The liquid used in the Wohlwill process for extracting pure gold?

The liquid used in the Wohlwill process
for extracting pure gold?
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Aquaregia
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Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when (A) Extracting solvent is cheaply & abundantly available (B) One of the liquid components is heat sensitive (C) Viscosity of liquid components is very high (D) One of the liquid components has very high affinity towards the solvent

Description : Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when (A) Extracting solvent is cheaply & abundantly available ... very high (D) One of the liquid components has very high affinity towards the solvent

Last Answer : (D) One of the liquid components has very high affinity towards the solvent

What is the process of extracting ore?

Description : What is the process of extracting ore?

Last Answer : What is the answer ?

Which process is generally used in extracting magnesium in metallurgy?

Description : Which process is generally used in extracting magnesium in metallurgy?

Last Answer : Fused salt electrolysis is generally used in extracting magnesium in Metallurgy. In the extraction of metal, magnesium is usually extracted by the electrolysis of fused anhydrous MgCl2 because of its reactive nature. Another process uses silicon to reduce magnesium oxide.

Extracting method of metal is known as?

Description : Extracting method of metal is known as?

Last Answer : Metallurgy

Can one make a profit from extracting palladium and platinum from automobiles in junk yards?

Description : Can one make a profit from extracting palladium and platinum from automobiles in junk yards?

Last Answer : It’s the recyclers who do that and make money. You couldn’t make enough trying to do it yourself.

Is there a generalized method for extracting pigments from organic matter?

Description : Is there a generalized method for extracting pigments from organic matter?

Last Answer : Painters using traditional methods (and back in the day) tend to use a mortar and pestle to crush things in order to extract the pigment, in addition to adding other paint ingredients. Crushing things ... are then incorporated into the other matter, lending the color, is one method for doing this.

Who invented the technique of extracting scent from Rose? -Do You Know?

Description : Who invented the technique of extracting scent from Rose? -Do You Know?

Last Answer : answer:

Do you know a good program for extracting files?

Description : I have windows 8.Thanks.

Last Answer : 7Zip .... http://www.7-zip.org/ but also on the file package ... It doesn't have the best compression ratio .. Paid programs .... ☢ ☠ ☣ ☠ ☣ ☠ ☣ ☠ ☢

Silver is displaced when zinc is added to aqueous sodium argento cyanideThis method of extracting silver is an example for

Description : Silver is displaced when zinc is added to aqueous sodium argento cyanideThis method of extracting silver is an example for

Last Answer : Silver is displaced when zinc is added to aqueous sodium argento cyanideThis method of extracting ... Hydro metallurgy C. Pyrometallurgy D. Liquition

The residue left after extracting juice from sugar beet and sugarcane is called – (1) molasses (2) bagasse (3) whey (4) biomass

Description : The residue left after extracting juice from sugar beet and sugarcane is called – (1) molasses (2) bagasse (3) whey (4) biomass

Last Answer : (2) bagasse Explanation: Bagasse is the fibrous matter that remains after sugarcane or sorghum stalks are crushed to extract their juice. It is currently used as a biofuel and in the manufacture of ... , the quantity of production in each country is in line with the quantity of sugarcane produced.

Who invented the technique of extracting scent from Rose?

Description : Who invented the technique of extracting scent from Rose?

Last Answer : Nurjahan

A knowledge engineer has the job of extracting knowledge from an expert and building the expert system knowledge base. a) True b) False

Description : A knowledge engineer has the job of extracting knowledge from an expert and building the expert system knowledge base. a) True b) False

Last Answer : a) True

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP? (a) Ribosome (b) Chloroplast (c) Mitochondrion (d) Lysosome

Description : Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP? (a) Ribosome (b) Chloroplast (c) Mitochondrion (d) Lysosome

Last Answer : (c) Mitochondrion

Point out the correct statement. a) Hadoop is an ideal environment for extracting and transforming small volumes of data b) Hadoop stores data in HDFS and supports data compression/decompression c) The Giraph framework is less useful than a MapReduce job to solve graph and machine learning d) None of the mentioned

Description : Point out the correct statement. a) Hadoop is an ideal environment for extracting and transforming small volumes of data b) Hadoop stores data in HDFS and supports data compression/decompression c) The ... less useful than a MapReduce job to solve graph and machine learning d) None of the mentioned

Last Answer : Hadoop stores data in HDFS and supports data compression/decompression

Point out the correct statement. a) Hadoop is an ideal environment for extracting and transforming small volumes of data b) Hadoop stores data in HDFS and supports data compression/decompression c) The Giraph framework is less useful than a MapReduce job to solve graph and machine learning d) None of the mentioned

Description : Point out the correct statement. a) Hadoop is an ideal environment for extracting and transforming small volumes of data b) Hadoop stores data in HDFS and supports data compression/decompression c) The ... useful than a MapReduce job to solve graph and machine learning d) None of the mentioned

Last Answer : Hadoop stores data in HDFS and supports data compression/decompression

Point out the correct statement. a) Hadoop is an ideal environment for extracting and transforming small volumes of data b) Hadoop stores data in HDFS and supports data compression/decompression c) The Giraph framework is less useful than a MapReduce job to solve graph and machine learning d) None of the mentioned

Description : Point out the correct statement. a) Hadoop is an ideal environment for extracting and transforming small volumes of data b) Hadoop stores data in HDFS and supports data compression/decompression c) The ... useful than a MapReduce job to solve graph and machine learning d) None of the mentioned

Last Answer : Hadoop stores data in HDFS and supports data compression/decompression

Enumerate the effects or impact of mining on the environment. Or State the environmental effects of extracting & using mineral resources.

Description : Enumerate the effects or impact of mining on the environment. Or State the environmental effects of extracting & using mineral resources.

Last Answer : ⮚ Devegetation and Defacing of Landscape ⮚ Subsidence of Land ⮚ Ground water Contamination ⮚ Surface water Pollution ⮚ Air Pollution ⮚ Occupational Health Hazards

A palatal root displaced into the antrum while extracting; what is your decision to retrieve it: A. Through the alveolar B. Surgical opening of canine fossa C. Nasal antrostomy

Description : A palatal root displaced into the antrum while extracting; what is your decision to retrieve it: A. Through the alveolar B. Surgical opening of canine fossa C. Nasal antrostomy

Last Answer : B. Surgical opening of canine fossa

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP ? (1) Ribosome (2) Chloroplast (3) Mitochondrion (4) Lysosome

Description : Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP ? (1) Ribosome (2) Chloroplast (3) Mitochondrion (4) Lysosome

Last Answer : (3) Mitochondrion

The residue left after extracting juice from sugarbeet and sugarcane is called (1) molasses (2) bagasse (3) whey (4) biomass

Description : The residue left after extracting juice from sugarbeet and sugarcane is called (1) molasses (2) bagasse (3) whey (4) biomass

Last Answer : bagasse

Pick out the wrong statement (A) Co-current absorbers are usually used, when the gas to be dissolved in the liquid is a pure substance (B) In case of gas absorption, HETP is equal to HTU, when both the operating line & the equilibrium lines are parallel (C) Hatta number is important in case of gas absorption with chemical reaction (D) In actual practice, absorption is an endothermic process, while stripping is an exothermic process

Description : Pick out the wrong statement (A) Co-current absorbers are usually used, when the gas to be dissolved in the liquid is a pure substance (B) In case of gas absorption, HETP is ... reaction (D) In actual practice, absorption is an endothermic process, while stripping is an exothermic process

Last Answer : (D) In actual practice, absorption is an endothermic process, while stripping is an exothermic process

The ratio of pure gold in 18 carat gold is --------? A. 0.5 B. 0.9 C. 0.8.5 D. 0.75 (Answer)

Description : The ratio of pure gold in 18 carat gold is --------? A. 0.5 B. 0.9 C. 0.8.5 D. 0.75 (Answer)

Last Answer : D. 0.75 (Answer)

What would the cost be if an Illuminati-type figure arose out of nowhere -- and commissioned a gigantic Gothic Cathedral be built out of pure gold (see details)

Description : What would the cost be if an Illuminati-type figure arose out of nowhere -- and commissioned a gigantic Gothic Cathedral be built out of pure gold (see details)

Last Answer : As an example, you could try to replicate the Kölner Dom as a pure gold structure. The building has an estimated mass of about 300000t, and is mostly built with Trachyte, which has a density of 2. ... kg, or 47.000.000€/t. The material costs for your gold cathedral therefore is about 98 trillion €.

Is there a way to buy small amounts of pure gold for its exact value?

Description : Is there a way to buy small amounts of pure gold for its exact value?

Last Answer : Buying in sub-ounce quantities triggers a premium to the bullion price. Your best bet is to buy smaller gold coins in non-collector condition. My personal holdings are in British, Swiss, South African and ... gold I bought at less that $250 an ounce, shows what the confidence in the dollar is now

What is pure gold nutrition?

Description : What is its quality?

Last Answer : Good quality. The old biotech us brigade is doing it! They also love quality, so it is definitely good!

Is 14k Gold Diamond-Cut Hoop Earrings made with pure gold?

Description : Is 14k Gold Diamond-Cut Hoop Earrings made with pure gold?

Last Answer : The 14k Gold Diamond-Cut Hoop Earrings are made with 14k gold, which is a type of gold created for additional strength. It contains pure gold mixed into an alloy so that the earrings can be worn without fear of damage or deformation.

The ratio of Pure gold and 18 carot gold is – (1) 60% (2) 75% (3) 80% (4) 100%

Description : The ratio of Pure gold and 18 carot gold is – (1) 60% (2) 75% (3) 80% (4) 100%

Last Answer : (2) 75% Explanation: 24-karat gold is pure (while 100% purity is unattainable, this designation is permitted in commerce for 99.95% purity), 18- karat gold is 18 parts gold, 6 parts another metal (forming an alloy with 75% gold).

The ratio of pure gold in 18 carat gold is - (1) 100% (2) 80% (3) 75% (4) 60%

Description : The ratio of pure gold in 18 carat gold is - (1) 100% (2) 80% (3) 75% (4) 60%

Last Answer : (3) 75% Explanation: The gold content of alloys is measured in carats (k). Pure gold is designated as 24k where the ratio of pure gold is supposed to be 100 per cent. So 18 k gold will have pure gold ratio of 75 per cent.

The ratio of pure gold in 18 carat gold is (1) 60% (2) 75% (3) 80% (4) 90%

Description : The ratio of pure gold in 18 carat gold is (1) 60% (2) 75% (3) 80% (4) 90%

Last Answer : (2) 75% Explanation: There are various grades of gold purity, determined by the ratio of their alloy composition and rated by a karat system. Typical karat purities range from 10 karats to ... balance between gold purity and strength. Brilliance offers a variety of exquisite 18 karat gold jewelry.

The ratio of pure gold in 18 carat gold is

Description : The ratio of pure gold in 18 carat gold is

Last Answer : 75%

Pick out the wrong statement. (A) Pure rubber is as useless as pure gold as a material of construction (B) Thermal conductivity of aluminium is higher than that of copper; henceit is increasingly used for utensil making(C) Copper has poor weldability(D) Reinforced plastics are made from both thermoplastic as well asthermosetting plastics

Description : Pick out the wrong statement. (A) Pure rubber is as useless as pure gold as a material of construction (B) Thermal conductivity of aluminium is higher than that of copper; henceit is ... has poor weldability (D) Reinforced plastics are made from both thermoplastic as well as thermosetting plastics

Last Answer : (B) Thermal conductivity of aluminium is higher than that of copper; henceit is increasingly used for utensil making

Indian post gold coin denomination is a) 0.2 g, 2g, 5 g and 8 g of 24 carat (99.99% pure) a) 1 g, 2g, 6 g and 10 g of 24 carat (99.99% pure) a) 0.5 g, 1g, 5 g and 8 g of 24 carat (99.99% pure) a) None of these

Description : Indian post gold coin denomination is a) 0.2 g, 2g, 5 g and 8 g of 24 carat (99.99% pure) a) 1 g, 2g, 6 g and 10 g of 24 carat (99.99% pure) a) 0.5 g, 1g, 5 g and 8 g of 24 carat (99.99% pure) a) None of these

Last Answer : a) 0.5 g, 1g, 5 g and 8 g of 24 carat (99.99% pure)

“Pop off” of a porcelain veneer from the under the lying gold crown is due to:** A. Too thick application of pure gold surface conditioner B. Contamination at the porcelain metal interface C. Under firing the opaque layer D. All of the above

Description : “Pop off” of a porcelain veneer from the under the lying gold crown is due to:** A. Too thick application of pure gold surface conditioner B. Contamination at the porcelain metal interface C. Under firing the opaque layer D. All of the above

Last Answer : B. Contamination at the porcelain metal interface

The ratio of pure gold in 18 carat gold is : (1) 60% (2) 75% (3) 80% (4) 90%

Description : The ratio of pure gold in 18 carat gold is : (1) 60% (2) 75% (3) 80% (4) 90%

Last Answer : 75%

Is liquid air a mixture or a pure substance?

Description : Is liquid air a mixture or a pure substance?

Last Answer : Liquid air is a mixture.

(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 an odorless, colourless, syrupy, sweettasting liquid. Ethylene glycol is toxic, and ingestion can result in death. Due to its low freezing point ethylene glycol resists freezing. A mixture of 60% ethylene glycol and 40% water freezes at -45 degree C (- 49 degree F).

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

Glass is a – (1) pure solid (2) supercooled liquid (3) gel (4) polymer

Description : Glass is a – (1) pure solid (2) supercooled liquid (3) gel (4) polymer

Last Answer : (2) supercooled liquid Explanation: Glass is an amorphous (noncrystalline) solid material. Glasses are typically brittle and optically transparent. The standard definition of a glass (or vitreous solid ... is often used to describe any amorphous solid that exhibits a glass transition temperature Tg.

Sides of equilateral-triangular co-ordinates (on which ternary liquid system is plotted) represent (A) A pure component (B) A binary mixture (C) A ternary mixture (D) Partially miscible ternary system

Description : Sides of equilateral-triangular co-ordinates (on which ternary liquid system is plotted) represent (A) A pure component (B) A binary mixture (C) A ternary mixture (D) Partially miscible ternary system

Last Answer : (B) A binary mixture

Moisture in a substance exerting an equilibrium vapour pressure less than that of pure liquid at the same temperature is called the __________ moisture. (A) Bound (B) Unbound (C) Critical (D) None of these

Description : Moisture in a substance exerting an equilibrium vapour pressure less than that of pure liquid at the same temperature is called the __________ moisture. (A) Bound (B) Unbound (C) Critical (D) None of these

Last Answer : (A) Bound

Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature. (A) Less than (B) More than (C) Equal to (D) Either (A) or (B); depends on the solid

Description : Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature. (A) Less than (B) More than (C) Equal to (D) Either (A) or (B); depends on the solid

Last Answer : (A) Less than

Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture. (A) Unbound (B) Critical (C) Free (D) Bound

Description : Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture. (A) Unbound (B) Critical (C) Free (D) Bound

Last Answer : (A) Unbound

Co-current absorbers are usually used when the gas to be dissolved in the liquid is (A) Sparingly soluble (B) Highly soluble (C) A pure substance (D) A mixture

Description : Co-current absorbers are usually used when the gas to be dissolved in the liquid is (A) Sparingly soluble (B) Highly soluble (C) A pure substance (D) A mixture

Last Answer : (C) A pure substance

When the gas to be dissolved in liquid is a/an __________ then normally co-current adsorber are used. (A) Mixture of two gases (B) Pure gas (C) Ideal gas (D) Sparingly soluble gas

Description : When the gas to be dissolved in liquid is a/an __________ then normally co-current adsorber are used. (A) Mixture of two gases (B) Pure gas (C) Ideal gas (D) Sparingly soluble gas

Last Answer : (B) Pure gas

Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is (A) Insoluble in the liquid (B) Soluble in the liquid (C) Non-ideal in nature (D) At a fixed temperature

Description : Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is (A) Insoluble in the liquid (B) Soluble in the liquid (C) Non-ideal in nature (D) At a fixed temperature

Last Answer : (A) Insoluble in the liquid

Pick out the wrong statement. (A) The controlling resistance in case of heating of air by condensing steam is in the air film (B) The log mean temperature difference (LMTD) for counter flow and parallel flow can be theoretically same when any one of the fluids (hot or cold fluid) passes through the heat exchanger at constant temperature (C) In case of a 1 - 2 shell and tube heat exchanger, the LMTD correction factor value increases sharply, when a temperature cross occurs (D) Phase change in case of a pure fluid at a given pressure from liquid to vapor or vice-versa occurs at saturation temperature

Description : Pick out the wrong statement. (A) The controlling resistance in case of heating of air by condensing steam is in the air film (B) The log mean temperature difference (LMTD) for ... a pure fluid at a given pressure from liquid to vapor or vice-versa occurs at saturation temperature

Last Answer : (C) In case of a 1 - 2 shell and tube heat exchanger, the LMTD correction factor value increases sharply, when a temperature cross occurs

In case of staged packed bed reactors carrying out exothermic reaction, use (A) High recycle for pure gas (B) Plug flow for dilute liquid requiring no large preheating of feed (C) Cold shot operations for a dilute solution requiring large preheating to bring the stream upto the reaction temperature (D) All (A), (B) and (C)

Description : In case of staged packed bed reactors carrying out exothermic reaction, use (A) High recycle for pure gas (B) Plug flow for dilute liquid requiring no large preheating of feed (C) Cold shot operations for a ... preheating to bring the stream upto the reaction temperature (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n octane into pure compounds each at 1 atm is (A) -2 RT ln 0.5 (B) -RT ln 0.5 (C) 0.5 RT (D) 2 RT

Description : The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n octane into pure compounds each at 1 atm is (A) -2 RT ln 0.5 (B) -RT ln 0.5 (C) 0.5 RT (D) 2 RT

Last Answer : (B) -RT ln 0.5

The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are: (A) 1 (B) 2 (C) 3 (D) 0

Description : The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are: (A) 1 (B) 2 (C) 3 (D) 0

Last Answer : (B) 2

A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is φi yi P = Yi xifi° where, Φ is a vapor fugacity component, Yiis the liquid activity co-efficient and fi° is the fugacity of the pure component i. the Ki value (Yi = Ki xi) is therefore, in general a function of (A) Temperature only (B) Temperature and pressure only (C) Temperature, pressure and liquid composition xi only (D) Temperature, pressure, liquid composition xi and vapour composition yi

Description : A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is φi yi P = Yi xifi° where, Φ is a vapor fugacity component, Yiis the liquid activity co- ... and liquid composition xi only (D) Temperature, pressure, liquid composition xi and vapour composition yi

Last Answer : (C) Temperature, pressure and liquid composition xi only