Description : Common salt is generally not produced commonly by __________ method from brine. (A) Freeze drying (B) Electrolytic (C) Solar evaporation (D) Vacuum evaporation
Last Answer : (A) Freeze drying
Description : Common salt is produced from sea water in India generally by the __________ method. (A) Freeze drying (B) Solar evaporation (C) Electrolytic (D) None of these
Last Answer : B) Solar evaporation
Description : A gas P is obtained at anode during the electrolysis of brine. The gas P when treated with excess of `NH_3` released a diatomic gas Q. Find the value
Last Answer : A gas P is obtained at anode during the electrolysis of brine. The gas P when treated with excess of `NH_3` ... x & y are the molar mass of P and Q.
Description : Mechanism of moisture removal in case of freeze drying of food stuff is by (A) Evaporation (B) Sublimation (C) Dehydration (D) Adsorption
Last Answer : (B) Sublimation
Description : In freeze- drying, water is removed from the product by a. Evaporation b. Sublimation c. Transpiration d. None of these
Last Answer : b. Sublimation
Description : Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine? (A) Na2CO3 (B) NaHCO3 (C) H2 (D) None of these
Last Answer : (C) H2
Description : Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction? (A) Oxidation of Na + ions (B) Oxidation of Cl - ions (C) Reduction of Na + ions (D) Reduction of Cl - ions
Last Answer : (B) Oxidation of Cl - ions
Description : Wet chlorine gas produced during electrolysis of brine is dehydrated by (A) Spraying 66° Be H2SO4 counter current to the flow of the gas (B) Passing it through a bed of diatomaceous earth (C) Passing it through a bed of silica gel (D) None of these
Last Answer : (A) Spraying 66° Be H2SO4 counter current to the flow of the gas
Description : What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell? (A) Cl2 & Na (B) Cl2 & H2 (C) O2 & H2 (D) Cl2 , H2 & NaOH solution
Last Answer : (D) Cl2 , H2 & NaOH solution
Description : Common salt is obtained from sea water by the process of (a) sublimation (b) evaporation (c) crystallisation (d) filtration
Last Answer : Ans:(b)
Description : Electrolysis of aqueous solution of Brine (NaCI) gives
Last Answer : Electrolysis of aqueous solution of Brine (NaCI) gives A. (A)`Cl_2` B. (B) `H_2` C. (C) NaHO D. (D) all of these
Description : Which of the following metals can be obtained from its ore only by electrolysis of a molten salt ? w) cobalt x) chromium y) copper z) sodium
Last Answer : ANSWER: Z -- SODIUM
Description : In the constant rate period of the rate of drying curve for batch drying, (A) Cracks develop on the surface of the solid (B) Rate of drying decreases abruptly (C) Surface evaporation of unbound moisture occurs (D) None of these
Last Answer : (C) Surface evaporation of unbound moisture occurs
Description : Unit operation involved in the prilling of urea is (A) Evaporation (B) Drying (C) Crystallisation (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : During the constant rate period of drying of a solid, (A) Increased air humidity decreases the rate of drying (B) Increasing the air temperature decreases the drying rate (C) Surface evaporation of unbound moisture occurs (D) None of these
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 : __________ is obtained as a by-product in the manufacture of sodium hydroxide using brine. (A) Chlorine (B) Ammonium chloride (C) Sodium carbonate (D) Sodium bi-carbonate
Last Answer : (A) Chlorine
Description : In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at A- 60 to -78°C B- 20 to -30°C C- 30 to -48°C D- 48 to -58°C
Last Answer : - 60 to -78°C
Description : Electrochemical process (electrolysis of fused salt) is empolyed to extract
Last Answer : Electrochemical process (electrolysis of fused salt) is empolyed to extract A. Iron B. Mg C. Na D. Both Na and Mg
Description : Pick out the wrong statement: (A) Reboiler is not used in open steam distillation (B) The separation of solutes of different molecular sizes in a liquid solution by use of a ... is used for calculating theoretical number of plates in a distillation column at normal operating reflux condition
Last Answer : (D) Fenske-Underwood equation is used for calculating theoretical number of plates in a distillation column at normal operating reflux condition
Description : how to make salt water for hatching brine shrimp
Last Answer : Need Answer
Description : What is the solvent in a salt solution like brine?
Last Answer : Water.
Description : What is the solute in a salt solution like brine?
Last Answer : water or solvent water
Description : Brine refers to : (1) Salt water (2) Sweet water (3) Pure water (4) Starch water
Last Answer : (1) Salt water Explanation: Brine is a solution of salt in water. In different contexts, brine may refer to salt solutions ranging from about 3.5% up to about 26%. Other levels of concentration are called in different names.
Description : Which of the following combination of processing and preservation techniques works best for smoked products? A. Salt and acidification B. Heat, salt, dipping in brine/ minimal moisture content C. Heat, salt, acidification/minimal moisture content D. Heat and solid content
Last Answer : B. Heat, salt, dipping in brine/ minimal moisture content
Last Answer : Salt water
Description : Explain the following unit operations: (i) Mixing (ii) Drying (iii) Evaporation (iv) Absorption.
Last Answer : i)Mixing: Mixing is carried out for producing simple mixtures, accomplishing dispersions and promoting chemical reactions. It is a process in which two separate materials such as two different ... ammonia mixture by water 2) Removal of hydrogen sulfide from naturally occurring hydrocarbon gases.
Description : Vacuum is applied in __________ zone, in case of a general type continuous rotary drum vacuum filter. (A) Filtering (B) Washing (C) Drying (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Drying operation under vacuum is carried out to (A) Dry those materials which have very high unbound moisture content (B) Reduce drying temperature (C) Increase drying temperature (D) Dry materials having high bound moisture content
Last Answer : (B) Reduce drying temperature
Description : Drying of refractory is normally carried out in a __________ dryer. (A) Open pan (B) Tray (C) Rotary vacuum (D) Truck/tunnel
Last Answer : (D) Truck/tunnel
Description : Large scale drying of wheat is done in a __________ dryer. (A) Fluidised bed (B) Spouted bed (C) Tray (D) Vacuum rotary
Last Answer : (B) Spouted bed
Description : Vacuum is generally maintained in the vapour space of an evaporator mainly to (A) Get economical temperature difference by using moderate pressure steam (B) Facilitate forward ... (C) Concentrate heat sensitive materials (D) Achieve very high concentration of the final product
Last Answer : (A) Get economical temperature difference by using moderate pressure steam
Description : In case of evaporators, liquid entrainment results primarily due to (A) High vacuum in the evaporator (B) High evaporation rate (C) Foaming of the solution (D) High heat transfer rate
Last Answer : (C) Foaming of the solution
Description : Pick out the wrong statement. (A) The value of hydrostatic head increases with increase in vacuum in the effect in a multiple effect evaporator system (B) Entering velocity of the liquid in ... a multiple effect evaporation system, the number of effects is limited by the total boiling point rise
Last Answer : (C) Duhring's plot is used for calculating the concentration of solution
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 metallic aluminium is obtained from pure alumina in the presence of fused cryolite by (A) Electrolysis (B) Electrolytic reduction (C) Electrolytic oxidation (D) None of these
Last Answer : (B) Electrolytic reduction
Description : Which of the following is bactericidal? A.Membrane filtration B.Ionizing radiation C.Freeze-drying D.Deep freezing
Last Answer : B.Ionizing radiation
Last Answer : onizing radiation
Description : The most common drying method is ____ drying. a. freeze- c. spray b. sun or tray drying d. oven
Last Answer : c. spray
Description : Explain The theory of freeze drying and state its application.
Last Answer : Theory:- i) In this process, the material is frozen in a suitable container connected to a high vacuum system, so that the vapour pressure of water vapours is ... antibiotics, blood products, vaccines, enzymes preparation, microbiological cultures & other thermo labile pharmaceutical substances.
Description : Explain principle of freeze drying. Give its advantages.
Last Answer : Principle: i. The material is frozen in a suitable container connected to a high vacuum system, so that the vapour pressure of water is reduced to less than that of material being dried. ii. ... it is properly sealed in an inert atmosphere. vii. The sterility of the product can be maintained.
Description : Give application of freeze drying.
Last Answer : (i) The process is mainly used for drying of biological products such as antibiotics, blood products, vaccines ,enzymes preparation, microbiological cultures etc. (ii) The heat sensitive material can be dried
Description : Discuss the theory, construction, and working of freeze drying apparatus
Last Answer : Theory: Freeze drying or sublimation drying consists of simply reducing the temperature & pressure to values below the triple point .(4.579mm of Hg& temp. of 0.0099 c) Under these ... . 5. Packing: Biological products are dried packed in aseptic condition immediately after drying.
Description : Discuss in brief Freeze drying.
Last Answer : Principle: The material is frozen in a suitable container connected to a high vacuum system, so that the vapour pressure of water is reduced to less than that of material being dried. Thus, it ... special precautions. 3. The period of drying is quite long.(usually not less than 10 hours)
Description : Large quantity of silica gel is normally dried in a __________ dryer. (A) Freeze (B) Through circulation (C) Rotary vacuum (D) Tray
Last Answer : (B) Through circulation
Description : The electrolysis of the disodium salt of pentanedioc acid gives
Last Answer : The electrolysis of the disodium salt of pentanedioc acid gives A. pentane B. butane C. Cyclopropane D. ethane
Description : What does common salt break into during electrolysis of its solution?
Last Answer : The products of the electrolysis are sodium hydroxide and chlorine.
Description : An aqueous solution of CuSO4 is acidic in nature because the salt undergoes (a) dialysis (b) hydrolysis (c) electrolysis (d) photolysis
Description : _________ is pressurised heating for a short time. a) pasteurisation b)drying c)vacuum packing d)canning
Last Answer : a) pasteurisation