Description : (A) Led, tin and bismuth are purified by liquation method. (R ) Lead, tin and bismuth have low m.p. as compared to impuriites.
Last Answer : (A) Led, tin and bismuth are purified by liquation method. (R ) Lead, tin and bismuth have low m.p. as ... D. If (A) is incorrect but (R ) is correct
Description : Which of the following low melting alloy containing bismuth and lead is used for electric fuse? (A) Wood's metal (B) Babbitt metal (C) Monel metal (D) Duralumin
Last Answer : Option A
Description : Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower (A) Price (B) Corrosion resistance (C) Thermal conductivity (D) Abundant availability
Last Answer : (D) Abundant availability
Description : Type metal used in printing press is an alloy of - (1) lead and copper (2) lead and antimony (3) lead and bismuth (4) lead and zinc
Last Answer : (2) lead and antimony Explanation: Lead and antimony are used to make type metals alloy. These type metals are used to make the character produced durable and tough.
Description : Type metal used in printing press is an alloy of – (1) lead and copper (2) lead and antimony (3) lead and bismuth (4) lead and zinc
Last Answer : (2) lead and antimony Explanation: In printing, type metal (sometimes called hot metal) refers to the metal alloys used in traditional type founding and hot metal typesetting. Lead is the main ... make castings with sharp details because molten lead shrinks and sags when it cools to a solid.
Description : Type metal used in printing press is an alloy of (1) lead and copper (2) lead and antimony (3) lead and bismuth (4) lead and zinc
Last Answer : lead and antimony
Description : What is meant by liquation process?
Last Answer : Liquation is a process of obtaining ultra pure metal. It is based on the principle that metals are readily fusible where as the impurities are infusible at the temperature at which the metals fuse.
Description : Silver containing lead as an impurity is not purified by
Last Answer : Silver containing lead as an impurity is not purified by A. Poling B. Distillation C. cupellation D. Levigation
Description : Choose the correct statement about colloidal bismuth subcitrate: A. It causes prolonged neutralization of gastric acid B. It has anti-H.pylori activity C. It relieves peptic ulcer pain promptly D. All of the above are correct
Last Answer : B. It has anti-H.pylori activity
Description : What is the newly formed lead compound in a reaction between lead (IV) sulfate and tin (II) chlorate?
Last Answer : Lead sulfate is not soluble in water.
Description : A colloidal solution can be purified by the following method :
Last Answer : A colloidal solution can be purified by the following method : A. dialysis B. peptization C. filtration D. oxidation
Description : Among the metals Ti,V,W,Zr th and Au the number of metals purified van arkel method are…….
Last Answer : Among the metals Ti,V,W,Zr th and Au the number of metals purified van arkel method are…….
Description : Which of the following pari of metals is purified by VanArkel method
Last Answer : Which of the following pari of metals is purified by VanArkel method A. Ga and In B. Zr and Ti C. Ag and Au D. Ni and Fe
Description : Which of the following can be purified by the electrolytic method? (a) Sodium (Na) (b) Copper (Cu) (c) Boron (B) (d) Chlorine (C12)
Last Answer : Ans:129
Description : By which method aniline can be purified?
Last Answer : By steam distillation.
Description : State the impurities for obtaining p-type and n-type semiconductor from intrinsic semi conductor.
Last Answer : Crystals of Silicon and Germanium are doped using two types of dopants: 1. The impurities for obtaining n-type semiconductor from intrinsic semiconductor are pentavalent impurity; like Arsenic (As), Antimony ... semiconductor are trivalent impurity; like Indium (In), Boron (B), Aluminum (Al), etc.
Description : The degree of dissociation of an electrolyte depends on - (1) dilution (2) impurities (3) atmospheric pressure (4) method of dissolution
Last Answer : (1) dilution Explanation: The extent to which an electrolyte dissociates into ions is known as degree of dissociation or ionization and depends upon the following factors: (1) Nature of the electrolyte, (2) Temperature, (3) Dilution, (4) nature of the solvent, and (e) presence of other ions.
Description : The method of concentrating the ore which makes use of the difference in density between ore and impurities is called?
Last Answer : levigation
Description : The degree of dissociation of an electrolyte depends on (1) dilution (2) impurities (3) atmospheric pressure (4) method of dissolution
Last Answer : dilution
Description : What happens if you place an electric coil around a rod of Bismuth?
Last Answer : It would just get hot, I suppose. You can quite easily melt it and make pretty looking crystallised blocks of the stuff. Here's a good Instructable: http://www.instructables.com/id/Fun-with-Bismuth/ If it ... , but they say it doesn't stick to other metals very well, so it can just be scraped off.
Description : What is the sign of bismuth ?
Last Answer : Bi Bismath's signal
Description : Explain the trend in oxidation state of elements from nitrogen to bismuth.
Last Answer : Explain the trend in oxidation state of elements from nitrogen to bismuth.
Description : Why is bismuth an element?
Last Answer : Because bismuth is a pure substance and its smallest unit is anatom of bismuth.
Description : IN the beta decay of Bismuth-214 what daughter element is produced?
Last Answer : Feel Free to Answer
Description : Bismuth Aurite is the mineral of?
Last Answer : Gold
Description : Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing. (A) Oxygen (B) Arsenic (C) Antimony (D) Bismuth
Last Answer : (D) Bismuth
Description : Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously. (A) Bismuth (B) Arsenic (C) Antimony (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : Of the following categories of medications, which is used in combination with bismuth salts to eradicate Helicobacter pylori? a) Antibiotics Antibiotics and bismuth salts are given to eradicate ... antagonists Histamine-2 receptor antagonists are given to decrease the acid secretion in the stomach.
Last Answer : a) Antibiotics Antibiotics and bismuth salts are given to eradicate H. pylori.
Description : The following is true of anti-H.pylori therapy except: A. It is indicated in all patients of peptic ulcer B. Resistance to any single antimicrobial drug develops rapidly C. Concurrent ... efficacy of the regimen D. Colloidal bismuth directly inhibits H.pylori but has poor patient acceptability
Last Answer : A. It is indicated in all patients of peptic ulcer
Description : ntacids administered concurrently reduce efficacy of the following antipeptic ulcer drug: A. Cimetidine B. Colloidal bismuth C. Sucralfate D. Pirenzepine
Last Answer : C. Sucralfate
Description : Choose the antiulcer drug that inhibits gastric acid secretion, stimulates gastric mucus and bicarbonate secretion and has cytoprotective action on gastric mucosa: A. Misoprostol B. Sucralfate C. Carbenoxolone sodium D. Colloidal bismuth subcitrate
Last Answer : A. Misoprostol
Description : _________ drug is avoided in children’s under 4 years with diarrhea. a) bisacodyl b) loperamide c) Bismuth subsalicylate d) Ciprofloxacin
Last Answer : d) Ciprofloxacin
Description : What is the oxidation number of Bismuth in the compound Bismuth Phosphide?
Last Answer : ANSWER: + 3 (accept 3)
Description : Which of the following is the element represented by the symbol B? w)Barium x)Bismuth y)Boron z)Beryllium
Last Answer : ANSWER: Y -- BORON
Description : Pick out the wrong statement. (A) Tin can be readily and very easily drawn into very fine wire (B) Tin can be severely cold worked without the necessity of annealing due to its low recrystallisation temperature (C) Tin exists in two allotropic forms
Last Answer : (A) Tin can be readily and very easily drawn into very fine wire
Description : Pick out the wrong statement. (A) Linear polymers are formed from bifunctional groups only and are normally thermoplastic (B) Cross-linked branched chain polymers are either elastometric or ... (D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction
Last Answer : D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction
Description : Pick up the correct statement from the following: (A) Roasting is not necessary if iron ore is an oxide (B) Impurities float on the molten iron as slag (C) The slag contains lime about 45% (D) All the above
Last Answer : Answer: Option D
Description : Pick up the correct statement from the following: (A) In basic Bessemer process, the steel heats the converter (B) In open-hearth process, the furnace heats the steel (C) In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore (D) All the above
Description : Pick up the correct statement from the following: (A) Quick lime is obtained by burning pure lime stone (B) Hydraulic lime is obtained by burning lime stone containing clay 5% to 30% (C) Poor lime is obtained by burning lime stone containing impurities more than 5% (D) All the above
Description : What is the ratio of soldering tin lead ?
Last Answer : The ratio of lead to tin is 40 ঃ 60.
Description : Tin and lead can be refined by
Last Answer : Tin and lead can be refined by A. Liquation B. cupellation C. Poling D. Bessemerisation
Description : All example of a mineral occurring as layers in sedimentary rocks is (a) lignite (b) gold (c) lead (d) tin
Last Answer : Ans: (a)
Description : Fuse wire is made of _____? A. 63% lead arid 37% tin B. 63% tin and 37% aluminum C. 63% tin and 37% lead D. 63% lead and 37% aluminum
Last Answer : ANSWER: C
Description : Minamata disease is caused by pollution of water by - (1) lead (2) tin (3) methy isocyanate (4) mercury
Last Answer : (4) mercury Explanation: Minamata disease is a neurological syndrome caused by severe mercury poisoning. The disease was first discovered in Minamata City in Kumamoto prefecture, Japan in 1956. It ... pollution) from the Chisso Corpora-tion's chemical factory, which continued from 1932 to 1968.
Description : Electric fuse is an alloy of – (1) tin and lead (2) zinc and lead (3) copper and iron (4) carbon and tin
Last Answer : (1) tin and lead Explanation: Electric fuse is an alloy of tin and lead.
Description : _____ gives hardness to stainless steel. (1) Zinc (2) Lead (3) Carbon (4) Tin
Last Answer : (3) Carbon Explanation: Iron is alloyed with carbon to make steel and has the effect of increasing the hardness and strength of iron.
Description : Brass is made of – (1) copper and tin (2) tin and lead (3) copper and zinc (4) copper, tin and zinc
Last Answer : (3) copper and zinc Explanation: Brass is an alloy of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties. By Comparison, bronze is principally an alloy of copper and tin.
Description : ______ gives hardness to stainless steel. (1) Zinc (2) Lead (3) Carbon (4) Tin
Last Answer : (3) Carbon Explanation: Iron is alloyed with carbon lo make steel and has the effect of increasing the hardness and strength of iron. Pure iron cannot be hardened or strengthened by heat treatment but ... .3% carbon. The higher the carbon content, the less formable and the tougher the steel becomes.
Description : What is used in storage batteries? (1) Copper (2) Tin (3) Lead (4) Zinc
Last Answer : (3) Lead Explanation: The electrodes of the cells in a storage battery consist of lead grids. The openings of the anodic grid is filled with spongy (porous) lead. The openings of the cathodic grid ... ' storage batteries, can store a lot of charge and provide high current for short periods of time.