Chemical Kinetics Surface Chemistry Test Online MCQs

1. Purple of cassius is colloidal solution of:

2. The physical adsorption of gases on the solid surface is due to:

3. The rate constant for the reaction, 2N₂O₅ → 4NO₂ + O₂ is 3.0 x 10⁻⁴ s⁻¹. If start made with 1.0 mol L⁻¹ of N₂O₅, calculate the rate of formation of NO₂ at the moment of the reaction when concentration of O₂ is 0.1 mol L⁻¹.

4. Which of the following is not a green house gas?

5. The rate constant of first order reaction is 3 x 10⁻⁶ per second. The initial concentration is 0.10 M. The initial rate is:

6. Which of the following molecules is most suitable to disperse benzene in water?

(a) 

(b) 

(c)  

(d) 

7. Which of the following statement is true for the reaction, H₂ + Br₂ → 2HBr The rate law is dx/dt = k[H₂][Br₂]^1/2:

8. The electrical charge on a colloidal particle is observed by

9. Which of the following graphs represent relation between initial concentration of reactants and half-life for third order reaction?    

(a) 

(b) 

(c) 

(d) 

10. The density of gold is 19 g/cm³. If 1.9 x 10⁻⁴ g of gold is dispersed in one liter of water to give a sol having spherical gold particles of radius 10nm, then the number of gold particles per mm³ of the sol will be:

11. The movement of colloidal particles, under applied electric current is known as:

12. Milk is colloid in which

13. for a first order reaction, to obtain a positive slope, we need to plot {where [A] is the concentration of reactant A}

14. Which of the following electrolyte will have maximum flocculation value for Fe(OH)₃ sol?

15. An endothermic reaction with high activation energy for the forward reaction is given by the diagram:

(a) 

(b) 

(c) 

(d)