12. Half life period of decomposition of a liquid "A" by irreversible first order reaction is 12 minutes. The time required for 75% conversion of "A" is___________ minutes.
(A) 18
(B) 24
(C) 6
(D) 12

1. A first order gaseous phase reaction is catalyzed by a non-porous solid. The kinetic rate constant and the external mass transfer coefficients are k and kg respectively. The effective rate constant (keft) is given by (A) keff= k+ kg (B) (C) (D)

2. The half-life period of a first order reaction is given by (where k = rate constant). (A) 1.5 k (B) 2.5 k (C) 0.693/k (D) 6.93 k

3. The eddy diffusivity for a liquid in plug flow must be (A) 1  (B)0(C)∞(D) Between 0 and 1

4. The most suitable reactor for carrying out an auto-thermal reaction is a (A) Batch reactor (B) CSTR (C) Semi-batch reactor (D) Plug-flow reactor

5. In an ideal tubular-flow reactor (A) There is no mixing in longitudinal direction. (B) Mixing takes place in radial direction. (C) There is a uniform velocity across the radius. (D) All of the above.

6. A batch reactor is suitable for: (A) Achieving 100 percent conversion of reactants into products (B) Large scale gaseous phase reactions (C) Liquid phase reactions (D) Obtaining uniform polymerization products in highly exothermic reactions

7. If Thiele modulus is____________ considered as negligible. (A) 0 (B)∞(C) ＜0.5 (D) ＞0.5

8. Which of the following chemical reactions will be favored by low pressure? (A) 2HI = H2+ I2 (B) N2O2 = 2NO (C) N2 + O2 = 2NO (D) None of these

9. In an exothermic chemical reaction, the reactants compared to the products have: (A) Higher temperature (B) More energy (C) Less energy (D) Same energy , then the pore diffusion resistance in a catalyst may be

10. In Langmuir treatment of adsorption, (A) Whole surface of the catalyst does not have the same activity for adsorption and there is attraction between the adsorbed molecule (B) Whole surface of the catalyst is essentially uniform and the adsorbed molecule has no effect on the rate of adsorption per site (C) All the adsorption does not take place by the same mechanism (D) Extent of adsorption is more than one complete monomolecular layer on the surface

110年 - 110 國立中央大學_碩士班招生考試_化學工程與材料工程學系/甲組(一般生):化工熱力學及化學反應工程#105938

110年 - 110 高雄科技大學_碩士班招生考試_化學工程與材料工程系：化學反應工程(甲組)#104403