Description : If a metal has low oxygen affinity then the purification of metal may be carried out by :
Last Answer : If a metal has low oxygen affinity then the purification of metal may be carried out by : A. liquation B. distillation C. zone refining D. cupellation
Description : The technique for purification of proteins that can be made specific for a given protein is (A) Gel filtration chromotography (B) Ion exchange chromatography (C) Electrophoresis (D) Affinity chromatography
Last Answer : Answer : D
Description : Carbon monoxide has how much greater affinity for haemoglobin as compared to oxygen? -Do You Know?
Last Answer : answer:
Description : Carbon monoxide has greater affinity for haemoglobin as compared to oxygen :
Last Answer : Carbon monoxide has greater affinity for haemoglobin as compared to oxygen : A. 1000 Times B. 200 Times C. 20Times D. 2 Times
Description : In children the lungs are pale pink due to (a) Rich blood supply (b) Greater binding affinity of haemoglobin for oxygen (c) Formation of a higher percentage of oxyhaemoglobin as per higher metabolic rate (d) All of them
Last Answer : Ans:(a)
Description : Carbon monoxide has how much greater affinity for haemoglobin as compared to oxygen?
Last Answer : 200 times
Description : The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen approximately by (a) 200 times (b) 1000 times (c) 2 times (d) 20 times.
Last Answer : (a) 200 times
Description : Regarding the recently introduced lipid formulation of amphotericin B, which one of the following statements is accurate? (a) Affinity of amphotericin B for these lipids is greater than ... (e) They have wider spectrums of antifungal activity than conventional formulations of amphotericin B
Last Answer : Ans: D
Description : Purification of petroleum is carried out by which method? -General Knowledge
Last Answer : The answer is 'Fractional distillation'
Description : 54 Pick up the correct statement from the following: A. The ratio of the quantity of the diluting water to that of the sewage, is known as dilution factor B. The automatic purification of polluted ... phenomenon C. The photosynthesis is carried out in the presence of sun light D. All the above
Last Answer : ANS: D
Description : The re-isolation and purification of penicillin was carried out by a. Waksman. b. Florey and Chain. c. Domagk. d. Fleming.
Last Answer : b. Florey and Chain.
Description : Silver halides are used in photographic plates because they are (a) Oxidised in air (b) Colourless (c) Easily soluble in a hypo solution (d) Readily reduced by light
Last Answer : Ans:(d)
Description : Why Ce+3 Can be easily Oxidised to Ce+4 ?
Last Answer : Ans : It is because Ce+4 has stable electronic configuration .
Description : A metal contains, metal oxide as impurity. The method used to refine this metal is
Last Answer : A metal contains, metal oxide as impurity. The method used to refine this metal is A. Poling B. Liqation C. Cupellation D. Distallation
Description : By increasing impurity content in the metal alloy the residual resistivity always
Last Answer : By increasing impurity content in the metal alloy the residual resistivity always increases.
Description : (i) Substances oxidised is Na as it gains oxygen and oxygen is reduced. (ii) Substances reduced is Cu as hydrogen is oxidised as it gains oxygen. -Chemistry-10
Last Answer : During this reaction, the sodium is gaining oxygen and is being oxidized. Oxygen is getting reduced. During this reaction, copper oxide is losing oxygen and is being reduced. The hydrogen is gaining oxygen and is being oxidized.
Description : To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of A. Hydrochloric acid B. Sulphuric acid C. Nitric acid D. Citric acid
Last Answer : ANS: B
Description : What happens when a substance loses oxygen during reaction? It is said to be (a) Oxidised (b) Reduced (c) Both (d) None of the above
Last Answer : (b) Reduced
Description : What happens when a substance gains oxygen during reaction? The substance gets – (a) Oxidised (b) Reduced (c) Both oxidized and reduced (d) None of the above
Last Answer : (a) Oxidised
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
Last Answer : Answer: Option D
Description : If the equivalent mass of a metal is double that of oxygen then the weight of its oxide is ___ times greater than the weight of the metal.
Last Answer : If the equivalent mass of a metal is double that of oxygen then the weight of its oxide is ___ times greater than the ... A. 1.5 B. 2 C. 0.5 D. 3
Description : The factor responsible for purification of sewage in river is A. Hydrology B. Dissolved oxygen in water C. Temperature D. All the above
Description : Stirred-tank bioreactors have been designed for (a) addition of preservatives to the product (b) purification of the product (c) ensuring anaerobic conditions in the culture vessel (d) availability of oxygen throughout the process.
Last Answer : (d) availability of oxygen throughout the process.
Description : Stirred-tank bioreactors have been designed for (a) purification of product (b) addition of preservatives to the product (c) availability of oxygen throughout the process (d) ensuring anaerobic conditions in the culture vessel.
Last Answer : (c) availability of oxygen throughout the process
Description : Lagoons used for purification of polluted water (A) Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds (B) Use micro-organisms/bacteria in presence of dissolved oxygen (C) Gives an ... 1 mg/litre and BOD = 3.8 mg/litre (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Reverse osmosis is normally used for the (A) Separation of isotopes of uranium from gaseous uranium hexafluoride (B) Separation of helium from natural gas (C) Desalination of brackish water to produce potable (drinking) water (D) Purification of oxygen
Last Answer : (C) Desalination of brackish water to produce potable (drinking) water
Description : Presence of carbonaceous matter in the sewage (A) Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures (B) Reduces sulphate ions to sulphides causing obnoxious ... quantity of chlorine used for its purification (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Assertion `:-` Haemoglobin can not get saturated with oxygen more than `97%`. Reason `:-` With a rise in `PO_(2)`, the affinity between `O_(2)` & haem
Last Answer : Assertion `:-` Haemoglobin can not get saturated with oxygen more than `97%`. Reason `:-` With a ... False. D. If both Assertion & Reason are false.
Description : Van Arkel method of purification of metals involves converting the metal to
Last Answer : Van Arkel method of purification of metals involves converting the metal to A. Volatile ... stable compound D. non-volatile unstable compound
Last Answer : Van Arkel method of purification of metals involves converting the metal to A. Volatile stable ... . Volatile unstable compound D. None of these
Description : In which of the following method of purification metal is converted to its volatile compound which is decomposed to give pure metal?
Last Answer : In which of the following method of purification metal is converted to its volatile compound ... Heating with iodine C. Liquidation D. Distillation
Description : Ultra purification of a metal is done by (1) slugging (2) zone melting (3) smelting (4) leaching
Last Answer : (2) zone melting Explanation: When metals are required in a ultra pure state, the zone refining method is used. The principleemployed states that the impurities, which lower the melting point of ... remain preferentially dissolved in the liquid phase and purer metal will emerge in the solid phase.
Description : Ultra purification of a Metal is done by–
Last Answer : Zone Melting
Description : Ultra purification of a metal is done by : (1) slugging (2) zone melting (3) smelting (4) leaching
Last Answer : zone melting
Description : Statement -1 `Al_(2)O_(3)` is converted in to Al by reductin with carbon at high temp.statement -2: Carbon has grater affinity for oxygen than alumium
Last Answer : Statement -1 `Al_(2)O_(3)` is converted in to Al by reductin with carbon at high temp. ... -2: Carbon has grater affinity for oxygen than alumium .
Description : The haemoglobin of a human fetus (a) has only 2 protein subunits instead of 4 (b) has a higher affinity for oxygen than that of an adult (c) has a lower affinity for oxygen than that of the adult (d) its affinity for oxygen is the same as that of an adult.
Last Answer : (b) has a higher affinity for oxygen than that of an adult
Description : Assertion `:-` Low concentration of oxygen allow dissociation of oxyhaemoglobin. Reason `:-` CO has more affinity with Haemoglobin as compares to oxyg
Last Answer : Assertion `:-` Low concentration of oxygen allow dissociation of oxyhaemoglobin. Reason `:-` CO has more ... D. If both Assertion & Reason are false.
Description : Water may not contain much impurity if its source is (A) Reservoirs (B) Stream flowing in plains (C) Lakes in lower regions (D) Spring along hill slopes
Last Answer : (D) Spring along hill slopes
Description : For which substrate `RuBisCO` shows greater affinity?
Last Answer : For which substrate `RuBisCO` shows greater affinity?
Description : When a sample of germanium and silicon having same impurity density are kept at room temperature then Resistivity of silicon will be higher than that of germanium, Why?
Last Answer : Ans-The answer is simple. Consider the PN diode for Ge 0.3eV is the breakdown voltage and in the case of Si its 0.7eV since the impurities are added in the same amount the bond due to the other atoms of the Si makes it resistive compared to the Ge.. thats all!
Description : Go through the following graph and answer the following questions. At what approximate temperature, zinc and carbon have equal affinity for oxygen.
Last Answer : Go through the following graph and answer the following questions. At what approximate temperature, zinc and carbon have ... 500^(@)C` D. `1200^(@)C`
Description : 2, 3-Biphosphoglycerate in high concentrations, combines with hemoglobin, causes (A) Displacement of the oxyhemoglobin dissociation curve to the left (B) Displacement of the oxyhemoglobin dissociation curve ... (C) No change in oxy hemoglobin dissociation curve (D) Increased affinity for oxygen
Last Answer : Answer : B
Description : Haemoglobin has highest affinity for – (1) Oxygen (2) Carbon dioxide (3) Carbon monoxide (4) Nitrogen
Last Answer : (1) Oxygen Explanation: Haemoglobin has greatest affinity for oxygen with which it binds readily. The oxygen binding properties of hemoglobin exist because of the interaction between oxygen and the iron atom of the heme groups and hemoglobin's quaternary structure.
Description : Reduction in pH of blood will (a) decrease the affinity of haemoglobin with oxygen (b) release bicarbonate ions by the liver (c) reduce the rate of heartbeat (d) reduce the blood supply to the brain.
Last Answer : (a) decrease the affinity of haemoglobin with oxygen
Description : Roots of which plant contains a red pigment which have affinity for oxygen? (a) Carrot (b) Soybean (c) Mustard (d) Radish
Last Answer : (b) Soybean
Description : Metronidazole is selectively active against anaerobic organisms because: A. Aerobes have an active transport mechanism to pump it out of their cell B. Only anaerobes reduce it to generate the reactive ... inactivated in the presence of oxygen D. It binds to DNA of anaerobes with high affinity
Last Answer : B. Only anaerobes reduce it to generate the reactive nitro radical
Description : List the following atoms in order of increasing electron affinity: oxygen, boron, and fluorine.
Last Answer : ANSWER: (1) BORON, (2) OXYGEN, (3) FLUORINE
Description : Haemoglobin has highest affinity for (1) Oxygen (2) Carbon dioxide (3) Carbon monoxide (4) Nitrogen
Last Answer : Oxygen