Why camphor is used in molecular mass determination ?

Why camphor is used in molecular mass determination ?
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1 Answer

Answer :

Ans. Because it has very high cryoscopic constant.

It has large depression in m. p. when an organic solute is dissolved in it.
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Application of HPLC includes? A. Detection of functional groups in organic compounds B. Determination of molecular mass C. Separation of volatile compounds D. Impurity profiling

Description : Application of HPLC includes? A. Detection of functional groups in organic compounds B. Determination of molecular mass C. Separation of volatile compounds D. Impurity profiling

Last Answer : D. Impurity profiling

The antibodies raised against a pure protein will show only one sharp spike on this technique: (A) Solubility curve (B) Solvent precipitation (C) Molecular weight determination (D) Immuno electrophoresis

Description : The antibodies raised against a pure protein will show only one sharp spike on this technique: (A) Solubility curve (B) Solvent precipitation (C) Molecular weight determination (D) Immuno electrophoresis

Last Answer : Answer : D

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

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

Last Answer : (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 ... of naphtha (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 : (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.

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.

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.

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.

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

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 : Coal-tar

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 colligative property is preferred for the molar mass determination of macro molecules ? Why ?

Description : Which colligative property is preferred for the molar mass determination of macro molecules ? Why ?

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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)

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)

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.

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 neighborhood. The stronger pull exerted by the uncontaminated portion of water brings about a movement of the surface and the camphor particles are carried along with it.

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

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

Last Answer : Chemical method

Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding (A) Glycerol (B) Nitro cellulose (C) Camphor (D) None of these

Description : Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding (A) Glycerol (B) Nitro cellulose (C) Camphor (D) None of these

Last Answer : (C) Camphor

Which of the following solutions will follow Raoult's law most closely? (A) A solution of benzene, toluene and o-xylene (B) 35% solution of camphor in water (C) 35% solution of NH3 in water (D) A solution of polar organic compounds (not of homologue of a series)

Description : Which of the following solutions will follow Raoult's law most closely? (A) A solution of benzene, toluene and o-xylene (B) 35% solution of camphor in water (C) 35% solution of NH3 in water (D) A solution of polar organic compounds (not of homologue of a series)

Last Answer : (A) A solution of benzene, toluene and o-xylene

Pick up the correct statement from the following: (A) Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite (B) Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite (C) Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic (D) All the above

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Last Answer : Answer: Option D

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

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For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is (A) Calculated (B) Unknown (C) Known (D) Not required

Description : For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is (A) Calculated (B) Unknown (C) Known (D) Not required

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Experimental determination of __________ is done by wetted wall column method. (A) Diffusion co-efficient (B) Mass transfer co-efficient (C) NTU (D) None of these

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For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass? (A) Oven drying method (B) Sand bath method (C) Alcohol method (D) Calcium carbide method

Description : For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass? (A) Oven drying method (B) Sand bath method (C) Alcohol method (D) Calcium carbide method

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A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further 18 g of water is added to this solution. The new vapour pressure becomes 2.9 kPa at 298 K. Calculate (i) the molecular mass of solute and (ii) vapour pressure of water at 298 K -Chemistry

Description : A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further 18 g of water is added to this solution. The new vapour pressure ... K. Calculate (i) the molecular mass of solute and (ii) vapour pressure of water at 298 K -Chemistry

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What is the molecular mass of methane ?

Description : What is the molecular mass of methane ?

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What is the molecular mass of glucose ?

Description : What is the molecular mass of glucose ?

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The molecular mass of a gas is – (1) twice its vapour pressure (2) equal to its vapour pressure (3) half its vapour pressure (4) not related to its vapour pressure

Description : The molecular mass of a gas is – (1) twice its vapour pressure (2) equal to its vapour pressure (3) half its vapour pressure (4) not related to its vapour pressure

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The molecular mass of a has is – (1) twice its vapour pressure (2) equal to its vapour pressure (3) half its vapour pressure (4) not related to its vapour pressure

Description : The molecular mass of a has is – (1) twice its vapour pressure (2) equal to its vapour pressure (3) half its vapour pressure (4) not related to its vapour pressure

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Atomic mass of Nitrogen is 14 and that of Hydrogen is 1. What will be the molecular mass of Ammonia? (1) 18 (2) 17 (3) 16 (4) 15

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Describe: a) gram molecular mass b) Molar Volume.

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Why does solubility decreases with increasing molecular mass in carboxylic acid ?

Description : Why does solubility decreases with increasing molecular mass in carboxylic acid ?

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Which one of the following statements about the mass spectrum of CH3Br is correct? a. the last two peaks are of equal size and occur at m/z values of 94 and 96 b. the last two peaks have abundances in the ratio 3:1 and occur at m/z values of 94 and 96 c. there is just one peak for the molecular ion with an m/z value of 95 d. there is just one peak for the molecular ion with an m/z value of 44

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Last Answer : a. the last two peaks are of equal size and occur at m/z values of 94 and 96

Vapour density of a gas is 22. What is its molecular mass? [AFMC 2000] (A) 33 (B) 22 (C) 44 (D) 11

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Last Answer : (C) 44

what is the name given to a semisolid suspension of a material of high molecular mass in a liquid solvent?

Description : what is the name given to a semisolid suspension of a material of high molecular mass in a liquid solvent?

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What two primary factors determine whether or no molecular collision leads to a chemical reaction? w) energy and volume of molecules x) energy and mass of molecules y) energy and orientation of molecules z) orientation and volume of molecules

Description : What two primary factors determine whether or no molecular collision leads to a chemical reaction? w) energy and volume of molecules x) energy and mass of molecules y) energy and orientation of molecules z) orientation and volume of molecules

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Which of the following liquid types would have th highest viscosity? w) low molecular mass-polar liquid x) high molecular mass-polar liquid y) low molecular mass-nonpolar liquid d high molecular mass-nonpolar liquid

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The molecular mass of a gas is (1) twice its vapour pressure (2) equal to its vapour pressure (3) half its vapour pressure (4) not related to its vapour pressure

Description : The molecular mass of a gas is (1) twice its vapour pressure (2) equal to its vapour pressure (3) half its vapour pressure (4) not related to its vapour pressure 

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Which of the following is the first step in the determination of the primary structure of proteins? (a) determining the number and kind of amino acids in the peptide (b) reducing the disulfide bridges in the protein (c) protecting the N-terminal of the peptide (d) protecting the C-terminal of the peptide

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Last Answer : reducing the disulfide bridges in the protein