Description : Assertion : Zirconium can be purificed by Van Arkel method. Reason : `ZrI_(4)` is volatile and decomposed at `1800 K`.
Last Answer : Assertion : Zirconium can be purificed by Van Arkel method. Reason : `ZrI_(4)` is volatile and decomposed at `1800 K`.
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 : 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 : One of the following metals froms a volatile corbony1 compound and this property is taken advantage of its extraction. This metal is
Last Answer : One of the following metals froms a volatile corbony1 compound and this property is taken advantage of its ... . Nickel B. Iron C. Cobalt D. Vanadium
Description : Pure water is bad conductor of electricity because it is – (1) feebly ionized (2) not volatile (3) a very good solvent (4) a non-polar solvent
Last Answer : (1) feebly ionized Explanation: Pure water is a covalent compound. It exists as simple discrete molecules and have a simple molecular structure. Hence, it does not exist as ions. Therefore, ... into hydrogen ions and hydroxide ions. The presence of mobile ions enables it to conduct electricity.
Description : Pure water is bad conductor of electricity because it is (1) feebly ionized (2) not volatile (3) a very good solvent (4) a non-polar solvent
Last Answer : feebly ionized
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 : If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than the metal, then the purification of metal may be carried
Last Answer : If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than ... B. electrorefining C. Zone refining D. POILING
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 : Which oil is used in the floatation method for the purification of ores? -General Knowledge
Last Answer : The answer is 'Pine oil'
Description : Purification of petroleum is carried out by which method? -General Knowledge
Last Answer : The answer is 'Fractional distillation'
Last Answer : answer:
Description : Which method of purification is represented by the following equations `Ti +2I_(2) overset(523K)rarr TiI_(4) overset(1700K)rarr Ti +2I_(2)`
Last Answer : Which method of purification is represented by the following equations `Ti +2I_(2) overset(523K)rarr TiI_( ... B. Poling C. Can arkel D. zone refining
Description : (xiv) Following equation represents a method of purification of nickel by `underset ("Impure")(Ni) + 4CO overset (320 K)rarr Ni(CO)_(4) overset(420 K)
Last Answer : (xiv) Following equation represents a method of purification of nickel by `underset ("Impure")(Ni) + ... Arkel B. Zone refining C. Mond D. Cupellation
Description : Dialysis is a method of purification of sols. But prolonged dialysis of the sol makes it unstable. Why ?
Last Answer : Ans. Traces of electrolytes in the sol, impart charge to dispersed phase particles making it stable. Prolonged dialysis removes all electrolytes thus making the sol unstable.
Description : Which oil is used in the floatation method for the purification of ores?
Last Answer : Hole
Description : Pick out the correct statement. (A) If an insoluble gas is passed through a volatile liquid placed in a perfectly insulated container, the temperature of the liquid will increase (B) A ... compound is defined as the heat of reaction leading to the formation of the compound from its reactants
Last Answer : (D) The heat of formation of a compound is defined as the heat of reaction leading to the formation of the compound from its reactants
Description : Pure A in gas phase enters a reactor 50% of this A is converted to Bthrough the reaction, A → 3B. Mole fraction of A in the exit stream is (A) 1/2 (B) 1/3 (C) 1/4 (D) 1/5
Last Answer : (B) 1/3
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 : What mass of NaCl would be decomposed by 98 g of `H_(2)SO_(4)` if 120 g of `NaHSO_(4)` and 27 .5 g of HCl are produced in a reaction. Assuming that la
Last Answer : What mass of NaCl would be decomposed by 98 g of `H_(2)SO_(4)` if 120 g of `NaHSO_(4)` and 27 .5 g of HCl ... .95 g B. 49 .5 g C. 0. 495 g D. 495 h
Description : During the electrolysis of carnallite , `MgCl_(2)` is decomposed and not KCl . This is because of :
Last Answer : During the electrolysis of carnallite , `MgCl_(2)` is decomposed and not KCl . This is because of : A. lower ... both (A) and (B) D. none of the above
Description : What is composed of weathered rocks and decomposed organic material from dead plants and animals?
Last Answer : Need answer
Description : What is a substance that can no longer be decomposed by chemical means?
Description : Is a gorilla a producer consumer or decomposed?
Last Answer : consumer
Description : What character decomposed in the lion king?
Last Answer : What is the answer ?
Description : Is a cardinal a decomposed?
Last Answer : Is a cardinal a decomposer
Description : Is frog a decomposed?
Last Answer : yes
Description : What is the substance that can be decomposed by bacteria action?
Last Answer : What is the total surrounding or all the condition that effectthe life and growth of living things
Description : What is referring to a substance that can be decomposed by bacterial action?
Last Answer : Any substance that can be decomposed by bacterial action is referred to as biodegradable. For example, plastic is not biodegradable but paper is a biodegradable material.
Description : The body protein after eighteen years (A) Remains unchanged (B) Is decomposed only slightly at intervals of one month (C) Is in a constant state of flux (D) Is used only for energy requirement
Last Answer : Answer : C
Description : During glycolysis, Fructose 1, 6 diphosphate is decomposed by the enzyme: (A) Enolase a (B) Fructokinase (C) Aldolase (D) Diphosphofructophosphatose
Last Answer : C
Description : A practice of turning un-decomposed fresh green plant tissue into the soil to improve fertility status and physical structure of the soil.
Last Answer : Ans. Green Manuring
Description : Well decomposed FYM contains N, P and K content
Last Answer : Ans. 0.5:0.2:0.5%
Description : Hydrocarbons are decomposed into smaller hydrocarbons by a) reforming b) refining c) cracking d) polymerization
Last Answer : Answer: c Explanation: Hydrocarbons are decomposed into smaller hydrocarbons by cracking while the molecular structure of the straight-run gasoline is changed by reforming.
Description : Kelp is - (1) Sulphide mineral of iron (2) Partially decomposed vegetalion (3) Sea weed rich in iodine content (4) An aluminium silicate mineral
Last Answer : (3) Sea weed rich in iodine content Explanation: Kelps are large seaweeds (algae) belonging to the brown algae in the order Laminariales. Because of its high concentration of iodine, kelp has been used to treat goiter, an enlargement of the thyroid gland caused by a lack of iodine.
Description : ______ is a by product of sewage treatment and can be decomposed to produce biogas. (1) Sewage (2) Sludge (3) Sewer (4) Scum
Last Answer : (2) Sludge Explanation: Sludge refers to the residual, semi-solid material that is produced as a byproduct during sewage treatment of industrial or municipal wastewater. It can be used to produce biogas through a process called anaerobic digestion or fermentation.
Description : Fresh sewage is generally A. Alkaline B. Acidic C. Highly decomposed D. A source of objectionable odour
Last Answer : ANS: A
Description : A large number of organic compounds can be decomposed by (a) Azotobacter (b) Chemolithotrophs (c) Mycoplasma (d) Pseudomonas.
Last Answer : (b) Chemolithotrophs
Description : Halitosis and a sour taste in the mouth are signs and symptoms associated most directly with a) esophageal diverticula. Because the diverticula may retain decomposed food, halitosis and a sour ... as heartburn, regurgitation, and dysphagia in many patients while at least 50% are asymptomatic.
Last Answer : a) esophageal diverticula. Because the diverticula may retain decomposed food, halitosis and a sour taste in the mouth are frequent complaints.
Description : Shingle is (A) Decomposed laterite (B) Crushed granite (C) Water bound pebbles (D) Air weathered rock
Last Answer : Answer: Option A
Description : ‘Kelp’ is (1) Sulphide mineral of iron (2) Partially decomposed vegetation (3) Sea weed rich in iodine content (4) An aluminium silicate mineral
Last Answer : Sea weed rich in iodine content
Description : _________ is a by product of sewage treatment and can be decomposed to produce biogas (1) Sewage (2) Sludge (3) Sewer (4) Scum
Last Answer : Sludge
Description : (3) prevents freezing of petrol Explanation: Ethylene glycol (IUPAC name: ethane-1,2-diol) is an organic compound widely used as an automotive antifreeze and a precursor to polymers. In its pure form, it is ... A mixture of 60% ethylene glycol and 40% water freezes at -45 degree C (- 49 degree F).
Last Answer : Rust is - (1) A mixture of Fe₂O₃ and Fe(OH) ₂ (2) A mixture of FeO and Fe(OH)₂ (3) FeO only (4) A mixture of Fe₂O₃, 3H₂O and FeO
Description : `3 g` of an oxide of a metal is converted completely to `5 g` chloride. Equivalent weight of metal is:
Last Answer : `3 g` of an oxide of a metal is converted completely to `5 g` chloride. Equivalent weight of metal is: A. 33.25 B. 3.325 C. 12 D. 20
Description : Statement -1 : Ores are generally converted into oxides , prior to reduction . Statement- 2 : Metal oxides can be easily reduced .
Last Answer : Statement -1 : Ores are generally converted into oxides , prior to reduction . Statement- 2 : Metal oxides ... -1 : is false , statement-2 : is true
Description : Thorium can be converted into U-233 in a __________ reactor. (A) Liquid metal cooled (B) Fast breeder (C) Thermal (D) Swimming pool
Last Answer : (B) Fast breeder