The material used in the manufacture of lead pencil is – (1) Graphite (2) Lead (3) Carbon (4) Mica

The material used in the manufacture of lead pencil is – (1) Graphite (2) Lead (3) Carbon (4) Mica
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(1) Graphite Explanation: Pencils create marks via physical abrasion, leaving behind a trail of solid core material that adheres to a sheet of paper or other surface. They are noticeably distinct from pens, which dispense liquid or gel ink that stain the light colour of the paper. Most pencil cores are made of graphite mixed with a clay binder, leaving grey or black marks that can be easily erased.
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The material used in the manufacture of lead pencil is (1) Graphite (2) Lead (3) Carbon (4) Mica

Description : The material used in the manufacture of lead pencil is (1) Graphite (2) Lead (3) Carbon (4) Mica

Last Answer : Graphite

Lead pencil contains - (1) Lead nitrate (2) Graphite (3) Lead peroxide (4) Lead Sulphate

Description : Lead pencil contains - (1) Lead nitrate (2) Graphite (3) Lead peroxide (4) Lead Sulphate

Last Answer : (2) Graphite Explanation: Most pencil cores are made of graphite mixed with a clay binder which leaves grey or black marks that can be easily erased.

Lead pencil contains – (1) lead (2) ferrous sulphide (3) lead sulphide (4) graphite

Description : Lead pencil contains – (1) lead (2) ferrous sulphide (3) lead sulphide (4) graphite

Last Answer : (4) graphite Explanation: Most pencil cores are made of graphite mixed with a clay binder, leaving grey or black marks that can be easily erased. Graphite pencils are used for both writing ... with an eraser, it is resistant to moisture, most chemicals, ultraviolet radiation and natural aging.

Lead pencil contains (1) lead (2) ferrous sulphide (3) lead sulphide (4) graphite

Description : Lead pencil contains (1) lead (2) ferrous sulphide (3) lead sulphide (4) graphite

Last Answer : graphite

Lead pencil contains (A) Graphite (B) Lead sulphide (C) Lead (D) Both (B) & (C)

Description : Lead pencil contains (A) Graphite (B) Lead sulphide (C) Lead (D) Both (B) & (C)

Last Answer : A) Graphite

The insulating material used between the commutator segments is normally (a) graphite (b) paper (c) mica (d) insulating varnish

Description : The insulating material used between the commutator segments is normally (a) graphite (b) paper (c) mica (d) insulating varnish

Last Answer : Ans: c

Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes (A) Asphyxiation (suffocation) (B) Shortness of breath (C) Tuberculosis (D) All (A), (B) and (C)

Description : Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes (A) Asphyxiation (suffocation) (B) Shortness of breath (C) Tuberculosis (D) All (A), (B) and (C)

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

The commonly used material in the manufacture of cement is (A) Sand stone (B) Slate (C) Lime stone (D) Graphite

Description : The commonly used material in the manufacture of cement is (A) Sand stone (B) Slate (C) Lime stone (D) Graphite

Last Answer : (C) Lime stone

Can I use a 4b graphite pencil for regular drawing?

Description : Can I use a 4b graphite pencil for regular drawing?

Last Answer : Why not try it and see whether it suits your particular needs?

A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is (A) Lead (B) Glass (C) Mica (D) Silver

Description : A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is (A) Lead (B) Glass (C) Mica (D) Silver

Last Answer : (A) Lead

Material of construction of foundry crucible is (A) Lead (B) Stainless steel (C) Graphite

Description : Material of construction of foundry crucible is (A) Lead (B) Stainless steel (C) Graphite

Last Answer : Option C

The material for commutator brushes is generally (a) mica (b) copper (c) cast iron (d) carbon

Description : The material for commutator brushes is generally (a) mica (b) copper (c) cast iron (d) carbon

Last Answer : Ans: d

Deacon's method is used for the manufacture of (A) Glauber's salt (B) Common salt (C) Chlorine (D) Graphite electrode

Description : Deacon's method is used for the manufacture of (A) Glauber's salt (B) Common salt (C) Chlorine (D) Graphite electrode

Last Answer : (C) Chlorine

Calcareous & argillaceous materials are used in the manufacture of (A) Lead (B) Cement (C) Carbon disulphide (D) None of these

Description : Calcareous & argillaceous materials are used in the manufacture of (A) Lead (B) Cement (C) Carbon disulphide (D) None of these

Last Answer : (B) Cement

Of the following types of material, which is the one that is heterogeneous? Is it: w) quartz x) feldspar y) granite z) mica

Description : Of the following types of material, which is the one that is heterogeneous? Is it: w) quartz x) feldspar y) granite z) mica

Last Answer : ANSWER: Y -- GRANITE

Carbon occurs in nature in the purest form as - (1) Diamond (2) Graphite (3) Carbon black (4) Coal

Description : Carbon occurs in nature in the purest form as - (1) Diamond (2) Graphite (3) Carbon black (4) Coal

Last Answer : (1) Diamond Explanation: There are three forms of pure carbon: Graphite, Coal and Diamond. All three are made up of elemental carbon, caol is the least pure when found in nature. Diamond is the purest form of Carbon.

As which one of the following, does carbon occur in its purest form in nature? (1) Carbon black (2) Graphite (3) Diamond (4) Coal

Description : As which one of the following, does carbon occur in its purest form in nature? (1) Carbon black (2) Graphite (3) Diamond (4) Coal

Last Answer : (3) Diamond Explanation: The purest form of carbon is neither diamond nor graphene or graphite . It is 'Fullerene' , the purest form of carbon.

Which of the following is the purest form of Carbon? (1) Charcoal (2) Granite (3) Diamond (4) Graphite

Description : Which of the following is the purest form of Carbon? (1) Charcoal (2) Granite (3) Diamond (4) Graphite

Last Answer : (3) Diamond Explanation: Because the carbon atoms in diamond are more tightly bound than in graphite (as diamond is the hardest material known), it is more difficult for impurities to get into the diamond lattice and as a result diamonds are often more pure than graphite.

_____is not an allotrope of carbon. (1) Buckminsterfullerene (2) Carbon Doxide (3) Diamond (4) Graphite

Description : _____is not an allotrope of carbon. (1) Buckminsterfullerene (2) Carbon Doxide (3) Diamond (4) Graphite

Last Answer : (2) Carbon Doxide Explanation: Carbon is capable of forming many allotropes due to its valency. Well-known forms of carbon include diamond and graphite. Other allotropes in clude: include buckyballs (fullerenes), amorphous carbon, glassy carbon, carbon nanofoam, nanotubes,and others.

The most pure form of Carbon among the options is – (1) Anthracite (2) Lampblack (3) Graphite (4) Wood Charcoal

Description : The most pure form of Carbon among the options is – (1) Anthracite (2) Lampblack (3) Graphite (4) Wood Charcoal

Last Answer : (1) Anthracite Explanation: There are three forms of pure carbon: graphite, coal and diamond. Among coal, Anthracite has the highest carbon content, the fewest impurities, and the highest calorific content ... the most metamorphosed type of coal in which the carbon content is between 92.1% and 98%.

Hardest allotrope of carbon is - (1) diamond (2) graphite (3) coke (4) lamp black

Description : Hardest allotrope of carbon is - (1) diamond (2) graphite (3) coke (4) lamp black

Last Answer : (1) diamond Explanation: Diamond is one well known allotrope of carbon. The hardness and high dispersion of light of diamond make it useful for both industrial applications and jewellery. Diamond is ... mineral. This makes it an excellent abrasive and makes it hold polish and luster extremely well.

Which of the following is used as filler in tyre of rubber? (1) Carbon black (2) Coal (3) Coke (4) Graphite

Description : Which of the following is used as filler in tyre of rubber? (1) Carbon black (2) Coal (3) Coke (4) Graphite

Last Answer : (1) Carbon black Explanation: The most common use (70%) of carbon black is as a pigment and reinforcing phase in automobile tires. Carbon black also helps conduct heat away from the tread and belt area of the tire, reducing thermal damage and increasing tire life.

Out of carbon(diamond)and carbon (graphite) whose enthalpy of formation is taken as zero?

Description : Out of carbon(diamond)and carbon (graphite) whose enthalpy of formation is taken as zero?

Last Answer : Ans. Enthalpy of formation of carbon in the form of graphite is taken as zero because it is a more commonly found in stable form of carbon.

Graphite carbon atoms form planar layers in what regular geometric arrangement?

Description : Graphite carbon atoms form planar layers in what regular geometric arrangement?

Last Answer : ANSWER: HEXAGONAL 

The most pure form of Carbon among the options is (1) Anthracite (2) Lampblack (3) Graphite (4) Wood Charcoal

Description : The most pure form of Carbon among the options is (1) Anthracite (2) Lampblack (3) Graphite (4) Wood Charcoal

Last Answer : Anthracite

Hardest allotrope of carbon is (1) diamond (2) graphite (3) coke (4) lamp black

Description : Hardest allotrope of carbon is (1) diamond (2) graphite (3) coke (4) lamp black

Last Answer : diamond

Which of the following is used as filler in tyre of rubber ? (1) Carbon black (2) Coal (3) Coke (4) Graphite

Description : Which of the following is used as filler in tyre of rubber ? (1) Carbon black (2) Coal (3) Coke (4) Graphite

Last Answer : Carbon black

In which of the following substances all carbon atoms are quaternary in nature ? (1) Graphite (2) Diamond (3) Teflon (4) Napthalene

Description : In which of the following substances all carbon atoms are quaternary in nature ? (1) Graphite (2) Diamond (3) Teflon (4) Napthalene

Last Answer : Diamond

Hazaribagh district in Jharkhand has rich deposits of (a) gold (b) mica (c) gypsum (d) lead

Description : Hazaribagh district in Jharkhand has rich deposits of (a) gold (b) mica (c) gypsum (d) lead

Last Answer : Ans: (b)

How do you change the lead in a mechanical pencil?

Description : How do you change the lead in a mechanical pencil?

Last Answer : Usually you can pull the eraser off and add more lead that way. Sometimes you have to feed it in from the tip of the pencil, if the eraser won't come off. To do this, just click the pencil, hold it clicked, and slide a piece of lead into the tip.

Why is a bad pin like a broken lead pencil? -Riddles

Description : Why is a bad pin like a broken lead pencil? -Riddles

Last Answer : Because it has no point.

A lead pencil consists of a cylinder of wood -Maths 9th

Description : A lead pencil consists of a cylinder of wood -Maths 9th

Last Answer : Radius of solid graphite cylinder (r) = 1/2 mm = 1/2 x 1/10 = 1/20 cm Length of graphite cylinder (h) = 14 cm Volume of graphite cylinder (h) = πr2h = 22/7 x 1/20 x 1/20 x 14 = 0.11 cm3 Radius ... Volume of the wood = Volume of the pencil - Volume of the graphite = 5.39 cm3 - 0 .11 cm3 = 5.28 cm3

Is pencil lead a compound element or solution?

Description : Is pencil lead a compound element or solution?

Last Answer : Pencil lead is a mixture of graphite (the element carbon) andclay- which is itself a mixture of several different compounds andelements.

Is pencil lead a compound or an element or an homogeneous mixture or a heterogeneous mixture?

Description : Is pencil lead a compound or an element or an homogeneous mixture or a heterogeneous mixture?

Last Answer : It is a homogeneous mixture.

Lead pencil contains

Description : Lead pencil contains

Last Answer : Graphite

Hardest material is - (1) Tungsten (2) Diamond (3) Steel (4) Graphite

Description : Hardest material is - (1) Tungsten (2) Diamond (3) Steel (4) Graphite

Last Answer : (2) Diamond Explanation: Diamondsare commonly known as the hardest substance on earth, used in drill bits for cutting applications.

Pick out the wrong statement. (A) Catalytic hydrogenation of carbon monoxide produces methyl alcohol (B) In nylon-6, the number 6 represents the total number of carbon atoms in the ring (C) Raw materials for DDT manufacture are benzene and chlorine (D) Ethanolamines are produced by using ammonia and ethylene oxide as raw material

Description : Pick out the wrong statement. (A) Catalytic hydrogenation of carbon monoxide produces methyl alcohol (B) In nylon-6, the number 6 represents the total number of carbon atoms in the ring (C ... are benzene and chlorine (D) Ethanolamines are produced by using ammonia and ethylene oxide as raw material

Last Answer : (C) Raw materials for DDT manufacture are benzene and chlorine

Carbon tetrachloride (CCl4 ) is the starting raw material for the manufacture of (A) Trichloroethylene (B) Perchloroethylene (C) Parathion (D) Methanol

Description : Carbon tetrachloride (CCl4 ) is the starting raw material for the manufacture of (A) Trichloroethylene (B) Perchloroethylene (C) Parathion (D) Methanol

Last Answer : (B) Perchloroethylene

Match the following: List-I List-II (Minerals) (Mining areas) A. Graphite 1. Bellary B. Lead 2. Didwana C. Salt 3. Rampa D. Silver 4. Zawar Codes: (a) 3 4 1 2 (b) 1 4 2 3 (c) 3 1 4 2 (d) 2 3 1 4

Description : Match the following: List-I List-II (Minerals) (Mining areas) A. Graphite 1. Bellary B. Lead 2. Didwana C. Salt 3. Rampa D. Silver 4. Zawar Codes: (a) 3 4 1 2 (b) 1 4 2 3 (c) 3 1 4 2 (d) 2 3 1 4

Last Answer : Ans: (b)

Match the following: [IAS 1998] Minerals Mining area A: Graphite 1. Bellary B. Lead 2. Didwana C. Salt 3. Rampa D. Silver 4. Zawar A B C D (a) 3 4 1 2 (b) 1 4 2 3 (c) 3 1 4 2 (d) 2 3 1 4

Description : Match the following: [IAS 1998] Minerals Mining area A: Graphite 1. Bellary B. Lead 2. Didwana C. Salt 3. Rampa D. Silver 4. Zawar A B C D (a) 3 4 1 2 (b) 1 4 2 3 (c) 3 1 4 2 (d) 2 3 1 4

Last Answer : Ans: (b)

Which one of the following elements is used in the manufacture of fertilizers? (1) Fluorine (2) Potassium (3) Lead (4) Aluminium

Description : Which one of the following elements is used in the manufacture of fertilizers? (1) Fluorine (2) Potassium (3) Lead (4) Aluminium

Last Answer : (2) Potassium Explanation: Nitrogen, phosphorus and potassium are the three most common bases of fertilizers. Potash can be used to make potassium (K) fertilizers. All commercial potash deposits come originally from marine deposits and are often buried deep in the earth.

Which one of the following elements is used in the manufacture of fertilizers ? (1) Fluorine (2) Potassium (3) Lead (4) Aluminium

Description : Which one of the following elements is used in the manufacture of fertilizers ? (1) Fluorine (2) Potassium (3) Lead (4) Aluminium

Last Answer : Potassium

Which of the listed conditions might contribute to very rapid wearing of a DC machine's commutator bars? A. A grounded commutator bar B. Using improper carbon brushes C. Aligning the front and rear mica V-rings improperly D. An open circuit in the armature

Description : Which of the listed conditions might contribute to very rapid wearing of a DC machine's commutator bars? A. A grounded commutator bar B. Using improper carbon brushes C. Aligning the front and rear mica V-rings improperly D. An open circuit in the armature

Last Answer : Answer: B

The field coils of D.C. generator are usually made of (a) mica (b) copper (c) cast iron (d) carbon

Description : The field coils of D.C. generator are usually made of (a) mica (b) copper (c) cast iron (d) carbon

Last Answer : Ans: b (b) copper

In which of the following industries is mica used as a raw material? (a) Electrical (b) Iron and steel (c) Toys (d) Glass and pottery

Description : In which of the following industries is mica used as a raw material? (a) Electrical (b) Iron and steel (c) Toys (d) Glass and pottery

Last Answer : Ans:(a)

The 'dielectric constant' is a numerical value indicating the effectiveness of a dielectric material in comparison to that of a standard, which is _______________. A. paper or cloth B. glass or mica C. plastic or Teflon D. dry air or a vacuum

Description : The 'dielectric constant' is a numerical value indicating the effectiveness of a dielectric material in comparison to that of a standard, which is _______________. A. paper or cloth B. glass or mica C. plastic or Teflon D. dry air or a vacuum

Last Answer : Answer: D

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

Which of the following is not a dielectric material? (A) Cotton, silk and paper (B) Asbestos, glass, porcelain and mica (C) Rubber and polymeric resins (D) All refractory materials

Description : Which of the following is not a dielectric material? (A) Cotton, silk and paper (B) Asbestos, glass, porcelain and mica (C) Rubber and polymeric resins (D) All refractory materials

Last Answer : Option C

Mica is a (A) Dielectric material. (B) Insulating material. (C) Magnetic material. (D) Both insulating and dielectric material.

Description : Mica is a (A) Dielectric material. (B) Insulating material. (C) Magnetic material. (D) Both insulating and dielectric material.

Last Answer : (D) Both insulating and dielectric material.

Write one application for the give dielectric material. (i) Polyvinyl Carbide(PVC) (ii) Glass (iii) Mica (iv) Cotton and Silk

Description : Write one application for the give dielectric material. (i) Polyvinyl Carbide(PVC) (ii) Glass (iii) Mica (iv) Cotton and Silk

Last Answer : (i) Polyvinyl Carbide(PVC):it is used in insulation of wires and cables in domestic wiring as well as in aircraft and factory wiring (any one)  (ii) Glass: 1) Alkaline glasses are used for ... with wax or varnishes are used in windings of magnet coils and small medium sized mechanics (any one)