The chief source of naphthalene is – (1) Coal-tear (2) Diesel (3) Charcoal (4) Camphor

The chief source of naphthalene is – (1) Coal-tear (2) Diesel (3) Charcoal (4) Camphor
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(1) Coal-tear Explanation: Coal tar is a brown or black liquid of extremely high viscosity. In the coal gas era, there were many companies in Britain whose business was to distill coal tar to separate the higher-value fractions, such as naphtha, creosote and pitch. Naphthalene is derived from a kind of naphtha (a broad term encompassing any volatile, flammable liquid hydrocarbon mixture, including coal tar).
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The chief source of naphthalene is - (1) Coal-tar (2) Diesel (3) Charcoal (4) Camphor

Description : The chief source of naphthalene is - (1) Coal-tar (2) Diesel (3) Charcoal (4) Camphor

Last Answer : (1) Coal-tar Explanation: Naphthalene is derived from a kind of naphtha which is a broad term encompassing any volatile, flammable liquid hydrocarbon mixture, including coal tar.

The chief source of naphthalene is (1) Coal-tar (2) Diesel (3) Charcoal (4) Camphor

Description : The chief source of naphthalene is (1) Coal-tar (2) Diesel (3) Charcoal (4) Camphor

Last Answer : Coal-tar

The main source of Naphthalene is - (1) Charcoal (2) Camphor (3) Coal-tar (4) Diesel

Description : The main source of Naphthalene is - (1) Charcoal (2) Camphor (3) Coal-tar (4) Diesel

Last Answer : (3) Coal-tar Explanation: The main source of Naphthalene is coal-tar. Naphthalene is derived from a kind of naphtha which is a broad term encompassing any volatile, namable liquid hydrocarbon mixture, including coaltar.

The main source of Naphthalene is (1) Charcoal (2) Camphor (3) Coal-tar (4) Diesel

Description : The main source of Naphthalene is (1) Charcoal (2) Camphor (3) Coal-tar (4) Diesel

Last Answer : Coal-tar

Which of the following is chief source of Naphthalene? (1) Moth balls (2) Moth flakes (3) Tar Camphor (4) Methyl Alcohol

Description : Which of the following is chief source of Naphthalene? (1) Moth balls (2) Moth flakes (3) Tar Camphor (4) Methyl Alcohol

Last Answer : (3) Methyl Alcohol Explanation: Petroleum-derived naphthalene is usually purer than that derived from coal tar.

Which of the following cannot be purified by sublimation? (a) Iodine (b) Camphor (c) Citric acid (d) Naphthalene

Description : Which of the following cannot be purified by sublimation? (a) Iodine (b) Camphor (c) Citric acid (d) Naphthalene

Last Answer : Ans:(c)

The substance that does not burn with flame is a) LPG b)camphor c)dry grass d)charcoal

Description : The substance that does not burn with flame is a) LPG b)camphor c)dry grass d)charcoal

Last Answer : d)charcoal

Which of the following fractions of coal-tar distillation contains naphthalene? (a) Light oil (b) Middle oil (c) Heavy oil (d) Anthracene oil

Description : Which of the following fractions of coal-tar distillation contains naphthalene? (a) Light oil (b) Middle oil (c) Heavy oil (d) Anthracene oil

Last Answer : Middle oil

A fuel of cetane number 40 has the same ignition quality as a mixture of a) 40% cetane and 60% alpha methyl naphthalene b) 40% alpha methyl naphthalene and 60% cetane c) 40% petrol and 60% diesel d) 40% diesel and 60% petrol

Description : A fuel of cetane number 40 has the same ignition quality as a mixture of a) 40% cetane and 60% alpha methyl naphthalene b) 40% alpha methyl naphthalene and 60% cetane c) 40% petrol and 60% diesel d) 40% diesel and 60% petrol

Last Answer : Answer: a Explanation: A fuel of cetane number 40 has the same ignition quality as a mixture of 40% cetane and 60% alpha methyl naphthalene as cetane number is counted on cetane percentage.

Which of the following materials is the chief source of natural organic compounds? w) petroleum x) coal y) natural gas z) carbon dioxide

Description : Which of the following materials is the chief source of natural organic compounds? w) petroleum x) coal y) natural gas z) carbon dioxide

Last Answer : ANSWER: W -- PETROLEUM

Which of the following is not a by-product recovered in a high temperature coal carbonisation plant? (A) Benzol (B) Pitch-creosote mixture (PCM) (C) Naphthalene (D) Ethylene

Description : Which of the following is not a by-product recovered in a high temperature coal carbonisation plant? (A) Benzol (B) Pitch-creosote mixture (PCM) (C) Naphthalene (D) Ethylene

Last Answer : (D) Ethylene

Coal used in power plant is also known as (A) steam coal (B) charcoal (C) coke (D) soft coal.

Description : Coal used in power plant is also known as (A) steam coal (B) charcoal (C) coke (D) soft coal.

Last Answer : Ans: A

Fussain (A) Is friable, charcoal like substance(B) Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal (C) Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation (D) All (A), (B) and (C)

Description : Fussain (A) Is friable, charcoal like substance (B) Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal (C) Is non-coking, but when blended with highly coking ... its swelling and produces high strength coke on carbonisation (D) All (A), (B) and (C)

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

Coal used in power plant is also known as (A) Steam coal (B) Charcoal (C) Coke (D) Soft coal.

Description : Coal used in power plant is also known as (A) Steam coal (B) Charcoal (C) Coke (D) Soft coal.

Last Answer : Steam coal

Producer gas is obtained by  A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast  B. carbonisation of bituminous coal  C. passing steam over incandescent coke  D. passing air and a large amount of steam over waste coal at about 650°C

Description : Producer gas is obtained by  A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast  B. carbonisation of bituminous coal  C. passing steam over incandescent coke  D. passing air and a large amount of steam over waste coal at about 650°C

Last Answer : Answer: A

Producer gas is obtained by  A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast  B. carbonisation of bituminous coal  C. passing steam over incandescent coke  D. passing air and a large amount of steam over waste coal at about 650°C

Description : Producer gas is obtained by  A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast  B. carbonisation of bituminous coal  C. passing steam over incandescent coke  D. passing air and a large amount of steam over waste coal at about 650°C

Last Answer : Answer: A

Name a suitable technique of separation of the components from a mixture of calcium sulphate and camphor.

Description : Name a suitable technique of separation of the components from a mixture of calcium sulphate and camphor.

Last Answer : The components from a mixture of calcium sulphate and camphor can be separated by the process of sublimation.

Why camphor is used in molecular mass determination ?

Description : Why camphor is used in molecular mass determination ?

Last Answer : Ans. Because it has very high cryoscopic constant. It has large depression in m. p. when an organic solute is dissolved in it.

The first plastic was a mixture of cellulose nitrate and camphor invented in the 1860's by John Hyatt. What was the trademark given to this material?

Description : The first plastic was a mixture of cellulose nitrate and camphor invented in the 1860's by John Hyatt. What was the trademark given to this material?

Last Answer : ANSWER: CELLULOID

Impure camphor is purified by (1) sublimation (2) fractional crystallisation (3) fractional distillation (4) steam distillation

Description : Impure camphor is purified by (1) sublimation (2) fractional crystallisation (3) fractional distillation (4) steam distillation

Last Answer : sublimation

Which of the following fuels causes minimum environmental pollution? (1) Diesel (2) Kerosene (3) Hydrogen (4) Coal

Description : Which of the following fuels causes minimum environmental pollution? (1) Diesel (2) Kerosene (3) Hydrogen (4) Coal

Last Answer : (3) Hydrogen Explanation: Coal, diesel and kerosene are examples of fossil fuels that contribute to pollution. In contrast, hydrogen burns in air, it produces nothing but water vapor and energy. It is considered as totally clean and nonpolluting source of energy.

The fuel that is used in modern submarines is – (1) Nuclear fuel (2) Petrol (3) Coal (4) Diesel

Description : The fuel that is used in modern submarines is – (1) Nuclear fuel (2) Petrol (3) Coal (4) Diesel

Last Answer : (1) Nuclear fuel Explanation: Nuclear power is now used in all large submarines, but due to the high cost and large size of nuclear reactors, smaller submarines still use diesel-electric propulsion. ... needs. The US Navy, drench Navy, and the British Royal Navy operate only nuclear submarines.

Which of the following fuels causes minimum environmental pollution? (1) Diesel (2) Kerosene (3) Hydrogen (4) Coal

Description : Which of the following fuels causes minimum environmental pollution? (1) Diesel (2) Kerosene (3) Hydrogen (4) Coal

Last Answer : Hydrogen

The fuel that is used in modern submarines is (1) Nuclear fuel (2) Petrol (3) Coal (4) Diesel

Description : The fuel that is used in modern submarines is (1) Nuclear fuel (2) Petrol (3) Coal (4) Diesel

Last Answer : Nuclear fuel

What is the signal of naphthalene ?

Description : What is the signal of naphthalene ?

Last Answer : This signal is C10H8

An example of heterocyclic compound is – (1) Naphthalene (2) Furan (3) Benzene (4) Anthracene

Description : An example of heterocyclic compound is – (1) Naphthalene (2) Furan (3) Benzene (4) Anthracene

Last Answer : (2) Furan Explanation: A heterocyclic compound is a cyclic compound that has atoms of at least two different elements as members ails ring (s). Furan is a heterocyclic organic compound, consisting of a five-membered aromatic ring with four carbon atoms and one oxygen.

By-product obtained by soap industry is – (1) Caustic soda (2) Glycerol (3) Naphthalene (4) Caustic potash

Description : By-product obtained by soap industry is – (1) Caustic soda (2) Glycerol (3) Naphthalene (4) Caustic potash

Last Answer : (2) Glycerol Explanation: Glycerol forms the backbone of triglyeerides, and is chiefly produced by saponification of fats as a byproduct of soapmaking. It is also a byproduct of the production of ... This form of crude glycerin is often dark in appearance with a thick, syrup-like consistency.

Naphthalene undergoes nitration with HNO3/H2SO4 at 60°C to give mainly (a) 1-Nitronaphthalene (b) 1,2-Dinitronaphthalene (c) 2-Nitronaphthalene (d) 1,5-Dinitronaphthalene

Description : Naphthalene undergoes nitration with HNO3/H2SO4 at 60°C to give mainly (a) 1-Nitronaphthalene (b) 1,2-Dinitronaphthalene (c) 2-Nitronaphthalene (d) 1,5-Dinitronaphthalene

Last Answer : 1-Nitronaphthalene

Naphthalene undergoes reduction with H2 in the presence of Ni catalyst at high temperature and pressure to give (a) Phthalic acid (b) Decalin (c) Benzoic acid (d) Tetralin

Description : Naphthalene undergoes reduction with H2 in the presence of Ni catalyst at high temperature and pressure to give (a) Phthalic acid (b) Decalin (c) Benzoic acid (d) Tetralin

Last Answer : Decalin

Naphthalene undergoes oxidation with Na2Cr2O7 / H2SO4 to form (a) Phthalic acid (b) Phenylacetic acid (c) Tetralin (d) Benzoic acid

Description : Naphthalene undergoes oxidation with Na2Cr2O7 / H2SO4 to form (a) Phthalic acid (b) Phenylacetic acid (c) Tetralin (d) Benzoic acid

Last Answer : Phthalic acid

All carbon atoms in naphthalene are (a) sp hybridized (b) sp2 hybridized (c) sp3 hybridized (d) None of these

Description : All carbon atoms in naphthalene are (a) sp hybridized (b) sp2 hybridized (c) sp3 hybridized (d) None of these

Last Answer : sp2 hybridized

How many carbon atoms are there in one naphthalene molecule? w) 6 x) 8 y) 10 z) 15

Description : How many carbon atoms are there in one naphthalene molecule? w) 6 x) 8 y) 10 z) 15

Last Answer : ANSWER: Y -- 10

Moth balls contain: w) formalin x) chitin (pron: kite-en) y) formaldehyde z) naphthalene

Description : Moth balls contain: w) formalin x) chitin (pron: kite-en) y) formaldehyde z) naphthalene

Last Answer : ANSWER: Z -- NAPHTHALENE

Give the empirical formula for the organic compound naphthalene?

Description : Give the empirical formula for the organic compound naphthalene?

Last Answer : ANSWER: C10H8

Which of the following is NOT an aromatic hydrocarbon? w) naphthalene x) hexane y) styrene z) xylene

Description : Which of the following is NOT an aromatic hydrocarbon? w) naphthalene x) hexane y) styrene z) xylene

Last Answer : ANSWER: X -- HEXANE 

An example of heterocyclic compound is (1) Naphthalene (2) Furan (3) Benzene (4) Anthracene

Description : An example of heterocyclic compound is (1) Naphthalene (2) Furan (3) Benzene (4) Anthracene

Last Answer : Furan

By-product obtained by soapindustry is (1) Caustic soda (2) Glycerol (3) Naphthalene (4) Caustic potash

Description : By-product obtained by soapindustry is (1) Caustic soda (2) Glycerol (3) Naphthalene (4) Caustic potash

Last Answer : Glycerol

Which of the following method is used to separate a mixture of salt and camphor? -Science

Description : Which of the following method is used to separate a mixture of salt and camphor? -Science

Last Answer : Sublimation is a technique used to separate the components of a mixture containing a sublimable volatile solid and a non-sublimable impurity. Therefore, the mixture of camphor and sodium chloride can be separated by the process of sublimation.

A mixture of camphor and benzoic acid can be easily separated by which method? -General Knowledge

Description : A mixture of camphor and benzoic acid can be easily separated by which method? -General Knowledge

Last Answer : The answer is 'Chemical method'

A mixture of camphor and benzoic acid can be easily separated by which method? -General Knowledge

Description : A mixture of camphor and benzoic acid can be easily separated by which method? -General Knowledge

Last Answer : Camphor is a sublime solid, hence mixture of camphor and benzoic acid can be separated by sublimation when benzoic acid remains in the pot while camphor vapourise and collected separately.

Why is camphor called volatile substance ?

Description : Why is camphor called volatile substance ?

Last Answer : When heat is applied to a solid, it is directly from the solid to the gaseous state called their volatile substance. When camphor is heated, it does not turn into a liquid, but directly evaporates camphor , hence camphor is a volatile substance.

What is the function of camphor (100 ml) syrup ?

Description : What is the function of camphor (100 ml) syrup ?

Last Answer : It is indicated for the treatment of asthma in adults and children up to 6 years. If your child is under 6 years of age, then take it with the advice of a doctor.

What is the sign of camphor

Last Answer : : The signal of camphor is c10h16o

How separate the sand and camphor by sublimation process?

Description : How separate the sand and camphor by sublimation process?

Last Answer : Sublimation of camphor occur faster by heating and sand remain.

Which of the following is NOT a plant product? (a) Camphor (b) Aloe vera (c) Vanilla (d) Kiwi (e) All are plant products

Description : Which of the following is NOT a plant product? (a) Camphor (b) Aloe vera (c) Vanilla (d) Kiwi (e) All are plant products

Last Answer : Ans: (e)

Why camphor disappears when kept on a plate? (a) It sublimes (b) It reacts with the metal of the container (c) It reacts with the gases of the air (d) None of the above

Description : Why camphor disappears when kept on a plate? (a) It sublimes (b) It reacts with the metal of the container (c) It reacts with the gases of the air (d) None of the above

Last Answer : Ans:(a)

Consider the following changes: 1. Curdling of milk 2. Sublimation of camphor 3. Drying of paint 4. Oxidation of SO2 to SO3 The chemical changes are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

Description : Consider the following changes: 1. Curdling of milk 2. Sublimation of camphor 3. Drying of paint 4. Oxidation of SO2 to SO3 The chemical changes are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

Last Answer : Ans:(b)

The compound that is not a natural product is (a) pinene (b) citral (c) camphor (d) styrene

Description : The compound that is not a natural product is (a) pinene (b) citral (c) camphor (d) styrene

Last Answer : Ans:(d)

Camphor can easily be purified by the process of (a) Sublimation (b) Distillation (c) Crystallisation (d) Sedimentation

Description : Camphor can easily be purified by the process of (a) Sublimation (b) Distillation (c) Crystallisation (d) Sedimentation

Last Answer : Ans:(a)

Pieces of camphor placed on water move about rapidly. This is because of - (1) diffusion (2) viscosity (3) surface tension (4) capillarity

Description : Pieces of camphor placed on water move about rapidly. This is because of - (1) diffusion (2) viscosity (3) surface tension (4) capillarity

Last Answer : (3) surface tension Explanation: The Camphor slowly dissolves in the water lowering the latter's surface tension in the immediate neighbourhood. When after sometime the whole surface settles for the reduced tension, the movement of the camphor too short.