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The surface temperature is lower than in film boiling, Temperature of the heating surface is equal to that in film boiling, 5 times than that in drop-wise condensation, 15 times than that in drop-wise condensation, 25 times than that in drop-wise condensation, 20 times than that in drop-wise condensation, 30 times than that in drop-wise condensation, 10 times than that in drop-wise condensation, 30 times than that in film-wise condensation, 20 times than that in film-wise condensation, 10 times than that in film-wise condensation. The local coefficient of heat transfer for condensation, Remains constant at all heights of the surface, Decreases with increasing distance from the top of the surface, Increases with increasing thickness of film, Increases with increasing temperature differential between the surface and vapour. h VER = 0.943 [k 3 p 2 g h f g/δ l (t sat – t s)] 0.25, h INC = 0.943 [k 3 p 2 g sin α h f g/δ l (t sat – t s)] 0. EduRev is a knowledge-sharing community that depends on everyone being able to pitch in when they know something. The alkali salt acts as a base catalyst, and other bases can be used instead. In film boiling, surface temperature is higher. Condenser in Thermal Power Plant- MCQs with answers Q1. when saturated with HCl, it gives ‘B’of molecular formula. 1 MARK OBJECTIVE QUESTIONS Reverse of boiling is; Solidification; Sublimation; Freezing; None; Ans: (d) Film condensation process If the volume of the reaction vessel is suddenly, reduced to 1/4th of the initial volume, the reaction rate, of borax, the following compound is formed. For example, PhCHO on reaction with excess acetic anhydride in presence of sodium acetate followed by acidification gives cinnamic acid (3-phenyl propenoic acid). Benzene reacts with  CH3COCI in the presence of anhyd. Beautiful, Clear, and Detailed Mechanisms make Learning Organic Chemistry Easier than ever. | {{course.flashcardSetCount}} By continuing, I agree that I am at least 13 years old and have read and agree to the. Acetone is mixed with bleaching powder to give, k [A][B]. View Answer Discuss. In drop-wise condensation, the convective heat transfer coefficient is. (adsbygoogle = window.adsbygoogle || []).push({}); ME Subjects – Concepts Simplified  © 2020, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), https://www.mesubjects.net/wp-admin/post.php?post=6628&action=edit, https://www.mesubjects.net/wp-admin/post.php?post=6459&action=edit, https://www.mesubjects.net/wp-admin/post.php?post=6258&action=edit, https://www.mesubjects.net/wp-admin/post.php?post=4115&action=edit, Interview Short Question Answers : Conduction-3, Boot strap and Reduced Ambient Aircraft Cooling Systems, CLOSE COILED HELICAL SPRING -AXIAL TORQUE, Greater than that in drop-wise condensation, Lower than that in drop-wise condensation. Which of the following is NOT a type of condensation heat transfer process? Identify the correct statements. As a member, you'll also get unlimited access to over 83,000 lessons in math, The reaction is similar to aldol condensation. A-1, Acharya Nikatan, Mayur Vihar, Phase-1, Central Market, New Delhi-110091. Depending upon the behavior of condensate up on the cooled surface, the condensation process are classified into how many distinct modes? The Perkin reaction is an organic reaction developed by William Henry Perkin that is used to make cinnamic acids. Perkin condensation reaction is also used to prepare coumarin industrially from salicylaldehyde. Example. Earn Transferable Credit & Get your Degree, Create your account to access this entire worksheet, A Premium account gives you access to all lesson, practice exams, quizzes & worksheets, AP Biology - Organic Chemistry: Tutoring Solution. (iii) Evaporators Question No : 107 The ratio of the energy absorbed by the body to total energy falling on it is called . long questions & short questions for NEET on EduRev as well by searching above. It decreases with increasing thickness of condensate film. If the rate is 2.40 x 10-5 mol liter-1 sec -1, then the concentration of  N2O5 ( in mol liter-1), The rate law for a reaction between the substances A and B is given by Rate = k [ A ]n [ B ]m On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be, Borax is prepared by treating colemanite with, Which of the following compounds are formed when boron trichloride is treated with water. Aldol condensation is a reaction between an enol molecule and an aldehyde. List of Name Reaction of Organic Chemistry consist of detail Reaction Mechanism of all name reactions of Organic Chemistry. Share this question with your friends. https://www.mesubjects.net/wp-admin/post.php?post=6628&action=edit      PTU HT Paper Sol A, https://www.mesubjects.net/wp-admin/post.php?post=6459&action=edit     Question Bank Radiation, https://www.mesubjects.net/wp-admin/post.php?post=6258&action=edit      MCQ conduction-1, https://www.mesubjects.net/wp-admin/post.php?post=4115&action=edit       MCQ Conduction-2, (c) Under isobaric as well as isothermal conditions, 9. You will receive your score and answers at the end. The carbanion then attacks the aromatic aldehyde to yield alkoxide anion. A Absorptive power .

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