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 : Heavy water used in the nuclear reactors to slow down the speed of neutrons is (A) Highly purified water (B) A compound of oxygen and deuterium (C) Water having dissolved salts of heavy metals (D) None of these
Last Answer : (B) A compound of oxygen and deuterium
Description : Ms. Pari, a beginner in SQL is not able to understand the meaning of “Cancelling a Transaction”. Help her in understanding the same. -Technology
Last Answer : Cancelling a transaction means rolls the transaction to the beginning. It aborts any changes made during the transaction and the state of database is returned to what it was before the transaction began to execute.Rollback command is used for the same.
Description : Who is called 'Udan Pari'? -General Knowledge
Last Answer : answer:
Description : Sino sa dalawang pari ang nararapat na maupo sa kabiserapangatiranan?
Last Answer : Feel Free to Answer
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 : Statement-I : Lead, tin and bismuth are purified by liquation method. Statement-II : Lead, tin and bismuth have low m.p as compared to impurities.
Last Answer : Statement-I : Lead, tin and bismuth are purified by liquation method. Statement-II : Lead, tin and bismuth have low m.p as compared to impurities.
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 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 : What is the role of purified linseed oil in oil painting?
Last Answer : It makes the paint flow better. It’s the equivalent of using water with watercolors or acrylics.
Description : Mass spectrometry- how to identify if the mass spectrograph of a purified sample is a certain chemical given main mass components?
Last Answer : I really should know how to do that. I’m glad my AP Chem teacher doesn’t Fluther.
Description : How schools in Nazi Germany were 'cleansed' and 'purified'? -History 9th
Last Answer : 1.Jew teachers were removed. 2. Students were separated on the basis of race. 3. Undesirable kids were later removed from the school and killed. 4. School books were re-written. 5. Students were taught to ... join . The 10 year old had to join ‘Jungvolk' and 14 year old ‘Hitler Youth'.
Description : In which plant phytochrome is isolated and purified? -Biology
Description : Which purified oil does Aviation fuel for jet aeroplanes consist? -General Knowledge
Last Answer : The answer is 'Kerosene'
Description : Sewage water is purified by
Last Answer : Sewage water is purified by A. Microorganisms B. light C. Fishes D. Aquatic plants.
Description : Sewage water can be purified for recycling with action of :
Last Answer : Sewage water can be purified for recycling with action of : A. Aquatic plant B. Micro organism C. Penicillin D. Fishes
Description : Sewage water is purified for recycling by the action of
Last Answer : Sewage water is purified for recycling by the action of A. Light B. Microorganisms C. Aquatic plants D. Fishes
Description : In which of the following the impure metal not purified by the oxidation of impurites
Last Answer : In which of the following the impure metal not purified by the oxidation of impurites A. silver ... iron and cadmium D. bessemerisation of pig iron
Description : `Ti` can be purified by Van Arkel process. `TiI_(4)` is a volatile compound which decomposes at a high temperature.
Last Answer : `Ti` can be purified by Van Arkel process. `TiI_(4)` is a volatile compound which decomposes at a ... D. Statement-1 is false but Statement -2 is true
Description : Cassiterite ore `(SnO_(2))` is purified by
Last Answer : Cassiterite ore `(SnO_(2))` is purified by A. Magnetic separator B. roasting C. leaching D. Calcination
Description : When the sample of copper with the zinc impurity is to be purified by electrolysis, the appropriate electrodes are
Last Answer : When the sample of copper with the zinc impurity is to be purified by electrolysis, the appropriate electrodes ... "),("Pure Zinc","ImPure Zinc"):}`
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 : When the sample of Cu with Zn as impurity is to be purified by electrolysis, the appropriate electrodes are :
Last Answer : When the sample of Cu with Zn as impurity is to be purified by electrolysis, the appropriate electrodes are ... 4)","Impure zinc","Impure sample"):}`
Description : Assertion : Nickel can be purified by Mond process. Reason : `Ni(CO)_(4)` is a volatile compound which deomposed at `460K` to give pure `Ni`.
Last Answer : Assertion : Nickel can be purified by Mond process. Reason : `Ni(CO)_(4)` is a volatile compound which deomposed at `460K` to give pure `Ni`.
Description : In the extraction of aluminium by Hall-Heroult process purified `Al_(2)O_(3)` is mixed with `CaF_(2)` to
Last Answer : In the extraction of aluminium by Hall-Heroult process purified `Al_(2)O_(3)` is mixed with `CaF_(2)` to A ... ^(3+)` into Al(s)` D. acts as catalyst
Description : Sea water can be purified by the process of
Last Answer : Desalination
Description : Which purified oil does Aviation fuel for jet aeroplanes consist?
Last Answer : – Kerosene
Description : The first enzyme isolated, purified and crystallied from Jack bean (Canavalia) by summer in 1926 was (A) Urease (B) Insulin (C) Ribonuclease (D) Zymase
Last Answer : Answer : A
Description : Alkaloids are usually purified by extraction with (A) Ether (B) Dil HCl (C) NaOH (D) Chloroform
Last Answer : Answer : B
Description : Why purified macromolecules are used as vaccines ?
Last Answer : To avoid the risk associated with attenuated and killed whole organism vaccines. 80.Name some purified macromolecules derived from pathogens. They are capsular polysaccharides, inactivated exotoxins and recombinant microbial antigens.
Description : Which of the following cannot be purified by sublimation? (a) Iodine (b) Camphor (c) Citric acid (d) Naphthalene
Last Answer : Ans:(c)
Description : Camphor can easily be purified by the process of (a) Sublimation (b) Distillation (c) Crystallisation (d) Sedimentation
Last Answer : Ans:(a)
Description : Colloids are purified by (a) Peptisation (b) Coagulation (c) Condensation (d) Dialysis
Last Answer : Ans:(d)
Description : (4) Decomposition of manganese dioxide Explanation: One of the two chemical methods starts from natural manganese dioxide and converts it using dinitrogen tetroxide and water to manganese nitrate ... 400°C, the salt decomposes, releasing N2O4 and leaving a residue of purified manganese dioxide.
Last Answer : The mass number of a nucleus is - (1) always less than its atomic number (2) the sum of the number of protons and neutrons present in the nucleus (3) always more than the atomic weight (4) a fraction
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.
Last Answer : Kerosene
Description : How can petroleum be purified?
Last Answer : Fractional distillation
Description : The element which is purified by melt- ing?
Last Answer : Lead
Description : Dust laden air can be purified using a (A) Cyclone separator (B) Bag filter (C) Gravity settler (D) Tubular centrifuge
Last Answer : (A) Cyclone separator
Description : Which of the following is not used as filter aid? (A) Asbestos (B) Diatomaceous earth (C) Purified wood cellulose (D) Rice husk
Last Answer : (D) Rice husk
Description : Which are the two lower chambers of the heart from which purified blood flows out?
Last Answer : Ventricles
Description : What is sublimation? What kind of organic compounds can be purified by this technique?
Last Answer : Process of change of solid substance directly into vapour phase without the intermediate liquid state is called sublimation. This technique is used to separate sublimable compounds.Like camphor ,ammonium chloride.
Description : The haemodialyzer has semi-permeable lining of tubes which help to: (a) To maintain osmotic pressure of blood. (b) To filter nitrogenous wastes from the dialyzing solution. (c) In passing the waste product, in the dialyzing solution. (d) To pump purified blood back into the body of the patient.
Last Answer : (c) In passing the waste product, in the dialyzing solution.
Description : Genetic engineering is possible, because (a) we can cut DNA at specific sites by endonucleases like DNase I (b) restriction endonucleases purified from bacteria can be used in vitro (c) the phenomenon of transduction in bacteria is well understood (d) we can see DNA by electron microscope
Last Answer : (b) restriction endonucleases purified from bacteria can be used in vitro
Description : Biosensers are used as (a) Purified enzymes (b) Antibodies (c) Whole microbial cells (d) Any of the above
Last Answer : (c) Reverse transcriptase
Description : Main constituents of purified Lurgi gas are (A) H2 , CmHn & CO2 (B) CO, H2 & CH4 (C) CO2 , O2 & CO (D) N2 , H2 & CO2
Last Answer : (B) CO, H2 & CH4
Description : Brackish water which contains mostly dissolved salt, can be purified by the __________ process. (A) Reverse osmosis (B) Sand filter (C) Lime soda (D) Permutit
Last Answer : (A) Reverse osmosis