluene to benzene, the following reactions occur: C7H8 + H2 → C6H6 + CH4 2C6H6 ⇌ C12H10 + H2 Toluene and hydrogen are fed to a reactor in a molar ratio 1:5.80% of the toluene gets converted and the selectivity of benzene(defined as moles of benzene formed/moles of toluene converted) is 90%. The fractional conversion of hydrogen is_______________________?

   A. 0.16
   B. 0.144
   C. 0.152
   D. 0.136

5. The rate of the heterogeneous catalytic reaction A(g) + B(g) → C(g) is given by -rA = k.KA.pA.PB/(1 + KA.PA + Kc.pc), where KA and Kc are the adsorption equilibrium constants. The rate controlling step for this reaction is_______________?

   A. Absorption of A
   B. Surface reaction between absorbed A and absorbed B
   C. Surface reaction between absorbed A and B in the gas phase
   D. Surface reaction between A in the gas phase and absorbed B

6. In the gaseous phase ammonia formation reaction (N2 + 3H2 ⇌ 2NH3), the value of the equilibrium constant depends on the_________________?

   A. Total pressure of the system
   B. Volume of the reactor
   C. Temperature
   D. Initial concentration of N2 and H2

7. The rate controlling step for the heterogeneous irreversible catalytic reaction A(g) + B(g) → C(g) is the surface reaction of absorbed A with absorbed B to give adsorbed C. The rate expression for this reaction can then be written as (where, KA, KB and KC are the equilibrium constants and is the rate constant of the rate controlling step) ?

   A. k KA pApB / (1 + KApA + KBpB)
   B. k KAKB pApB / (1 + KApA + KBpB)
   C. k KAKB pApB / (1 + KApA + KBpB + KCpC)
   D. k KAKB pApB / (1 + KApA + KBpB + KCpC)2

8. The reaction rate constants at two different temperatures T1 and T2 are related by _________________?

   A. ln (k2/k1) = (E/R) (1/T2 – 1/T1)
   B. ln (k2/k1) = (E/R) (1/T1 – 1/T2)
   C. exp (k2/k1) = (E/R) (1/T2 – 1/T1)
   D. exp (k2/k1) = (E/R) (1/T1 – 1/T2)

9. In case of calcination of limestone, CaCO3 CaO + CO2, the addition of more of CaO will result in _______________ in the concentration of CO2?

   A. No change
   B. Increase
   C. Decrease
   D. Unpredictable from the data

10. Considering the endothermic dissociation of CaCO3 in a closed vessel (CaCO3 ⇌ CaO + CO2), the pressure of CO2 increases, if____________________?

    A. A catalyst is added
    B. The temperature is increased
    C. An inert gas is pumped keeping the temperature constant
    D. None of these