Bihar Board - Class 12 - Chemistry - Chapter 5: Surface Chemistry Multiple Choice Questions ( MCQs)
The multiple choice questions for Chapter 5: Surface Chemistry of Class 12 Chemistry are provided here in English. These questions are based on the NCERT curriculum for Class 12. They are designed to help students assess their understanding of the key concepts covered in the chapter. These multiple choice questions will be useful not only for the Class 12 board exams but also for entrance exams like NEET. The questions for Bihar Board Class 12 Chemistry, Chapter 5: Surface Chemistry, have been prepared by expert teachers at Vidyakul.
Multiple Choice Question
1. When the molecules of a substance are kept at the surface of a solid or a liquid, what is the name of the process?
(A) Absorption
(B) Adsorption
(C) Sorption
(D) Desorption
Answer: (B) Adsorption
2. Which of the following assertions about the extent of physisorption is correct?
(A) Increases with increase in temperature
(B) Decreases with increase in surface area
(C) Decreases with increase in the strength of Van der Waals forces
(D) Decreases with increase in temperature
Answer: (D) Decreases with increase in temperature
3. Which of the following is a sorption example?
(A) Sponge in water
(B) Cotton dipped in ink
(C) Water on silica gel
(D) Oxygen on the metal surface
Answer: (B) Cotton dipped in ink
4. Which of the following gasses present in a polluted area will be absorbed most easily on the charcoal gas mask ?
(A) H2
(B) O3
(C) N2
(D) SO2
Answer ⇒ (D) SO2
5. The term ‘sorption’ stands for
(A) absorption
(B) adsorption
(C) both absorption and adsorption
(D) desorption
Answer ⇒ (C) both absorption and adsorption
6. Which of the following electrolysis will have maximum coagulating value of Agl/Ag + sol ?
(A) Na2S
(B) Na3PO4
(C) Na2SO4
(D) NaCl
Answer ⇒ (B) Na3PO4
7. Which of the following is an example of a solid- solid system ?
(A) Smoke
(B) Cake
(C) Synthetic gems
(D) Pumice stone
Answer ⇒(C) Synthetic gems
8. The correct ascending order of adsorption of the following gasses on the same mass of charcoal at same temperature and pressure is
(A) CH4<H2<SO4
(B) H2 < CH4 < SO2
(C) SO2<CH4<H2
(D) H2 < SO2 < CH4
Answer: (B) H2 < CH4 < SO2
9. The formation of micelles takes place only above
(A) Inversion temperature
(B) Boyle’s temperature
(C) Critical temperature
(D) Kraft temperature
Answer: (D) Kraft temperature
10. If V is amount of adsorbate and '/n' is the amount of adsorbent, which of the following is related to the adsorption process?
(A) xm=f(P) at constant T
(B) xm=f(T) at constant P
(C) P=f(T) at constant xm
(D) xm=P T
Answer: (D) xm=P T
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