During preparation of amorphous silicon, product is washed with

During preparation of amorphous silicon, product is washed with
by

1 Answer

Answer :

dilute hydrochloric

acid to dissolve magnesium oxide.
by

Related questions

During preparation of amorphous silicon, the product is washed with hydrofluoric acid to

Description : During preparation of amorphous silicon, the product is washed with hydrofluoric acid to

Last Answer : remove unreacted silica.

Amorphous silicon is obtained by heating silica with

Description : Amorphous silicon is obtained by heating silica with

Last Answer : magnesium powder.

What happens when amorphous silicon is heated?

Description : What happens when amorphous silicon is heated?

Last Answer : When amorphous silicon is heated in air, it oxidizes at the surface level & catches fire.

Compare the properties of amorphous and crystalline silicon

Description : Compare the properties of amorphous and crystalline silicon

Last Answer : morphous silicon It is a brown powder It does not conduct electricity at low temperatures. It is more reactive than crystalline silicon When heated in air, it oxidizes at the surface level ... electricity It is less reactive than amorphous silicon It does not burn in air even when heated

What is the role of the following in the extraction of amorphous silicon? a) Hydrochloric acid b) hydrofluoric acid

Description : What is the role of the following in the extraction of amorphous silicon? a) Hydrochloric acid b) hydrofluoric acid

Last Answer : a) Hydrochloric acid is used to dissolve magnesium oxide b) Hydrofluoric acid is used to remove unreacted silica

Briefly explain the extraction of amorphous silicon.

Description : Briefly explain the extraction of amorphous silicon.

Last Answer : Finely powdered silica (sand or quartz) is mixed with magnesium powder and heated in a fire clay crucible. Magnesium oxide and silicon are formed

State the application of following materials : i) CRGO Silicon Steel ii) HRGO Silicon Steel iii) Amorphous metal iv) Bronze

Description : State the application of following materials : i) CRGO Silicon Steel ii) HRGO Silicon Steel iii) Amorphous metal iv) Bronze 

Last Answer : Applications of CRGO Silicon Steel: 1) Manufacturing distribution and power transformer cores. 2) Manufacturing cores of audio transformers, ballast transformers, specialty transformers. 3) Manufacturing cores ... used. 5) Cadmium bronze is used for making commutator segments and contact wires. 

Surface preparation for Metallising the abrasives used for final cleaning is a) Chilled iron grit G.24, as defined in BS : 2451 b) Washed salt free angular silica sand of mesh size 12 to 30 with a minimum of 40% retained on a 20 mesh c) either (a) or (b) * d) d) neither (a) or (b)

Description : Surface preparation for Metallising the abrasives used for final cleaning is a) Chilled iron grit G.24, as defined in BS : 2451 b) Washed salt free angular silica sand of mesh size 12 to 30 with a minimum of 40% retained on a 20 mesh c) either (a) or (b) * d) d) neither (a) or (b)

Last Answer : c) either (a) or (b) *

The compound of silicon used in preparation of glass is

Description : The compound of silicon used in preparation of glass is

Last Answer : sand.

Describe the preparation of a silicon substrate

Description : Describe the preparation of a silicon substrate

Last Answer : Crystal is sliced into wafers. Then ground and polished to remove any surface defect.

What are the various Silicon wafer Preparation? _

Description : What are the various Silicon wafer Preparation? _

Last Answer : Crystal growth & doping _ Ingot trimming & grinding _ Ingot slicing _ Wafer polishing & etching _ Wafer cleaning.

In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called __________ is produced. (A) Concentrate (B) Tailing (C) Middling (D) None of these

Description : In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called __________ is produced. (A) Concentrate (B) Tailing (C) Middling (D) None of these

Last Answer : (C) Middling

What happens if the solution in the conical flask gets washed with distilled water during the experiment?

Description : What happens if the solution in the conical flask gets washed with distilled water during the experiment?

Last Answer : That will depend on what the solution is, as well as many otherpossible conditions what you failed to specify in yourquestion.

Charcoal is (a) Amorphous (b) Crystalline (c) Hygroscopic (d) None of these

Description : Charcoal is (a) Amorphous (b) Crystalline (c) Hygroscopic (d) None of these

Last Answer : Ans:(a)

Diamond is the form of carbon that is (a) Crystalline (b) Amorphous (c) Chemical (d) Alkaline

Description : Diamond is the form of carbon that is (a) Crystalline (b) Amorphous (c) Chemical (d) Alkaline

Last Answer : Ans:(a)

A ligament is (a) A fibrous tissue that joins the muscle to bone (b) A type of amorphous gel that cements non movable joints together (c) A type of fibrous connective tissue that joins bones together at joints (d) Only formed to repair damaged muscle tissue

Description : A ligament is (a) A fibrous tissue that joins the muscle to bone (b) A type of amorphous gel that cements non movable joints together (c) A type of fibrous connective tissue that joins bones together at joints (d) Only formed to repair damaged muscle tissue

Last Answer : Ans:(c)

On heating, a white amorphous inorganic compound becomes yellow and on cooling, turns white again. The salt may be

Description : On heating, a white amorphous inorganic compound becomes yellow and on cooling, turns white again. The salt may be

Last Answer : On heating, a white amorphous inorganic compound becomes yellow and on cooling, turns white again. The salt may be A. ... `ZnCO_(3)` D. `K_(2)CO_(3)`

Find incorrect statement with regard to centrosome and centrioles :- (a) Centrosomes are surrounded by amorphous pericentriolar material (b) In centro

Description : Find incorrect statement with regard to centrosome and centrioles :- (a) Centrosomes are surrounded by amorphous pericentriolar material (b) In centro

Last Answer : Find incorrect statement with regard to centrosome and centrioles :- (a) Centrosomes are surrounded by amorphous ... b C. b, c D. All are correct

Diamond is the form of carbon that is - (1) Crystalline (2) Amorphous (3) Chemical (4) Alkaline

Description : Diamond is the form of carbon that is - (1) Crystalline (2) Amorphous (3) Chemical (4) Alkaline

Last Answer : (1) Crystalline Explanation: Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic.

Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature. (A) Nylon (B) Polyacrylonitrile (C) Polypropylene (D) Polyester

Description : Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature. (A) Nylon (B) Polyacrylonitrile (C) Polypropylene (D) Polyester

Last Answer : (B) Polyacrylonitrile

. The physical state in which polymers exist is (A) Melts & rubber like state (B) Amorphous glassy state (C) Partially crystalline state (D) All (A), (B) and (C)

Description : . The physical state in which polymers exist is (A) Melts & rubber like state (B) Amorphous glassy state (C) Partially crystalline state (D) All (A), (B) and (C)

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

Orlan fibre which is used as a wool substitute is (A) An amorphous polymer (B) A natural polymeric fibre (C) Polyacrylonitrile (D) Poly-methyl-methacrylate (PMMA)

Description : Orlan fibre which is used as a wool substitute is (A) An amorphous polymer (B) A natural polymeric fibre (C) Polyacrylonitrile (D) Poly-methyl-methacrylate (PMMA)

Last Answer : (C) Polyacrylonitrile

Ceramic materials are (A) Organic in nature (B) Stronger in compression than in tension (C) Always amorphous in nature (D) Always bad heat conductors

Description : Ceramic materials are (A) Organic in nature (B) Stronger in compression than in tension (C) Always amorphous in nature (D) Always bad heat conductors

Last Answer : (B) Stronger in compression than in tension

Which is an amorphous material? (A) Glass (B) Mica (C) Brass (D) Cast iron

Description : Which is an amorphous material? (A) Glass (B) Mica (C) Brass (D) Cast iron

Last Answer : (A) Glass

Common house hold glass (i.e., soda-lime glass) is a/an __________ material. (A) Fully crystalline (B) Partly crystalline (C) Amorphous

Description : Common house hold glass (i.e., soda-lime glass) is a/an __________ material. (A) Fully crystalline (B) Partly crystalline (C) Amorphous

Last Answer : (B) Partly crystalline

How can a material be made amorphous ?

Description : How can a material be made amorphous ? 

Last Answer : By melting the material and by cooling it rapidly.

With increase in temperature, the thermal conductivity of non-metallic amorphous solids (A) Decreases (B) Increases (C) Remain constant (D) First decreases upto certain temperature and then increases

Description : With increase in temperature, the thermal conductivity of non-metallic amorphous solids (A) Decreases (B) Increases (C) Remain constant (D) First decreases upto certain temperature and then increases

Last Answer : (B) Increases

Ordinary glass is not a/an (A) Amorphous isotropic material (B) Supercooled liquid (C) Material with sharp definite melting point (D) Electrical insulator

Description : Ordinary glass is not a/an (A) Amorphous isotropic material (B) Supercooled liquid (C) Material with sharp definite melting point (D) Electrical insulator

Last Answer : (C) Material with sharp definite melting point

While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the (A) Low impact strength (B) High flexibility (C) Better finish and surface appearance (D) High plastic deformation

Description : While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the (A) Low impact strength (B) High flexibility (C) Better finish and surface appearance (D) High plastic deformation

Last Answer : A) Low impact strength

Viscoelastic behaviour is observed in __________ materials. (A) Non-crystalline organic polymeric (B) Ceramic (C) All crystalline (D) All amorphous

Description : Viscoelastic behaviour is observed in __________ materials. (A) Non-crystalline organic polymeric (B) Ceramic (C) All crystalline (D) All amorphous

Last Answer : Non-crystalline organic polymeric

Wood is a/an __________ material. (A) Amorphous (B) Cellular (C) Homogeneous (D) Granular

Description : Wood is a/an __________ material. (A) Amorphous (B) Cellular (C) Homogeneous (D) Granular

Last Answer : (B) Cellular

In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material? (A) Tin(B) Lead (C) Zinc (D) Glass

Description : In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material? (A) Tin (B) Lead (C) Zinc (D) Glass

Last Answer : Option D

Quick lime (or caustic lime) (A) Is obtained by the calcination of pure lime stone (B) Has great affinity to moisture (C) Is amorphous (D) All the abov

Description : Quick lime (or caustic lime) (A) Is obtained by the calcination of pure lime stone (B) Has great affinity to moisture (C) Is amorphous (D) All the above

Last Answer : Answer: Option D

In calculus formation, the epitaxic concept is one of the theories. Which of the following is true: a. Mineralisation occurs when calcium and phosphate content is high. b. The presence of matrix would start initial formation of nucleus. c. The amorphous materials would convert to calcium phosphate and hydroxy phosphate.

Description : In calculus formation, the epitaxic concept is one of the theories. Which of the following is true: a. Mineralisation occurs when calcium and phosphate content is high. b. The presence of ... of nucleus. c. The amorphous materials would convert to calcium phosphate and hydroxy phosphate.

Last Answer : b. The presence of matrix would start initial formation of nucleus.

In calculus formation the epitaxic concept is one of the theories. Which of the following is true: A. Mineralisation occurs when calcium and phosphate content is high B. The presence of matrix would initiate the formation of the nucleus C. The amorphous materials would convert to calcium phosphate and hydroxy

Description : In calculus formation the epitaxic concept is one of the theories. Which of the following is true: A. Mineralisation occurs when calcium and phosphate content is high B. The presence of ... the formation of the nucleus C. The amorphous materials would convert to calcium phosphate and hydroxy

Last Answer : B. The presence of matrix would initiate the formation of the nucleus

A solid in which there is no regular arrangement of molecules is a) Amorphous b) Crystalline c) Copper d) None of above

Description : A solid in which there is no regular arrangement of molecules is a) Amorphous b) Crystalline c) Copper d) None of above

Last Answer : a) Amorphous

A solid is which atoms are in a regular order is called a) Crystalline solid b) Amorphous solid c) Polymeric solid d) Glassy solid

Description : A solid is which atoms are in a regular order is called a) Crystalline solid b) Amorphous solid c) Polymeric solid d) Glassy solid

Last Answer : a) Crystalline solid

If a material has the capacity to behave either as an acid or a base it is said to be: w) amorphous x) amphoteric y) anhydrous z) aklaline

Description : If a material has the capacity to behave either as an acid or a base it is said to be: w) amorphous x) amphoteric y) anhydrous z) aklaline

Last Answer : ANSWER: X -- AMPHOTERIC

For a substance, density, solubility and melting point are examples of: w) physical properties x) amorphous properties y) chemical properties z) potential properties

Description : For a substance, density, solubility and melting point are examples of: w) physical properties x) amorphous properties y) chemical properties z) potential properties

Last Answer : ANSWER: W -- PHYSICAL PROPERTIES

Which of the following substances is classified as amorphous? w) glass x) Zinc y) diamond z) sodium chloride

Description : Which of the following substances is classified as amorphous? w) glass x) Zinc y) diamond z) sodium chloride

Last Answer : ANSWER: W -- GLASS

Explain any four advantages of amorphous transformer.

Description : Explain any four advantages of amorphous transformer.

Last Answer : Advantages of amorphous core transformer: 1) Lowest hysteresis loss. 2) Low eddy current loss. 3) Low temperature rise. 4) Up to 75% energy saving using amorphous metal than conventional metal. 5 ... capacity. 9) High Reliability. 10) Excellent short circuit capacity. 11) Less maintenance cost. 

State the advantages of amorphous core type distribution transformer.

Description : State the advantages of amorphous core type distribution transformer.

Last Answer : Advantages of amorphous core type distribution transformer: 1) Increases efficiency of transformer as constant losses are reduced by 75 % compared to conventional transformers. 2) The material has high ... . 7) High Reliability. 8) Excellent short circuit capacity. 9) Less maintenance cost.

What is amorphous metal material? Give any three properties of amorphous metal.

Description : What is amorphous metal material? Give any three properties of amorphous metal.

Last Answer : Amorphous metal: The amorphous is metal alloy which differ in crystalline structure. The atoms are arranged in random configuration.  Properties of amorphous metal: 1) Thermal conductivity of ... . 6) The alloy does not undergo shrinkage on solidification, which helps in bones attachments.

What is Amorphous metal? Give one application of this metal.

Description : What is Amorphous metal? Give one application of this metal.

Last Answer : Amorphous Metals: Amorphous Metals means materials that do not possess a particular structure. Metal alloys typically possess crystalline atomic structure. The atoms are arranged in particular ... cores of special transformers d) Manufacturing magnetic sensors e) Magneto-motive sensors 

Why can I still smell orange in a bottle that I have washed 10x?

Description : Why can I still smell orange in a bottle that I have washed 10x?

Last Answer : Citrus is stubborn. But really, glass can’t be impervious, things are bumpy when you get real close, and I imagine scents are real small. You get really bumpy and really small together and they get to be really good friends. There is no real science in my answer.

What is the strangest/most interesting thing you’ve found washed up on a beach?

Description : What is the strangest/most interesting thing you’ve found washed up on a beach?

Last Answer : a single, unscathed wooden kitchen spoon

Do you think Alex Jones is washed up?

Description : Do you think Alex Jones is washed up?

Last Answer : What I can’t understand is why ANYONE would give him a voice, a platform or even a second look.

Would it damage your car if you power washed the under side of the engine?

Description : Would it damage your car if you power washed the under side of the engine?

Last Answer : Sounds like you got something wet & it needed to dry out before starting. You probably didn't damage the car just gave it a temporary shock. I don't know that I'd try that on the newer computerized cars ... easily blow the Mother Board & cost $2,000-5,000 to repair. You might want to read more here.

In your opinion do you think it's better if an Athlete retires at the top of their game , or after they know they have lost their edge and washed up?

Description : In your opinion do you think it's better if an Athlete retires at the top of their game , or after they know they have lost their edge and washed up?

Last Answer : Honestly, it's the athlete's personal choice. If playing the game still gives them pleasure and keeps them fit, why quit just because they've passed their peak? When I was younger I hated to ... that I've passed the middle mark, I applaud people doing whatever suits them - career wise, especially.

Will you return an article of clothing after you've washed it?

Description : Will you return an article of clothing after you've washed it?

Last Answer : answer:No, I would not try to return an article of clothing I had washed, not even socks. Yes, I would return an article of clothing if I tried it on and I didn’t like it.