Which of the following statements is not correct?(a) Catalyst is not involved in the reaction(b) The concentration of a catalyst remains constant throughout the progress of chemical reaction(c) The mechanism of catalytic reactions may vary from reaction to reaction(d) NO acts as a homogenous catalyst in the oxidation of SO2 to SO3This question was posed to me during an interview for a job.The query is from Surface Chemistry topic in portion Surface Chemistry of Chemistry – Class 12

Which of the following statements is not correct?(a) Catalyst is not i

1.	Which of the following statements is not correct?(a) Catalyst is not involved in the reaction(b) The concentration of a catalyst remains constant throughout the progress of chemical reaction(c) The mechanism of catalytic reactions may vary from reaction to reaction(d) NO acts as a homogenous catalyst in the oxidation of SO2 to SO3This question was posed to me during an interview for a job.The query is from Surface Chemistry topic in portion Surface Chemistry of Chemistry – Class 12
Answer» The correct answer is (a) Catalyst is not INVOLVED in the REACTION The EXPLANATION: Catalyst is a substance which increases or decreases the rate of reaction but itself does not undergo any chemical change during the reaction. Catalysts that increase the rate are CALLED positive catalysts and the catalysts that decrease the rate are called NEGATIVE catalysts.

Discussion

No Comment Found

Related InterviewSolutions

Which of the following colloidal system represents a gel?(a) Solid in liquid(b) Solid in gas(c) Liquid in solid(d) Liquid in gasThis question was posed to me during an online interview.This key question is from Surface Chemistry in portion Surface Chemistry of Chemistry – Class 12
What is the range of the size of colloidal particles?(a) 1 to 100 nm(b) 10 to 100 pm(c) 1 to 100 µm(d) 1 to 10 mmI have been asked this question in an internship interview.My doubt stems from Surface Chemistry topic in portion Surface Chemistry of Chemistry – Class 12
Which of the following statements is incorrect with respect to physisorption?(a) It is reversible(b) It is spontaneous(c) ΔH < 0(d) ΔS > 0The question was posed to me during an online exam.I'd like to ask this question from Surface Chemistry in division Surface Chemistry of Chemistry – Class 12
By using what can the colloidal particles can be separated from particles of true solution?(a) Parchment paper(b) An ultracentrifuge machine(c) An electrolyte(d) Ordinary clothThis question was addressed to me in an interview.This question is from Surface Chemistry topic in chapter Surface Chemistry of Chemistry – Class 12
Which of the following statement about emulsions is true?(a) Oily drugs cannot be prepared in the form of emulsions(b) Digestion does not involve the process of emulsification(c) Disinfectants like Dettol and Lysol give emulsions of water-in-oil type on mixing with water(d) The cleansing action of soap is based upon the formation of water-in-oil emulsionThis question was addressed to me in homework.This interesting question is from Surface Chemistry topic in chapter Surface Chemistry of Chemistry – Class 12
What are the dispersed phase and dispersion medium in alcohol respectively?(a) Alcohol, water(b) Solid, water(c) Water, alcohol(d) Solid, alcoholThe question was posed to me in final exam.The origin of the question is Surface Chemistry in portion Surface Chemistry of Chemistry – Class 12
Which of the following decreases the rate of reactions?(a) Catalytic promoters(b) Homogeneous catalyst(c) Catalytic poison(d) Heterogeneous catalystI had been asked this question in quiz.I'm obligated to ask this question of Surface Chemistry in section Surface Chemistry of Chemistry – Class 12
How does a catalyst change during a reaction?(a) Physically(b) Mass-wise(c) Chemically(d) QuantitativelyThe question was posed to me in an international level competition.This question is from Surface Chemistry in chapter Surface Chemistry of Chemistry – Class 12
In physisorption, the adsorbent does not show specificity towards a particular gas.(a) True(b) FalseI got this question by my school principal while I was bunking the class.My question is based upon Surface Chemistry topic in portion Surface Chemistry of Chemistry – Class 12
Which of the following forces is involved in physical adsorption?(a) Gravitational force(b) Magnetic force(c) Van der Waals force(d) Electromagnetic forceThis question was posed to me by my college director while I was bunking the class.I need to ask this question from Surface Chemistry in portion Surface Chemistry of Chemistry – Class 12

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment