Description : Penicillin is separated from fermented broth by (A) Extraction with amyl or butyl acetate (B) Ternary Azeotropic distillation (C) Evaporator in calandria (D) Extractive distillation
Last Answer : (A) Extraction with amyl or butyl acetate
Description : Heat sensitive materials with very high latent heat of vaporisation may be economically separated using (A) Liquid extraction (B) Distillation (C) Evaporation (D) Absorption
Last Answer : (A) Liquid extraction
Description : Acetic acid will be most economically separated from a dilute solution of acetic acid in water by (A) Solvent extraction (B) Continuous distillation (C) Evaporation (D) Absorption
Last Answer : (A) Solvent extraction
Description : The maximum concentration of ethanol that is achieved by successive distillation of fermentation broth in continuous stills is A- .60% B- 95% C- .70% D- 99%
Last Answer : 95%
Description : Black liquor is converted into white liquor by (A) Evaporation and burning the concentrate followed by causticisation of products (B) Multi-effect evaporation only (C) Selective liquid extraction (D) Extractive distillation
Last Answer : (A) Evaporation and burning the concentrate followed by causticisation of products
Description : Glycerine is recovered from lye by (A) Evaporation followed by vacuum distillation (B) Liquid extraction technique (C) Extractive distillation technique (D) None of these
Last Answer : (A) Evaporation followed by vacuum distillation
Description : The most important application of distribution law is in (A) Evaporation (B) Liquid extraction (C) Drying (D) Distillation
Last Answer : (B) Liquid extraction
Description : The solvent used in liquid extraction should not have high latent heat of vaporisation, because (A) The pressure drop and hence the pumping cost will be very high (B) It cannot ... by distillation may be prohibitively high (D) It will decompose while recovering by distillation
Last Answer : (C) Its recovery cost by distillation may be prohibitively high
Description : Separation of two or more components of a liquid solution cannot beachieved by (A) Fractional crystallisation (B) Liquid extraction (C) Absorption (D) Evaporation
Last Answer : (C) Absorption
Description : Which of the following unit operations makes use of Thiele-Geddes equation? (A) Liquid-liquid extraction (B) Solid-liquid extraction (C) Multi-component absorption with chemical reaction (D) Multi-component distillation
Last Answer : (D) Multi-component distillation
Description : Steady state equimolal counter diffusion occurs in case of (A) Leaching (B) Absorption (C) Binary phase distillation (D) Liquid-liquid extraction
Last Answer : (C) Binary phase distillation
Description : Pick out the wrong statement. (A) Critical moisture content is not a property of the material itself (B) A sharp increase in pressure drop gives an indication of the flooding in a ... unity (D) Dehydration of ethyl alcohol is most economically done by molecular distillation at very high vacuum
Last Answer : (D) Dehydration of ethyl alcohol is most economically done by molecular distillation at very high vacuum
Description : Extraction of coffee from its seed is done by (A) Liquid-liquid extraction (B) Leaching (C) Extractive distillation (D) Steam distillation
Last Answer : (B) Leaching
Description : In which of the following unit operations, the selectivity is an important parameter? (A) Distillation (B) Solvent extraction (C) Absorption (D) None of these
Last Answer : (B) Solvent extraction
Description : Pick out the wrong statement. (A) With decrease in feed temperature, the number of plates required for binary distillation decreases for a given L/V' ratio (B) The extraction per unit ... and its crosssection is wider at the bottom (D) Vander wall adsorption is also called chemisorption
Last Answer : (D) Vander wall adsorption is also called chemisorption
Description : Steady state equimolal counter diffusion is encountered in (A) Separation of a binary mixture by distillation (B) Absorption of NH3 from air by water (C) All liquid-liquid diffusion systems (D) All liquid-solid diffusion systems
Last Answer : (A) Separation of a binary mixture by distillation
Description : The fermenter used in the production of penicillin (by deep fermentation process) is made of (A) Glass (B) Glass lined steel (C) High silicon cast iron (D) Porcelain
Last Answer : (B) Glass lined steel
Description : Fermenter used in the production of penicillin by deep fermentation process is a __________ lined steel vessel (A) Rubber (B) Monel (C) Glass (D) Nickel
Last Answer : (C) Glass
Description : Penicillin is made employing __________ fermentation process. (A) Continuous (B) Aerobic batch (C) Anaerobic batch (D) None of these
Last Answer : (B) Aerobic batch
Description : Tea percolation employs (A) Liquid-liquid extraction (B) Leaching (C) Absorption (D) None of these
Description : Which one of the following devices is not used for both the absorption as well as the liquid-liquid extraction processes? (A) Packed towers (B) Plate towers (C) Spray towers (D) Wetted wall columns
Last Answer : (D) Wetted wall columns
Description : Air used in aerobic fermentation must be sterilized, otherwise the (A) Recovery of product will be difficult (B) Contamination of pure culture would result (C) Uniformity of product cannot be achieved (D) None of these
Last Answer : (B) Contamination of pure culture would result
Description : Extraction of penicillin employs a __________ extraction column. (A) Centrifugal (B) Packed (C) Plate (D) None of these
Last Answer : (A) Centrifugal
Description : Pick out the wrong statement. (A) In case of heat transfer by purely forced convection, GR /Re 2 ≤ 1 (B) The equivalent diameter of heat transfer for a duct of ... nucleate boiling depends basically on the ease with which the bubbles are formed and detached from the heating surface
Last Answer : (B) The equivalent diameter of heat transfer for a duct of square crosssection (having each side as 'x') is equal to 4x
Description : Duhring’s rule is important in solving problems on (A) Distillation (B) Crystallisation (C) Evaporation (D) Humidification
Last Answer : (C) Evaporation
Description : Duhring's plot' is of use in (A) Extractive distillation (B) Evaporation
Last Answer : (B) Evaporation
Description : Cheese and yoghurt are products of: (a) Pasteurization (b) Fermentation (c) Dehydration (d) Distillation
Last Answer : Ans. ((b))
Description : The method used to obtain alcohol from molasses is called – (1) distillation (2) hydrolysis (3) fermentation (4) oxidation
Last Answer : (3) fermentation Explanation: On industrial scale, ethanol can be prepared by the fermentation of molasses. Molasses is the mother liquor left after the crystallization of sugarcane juice. It is a dark colored viscous liquid. Molasses contains about 60% fermentable sugar.
Description : The method used to obtain alcohol from molasses is called (1) distillation (2) hydrolysis (3) fermentation (4) oxidation
Last Answer : fermentation
Description : A binary mixture of benzene and cyclohexane is separated by (A) Flash vaporisation (B) Extractive distillation (C) Solvent extraction (D) Ordinary distillation
Last Answer : (B) Extractive distillation
Description : Pick out the wrong statement. (A) In solvent extraction, the distribution co-efficient should be as large as possible for solvent economy (B) With increase in pressure, the solubility of ... in distillation column (D) The capacity of a distillation column is maximum at total reflux
Last Answer : (D) The capacity of a distillation column is maximum at total reflux
Description : Essential oils are usually obtained using (A) Steam distillation (B) Extractive distillation (C) Solvent extraction (D) Leaching
Last Answer : (D) Leaching
Description : How do prepare a patient with rheumatic fever before extraction: A. 6000000 units of benzoyl penicillin B. 2g Amoxicillin pre-operatively
Last Answer : B. 2g Amoxicillin pre-operatively
Description : Consider the following processes: 1. Evaporation 2. Fractional distillation 3. Distillation 4. Filtration The process(es) involved in the refining of crude oil is/ are: (a) 3 only (b) 2 and 3 (c) 3 only (d) 1 only
Last Answer : Ans:(b)
Description : A mixture of water and alcohol can be separated by – (1) Filtration (2) Evaporation (3) Decantation (4) Distillation
Last Answer : (4) Distillation Explanation: A mixture of water and alcohol is separated by the process of distillation. At 780C, alcohol starts to vaporize. The vapours are condensed in the condenser and alcohol is collected in the receiver.
Description : Water can be separated from alcohol water mixture by – (1) decantation (2) evaporation (3) distillation (4) sublimation
Last Answer : (3) distillation Explanation: Distillation is a method of separating mixtures based on differences in volatilities of components in a boiling liquid mixture. Distillation is a unit operation, or a ... is distilled to separate its components- notably oxygen, nitrogen, and argon- for industrial use.
Description : Sea water can be purified by the process of – (1) distillation (2) evaporation (3) filtration (4) fractional distillation
Last Answer : (1) distillation Explanation: The traditional process used in desalination operations is vacuum distillation- essentially the boiling of water at less than atmospheric pressure and thus a much ... when the vapor pressure equals the ambient pressure and vapor pressure increases with temperature.
Description : A mixture of water and alcohol can be separated by - (1) Filtration (2) Evaporation (3) Distillation (4) Decantation
Last Answer : (3) Distillation Explanation: Simple distillation is a procedure by which two liquids with different boiling points can be separated.
Description : Differentiate between Evaporation and Distillation and explain the working and application of simple distillation.
Last Answer : Evaporation Distillation: 1. Free escape of vapors from the surface of liquid below its boiling point. Evaporation takes place even at room temperature 1) Process of ... Concentration of liquid and to separate non volatile solid from the volatile liquid such as alcohol and ether.
Description : A mixture of water and alcohol can be separated by (1) Filtration (2) Evaporation (3) Decantation (4) Distillation
Last Answer : Distillation
Description : Sea water can be purified by the process of (1) distillation (2) evaporation (3) filtration (4) fractional distillation
Last Answer : distillation
Description : Water can be separated from alcohol water mixture by (1) decantation (2) evaporation (3) distillation (4) sublimation
Description : Dearomatization of kerosene (by liquid sulphur dioxide extraction) is done to (A) Increase its smoke point (B) Improve its oxidation stability (C) Decrease the breathing loss (D) None of these
Last Answer : (B) Improve its oxidation stability
Description : For which of the following unit operations, Lewis number is ofsignificance? (A) Adsorption (B) Binary distillation (C) Gas absorption (D) Humidification
Last Answer : (D) Humidification
Description : Langmuir equation is associated with (A) Leaching (B) Adsorption (C) Steam distillation (D) Multi-component absorption
Last Answer : (B) Adsorption
Description : ADDUCTS' and 'CLATHRATES' are used in case of (A) Extractive distillation (B) Crystallisation (C) Absorption (D) None of these
Last Answer : (B) Crystallisation
Description : Pick out the correct statement. (A) Higher hold up of the solid in the rotary dryer results in better exposure of the solids to the gas (B) The 'Hatta number' is ... reflux in case of distillation operation requires infinite number of plates for a binary system separation
Last Answer : (C) For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is linear in the case of steady state equimolal counter-diffusion
Description : The Hatta number is important in (A) Multi-component distillation (B) Binary distillation (C) Gas absorption without chemical reaction (D) Gas absorption with chemical reaction
Last Answer : (D) Gas absorption with chemical reaction
Description : When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system ... at the concentration of the plait point (D) All (A), (B) and (C
Last Answer : (D) All (A), (B) and (C
Description : A 'unit process' is exemplified by the (A) Distillation (B) Hydrogenation of oils (C) Absorption (D) Humidification
Last Answer : (B) Hydrogenation of oils