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 _____________________?

Related Mcqs:

1. In chamber process of sulphuric acid manufacture in industry, the gas phase oxidation of SO2 to SO3 is accomplished by a ______________ reaction ?

   A. Non-catalytic homogeneous
   B. Non-catalytic heterogeneous
   C. Catalytic homogenous
   D. Catalytic heterogeneous

2. 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

3. The catalytic converter for conversion of SO2 to SO3 by contact process should have a feed with SO2 content between___________________?

   A. 2-5 %
   B. 7-10 %
   C. 12-15 %
   D. 20-25 %

4. . In the converter of the contact process for the manufacture of H2SO4 the equilibrium conversion of SO2__________ (i) __________ with increase in temperature and __________ (ii) __________ with increase in the mole ratio of SO2 to air?

   A. (i) increases (ii) decreases
   B. (i) decreases (ii) increases
   C. (i) increases (ii) increases
   D. (i) decreases (ii) decreases

5. Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is ?

   A. 0
   B. 1
   C. 2
   D. 3

6. In a chemical reaction, represented by as shown in the bellow figure, it is observed that the (i) Rate of reaction increases by a factor of 4 on doubling the concentration of the reactant. (ii) Rate of reaction increases by a factor of 9 on trebling the concentration of the reactant. Then the rate of the reaction is proportional to(where, CA = concentration of the reactant)_____________________?

   A. CA
   B. CA2
   C. CA3
   D. CA4

7. An endothermic aqueous phase first order irreversible reaction is carried out in an adiabatic plug flow reactor. The rate of reaction ?

   A. Is maximum at the inlet of the reactor
   B. Goes through a maximum along the length of the reactor
   C. Goes through a minimum along the length of the reactor
   D. Is maximum at the exit of the reactor

8. When all the limiting reactant is consumed in the reaction, the operational yield _______________ the relative yield?

   A. Is greater than
   B. Is smaller than
   C. Equals
   D. Can be either greater or smaller than (depends on the type of reaction)

9. For a vapour phase catalytic reaction (A + B → P) which follows the Ridel mechanism and the reaction step is rate controlling, the rate of reaction is given by (reaction rate is irreversible, product also absorbs) ?

   A. -rA = (k . PA . PB)/(1 + KAPA + KPPP)
   B. -rA = (k . PA
   2 – k1PP)/(1 + KAPA + KPPP)
   C. -rA = (k . PA . PB)/(1 + KAPB + KBPB . KPPP)
   D. -rA = (k . PA . PB)/(1 + KAPA)

10. For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of ‘P’ is doubled. If the reaction rate is proportional to Cp n, then what is the value of ‘n’ for this chemical reaction ?

    A. 0
    B. 1
    C. 2
    D. 3