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

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

1 Answer

Answer :

A) Graphite
by

Related questions

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.

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

Last Answer : graphite

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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.

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

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Last Answer : (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 ... of graphite mixed with a clay binder, leaving grey or black marks that can be easily erased.

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If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

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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?

Lead pencil contains

Description : Lead pencil contains

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Description : Lead acetate test in sewer manhole is done to test the presence of A. Methane gas B. Hydrogen sulphide C. Carbondioxide gas D. Diesel vapours

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Description : Which compound is used as oxidizing agent for lead sulphide to restore the color of lead paintings?

Last Answer : Ans-H2O2

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Gobar gas mainly contains – (1) Carbon dioxide (2) Carbon monoxide (3) Hydrogen sulphide (4) Methane

Description : Gobar gas mainly contains – (1) Carbon dioxide (2) Carbon monoxide (3) Hydrogen sulphide (4) Methane

Last Answer : (4) Methane Explanation: Biogas or Lobar gas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material ... (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.

Tear gas used by the police to disperse the mob contains – (1) carbon dioxide (2) chlorine (3) ammonia (4) hydrogen sulphide

Description : Tear gas used by the police to disperse the mob contains – (1) carbon dioxide (2) chlorine (3) ammonia (4) hydrogen sulphide

Last Answer : (2) chlorine Explanation: Tear gas is a compound. Each molecule of tear gas contains one atom of chlorine. The compound 2- chlorobenzalmalononitrile, a cyanocarbon, is the defining component of a "tear gas" commonly referred to as CS gas, which is used as a riot control agent.

If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

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If the flame of a miner’s safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

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Tear gas used by the police to disperse the mob contains (1) carbon dioxide (2) chlorine (3) ammonia (4) hydrogen sulphide

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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

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Last Answer : Because it has no point.

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

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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?

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Last Answer : It is a homogeneous mixture.

Consider a pack contains 2black, 9 white and 3 pink pencils. If a pencil is drawn at random from the pack, replaced and the process repeated 2 more times, What is the probability of drawing 2 black pencils and 1 pink pencil? a)3/ 49 b)3/686 c)3/14 d)3/545

Description : Consider a pack contains 2black, 9 white and 3 pink pencils. If a pencil is drawn at random from the pack, replaced and the process repeated 2 more times, What is the probability of drawing 2 black pencils and 1 pink pencil? a)3/ 49 b)3/686 c)3/14 d)3/545

Last Answer : Answer: B) Here, total number of pencils = 14 Probability of drawing 1 black pencil = 2/14 Probability of drawing another black pencil = 2/14 Probability of drawing 1 pink pencil = 3/14 Probability of drawing 2 black pencils and 1 pink pencil = 2/14 * 2/14 * 3/14 = 3/686

With increase in carbide/graphite ratio in cast iron, its (A) Hardness & brittleness increases (B) Ductility decreases (C) Both (A) and (B) (D) Neither (A) nor (B)

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Graphite is a good (A) Thermal & electrical insulator (B) Conductor of heat (C) Conductor of electricity (D) Both (B) & (C)

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Exposure to small amount of __________ results in high blood pressure & heart disease in human beings. (A) Hydrogen sulphide (B) Mercury (C) Cadmium (D) Asbestos

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Last Answer : (C) Cadmium

The main industrial source of emission of hydrogen sulphide air pollutant is (A) Petroleum refineries (B) Coal based thermal power plants (C) Pulp and paper plant (D) Metallurgical roasting & smelting plant

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In Kraft process of paper manufacture, white cooking liquor consists of caustic soda (A) Sodium sulphide & sodium carbonate (B) Sodium sulphite & sodium carbonate (C) Sodium sulphite & sodium sulphide (D) None of these

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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

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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 of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C? (A) Silicone rubber, teflon, porcelain and wood (B) Nickel, monel, stainless steel and graphite (C) Aluminium, copper, high silicon iron (D) Brass, cast iron, mild steel and tin

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