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

Related Mcqs:

1. 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

2. Calcination reaction of limestone (CaCO3 → CaO + CO2) goes to completion in the rotary kiln, because____________________?

   A. CaO is not dissociated
   B. CO2 escapes continuously
   C. Of high calcination temperature
   D. CaO is more stable than CaCO3

3. If helium is introduced in a reactor containing O2, SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 (as per Le Chatelier’s principle)?

   A. Decreases
   B. Increases
   C. Remains unaltered
   D. Changes unpredictably

4. A chemical reaction, A → 3B, is conducted in a constant pressure vessel. Starting with pure A, the volume of the reaction mixture increases 3 times in 6 minutes. The fractional conversion is ___________________?

   A. 0.33
   B. 0.5
   C. 1
   D. Data insufficient, can’t be predicted

5. 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

6. 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 ?

   A. K3 = K1.K2
   B. K3 = (K1.K2)0.5
   C. K3(K1+K2)/2
   D. K3 = (K1.K2)2

7. The exit age distribution of a fluid leaving a vessel (denoted by E) is used to study the extent of non-ideal flow in the vessel. The value of ∫∞ 0 E.dt is____________________?

   A. 0
   B. 1
   C. ∞
   D. √2π

8. Which of the following is not endothermic in nature ?

   A. Combustion of sulphur
   B. Gasification of carbon
   C. Thermal cracking of fuel oil
   D. Steam reforming of naphtha

9. Maximum equilibrium conversion for endothermic reaction is obtained at the ______________ temperature?

   A. Highest possible
   B. Lowest possible
   C. Intermediate
   D. Room

10. During manufacture of H2SO4, the oxidation of SO2 to SO3 by oxygen is an endothermic reaction. The yield of SO3 will be maximised, if the _____________________?

    A. Temperature is increased
    B. Pressure is reduced
    C. Temperature is increased and pressure is reduced
    D. Temperature is reduced and pressure is increased