Phenol on distilling with zinc dust gives

Phenol on distilling with zinc dust gives
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Phenol on distilling with zinc dust gives A. benzene B. diphenyl ether C. diphenol D. zinc phenoxide
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Which of the following reactions does not produce benzene as one of the products? (a) Treating benzenediazonium chloride with H3PO2 (b) Distilling phenol with zinc dust (c) Fusing sodium benzoate with NaOH (d) Fusing sodium benzenesulfonate with NaOH

Description : Which of the following reactions does not produce benzene as one of the products? (a) Treating benzenediazonium chloride with H3PO2 (b) Distilling phenol with zinc dust (c) Fusing sodium benzoate with NaOH (d) Fusing sodium benzenesulfonate with NaOH

Last Answer : Fusing sodium benzenesulfonate with NaOH

Phenol on distillation with Zinc dust gives (a) Phenylzinc (b) Benzene (c) Cyclohexanone (d) Benzoic acid

Description : Phenol on distillation with Zinc dust gives (a) Phenylzinc (b) Benzene (c) Cyclohexanone (d) Benzoic acid

Last Answer : Benzene

Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E. Compound E on furhter treatment with aqueous KOH yields comp

Description : Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E. Compound E on furhter treatment with aqueous KOH yields comp

Last Answer : Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E. Compound E on furhter ... . Compound F is A. B. C. D.

Resorcinol on distillation with zinc dust gives (a) Benzene (b) Cyclohexane (c) Toluene (d) m-Xylene

Description : Resorcinol on distillation with zinc dust gives (a) Benzene (b) Cyclohexane (c) Toluene (d) m-Xylene

Last Answer : Benzene

Cresols on distillation with zinc dust gives (a) o-Xylene(b) Benzene(c) o- plus p-Xylene(d) Toluene

Description : Cresols on distillation with zinc dust gives (a) o-Xylene (b) Benzene (c) o- plus p-Xylene (d) Toluene

Last Answer : Toluene

Phenol `underset("distillation")overset("Zinc")(rarr)(A)underset("conc."HNO_(3) "at 333K")overset("conc." HNO_(3))(rarr)(B)underset("NaOH")overset(Zn)

Description : Phenol `underset("distillation")overset("Zinc")(rarr)(A)underset("conc."HNO_(3) "at 333K")overset("conc." HNO_(3))(rarr)(B)underset("NaOH")overset(Zn)

Last Answer : Phenol `underset("distillation")overset("Zinc")(rarr)(A)underset("conc."HNO_(3) "at 333K" ... -nitroaniline D. toluene, m-nitrobenzene and m-toulidine

Zinc dust is obtained by

Description : Zinc dust is obtained by

Last Answer : Zinc dust is obtained by A. crushing zinc metal B. Burning zinc metal in air C. Melting zinc and ... with a blast of air D. Roasting zinc sulphide.

How would you separate the mixture of iron dust and zinc dust?

Description : How would you separate the mixture of iron dust and zinc dust?

Last Answer : An electromagnet would attract the iron particles and leave thezinc behind. Tapping or vibrating the electromagnetic would shakeof the zinc and help prevent zinc from clinging with the iron. Onceseparated, turning of the electromagnetic should release the ironparticles from the magnet.

Siderosis is a disease caused by the inhalation of - (1) silica dust (2) iron dust (3) zinc dust (4) coal dust

Description : Siderosis is a disease caused by the inhalation of - (1) silica dust (2) iron dust (3) zinc dust (4) coal dust

Last Answer : (2) iron dust Explanation: Siderosis, also known by the name of Welder's Lung is a pathological condition of the lungs caused by chronic exposure to iron oxide dust, usually at the workplace. Siderosis ... . The condition usually shows up on X-rays as small, opaque spots ori the worker's lungs.

Babbitt metal (used for making bearings) comprises of (A) Mainly tin (85%) and lead (B) Saw dust and iron dust mixture (C) Zinc and aluminium (D) Copper and aluminium

Description : Babbitt metal (used for making bearings) comprises of (A) Mainly tin (85%) and lead (B) Saw dust and iron dust mixture (C) Zinc and aluminium (D) Copper and aluminium

Last Answer : (A) Mainly tin (85%) and lead

How is granular zinc & zinc dust obtained ?

Description : How is granular zinc & zinc dust obtained ?

Last Answer : Ans. Granular zinc is obtained by pouring molten zinc in cold water & zinc dust by melting zinc & then atomising it with blast of air. 

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)

Siderosis is a disease caused by the inhalation of (1) silica dust (2) iron dust (3) zinc dust (4) coal dust

Description : Siderosis is a disease caused by the inhalation of (1) silica dust (2) iron dust (3) zinc dust (4) coal dust

Last Answer :  iron dust

Phenol when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid gives:

Description : Phenol when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid gives:

Last Answer : Phenol when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid gives ... C. nitrobenzene D. 2,4,6-rinitrobenzene

(D) on reaction with phenol under alkaline conditions gives :

Description : (D) on reaction with phenol under alkaline conditions gives :

Last Answer : (D) on reaction with phenol under alkaline conditions gives : A. diazobenzene B. hydrazobenzene C. benzidine D. para hydroxy azobenzene

Phenol reacts with which one of the following reagents gives a conjugate diketone will be formed ?

Description : Phenol reacts with which one of the following reagents gives a conjugate diketone will be formed ?

Last Answer : Phenol reacts with which one of the following reagents gives a conjugate diketone will be formed ? A. `Na_(2)Cr_(2 ... `Na_(2)Cr_(2)O_(7)+H_(2)SO_(4)`

Benzene diazonium chloride on reaction with phenol in a basic medium gives:

Description : Benzene diazonium chloride on reaction with phenol in a basic medium gives:

Last Answer : Benzene diazonium chloride on reaction with phenol in a basic medium gives: A. benzene B. chlorobenzene C. diphenyl ether D. p-hydroxy azobenzene

Phenol on treatment with conc. `HNO_(3)` gives

Description : Phenol on treatment with conc. `HNO_(3)` gives

Last Answer : Phenol on treatment with conc. `HNO_(3)` gives A. picric acid B. o-and m-nitrophenols C. cresol D. resorcinol

When phenol is treated with excess of bromine water, it gives

Description : When phenol is treated with excess of bromine water, it gives

Last Answer : When phenol is treated with excess of bromine water, it gives A. m-bromophenol B. o-and p-bromophenol C. 2, 4-dibromophenol D. 2, 4,6-tribromophenol

Phenol on heating with NaOH followed by reaction with alky1 halide gives

Description : Phenol on heating with NaOH followed by reaction with alky1 halide gives

Last Answer : Phenol on heating with NaOH followed by reaction with alky1 halide gives A. Acetone B. Ether C. Ethonal D. Acetic acid

Anisole on heating with concentrated HI gives (a) Iodobenzene (b) Phenol + CH3I (c) Iodobenzene + CH3OH (d) Phenol + CH3OH

Description : Anisole on heating with concentrated HI gives (a) Iodobenzene (b) Phenol + CH3I (c) Iodobenzene + CH3OH (d) Phenol + CH3OH

Last Answer : Phenol + CH3I

Hydrolysis of benzotrichloride gives (a) Benzophenone (b) Benzoic acid (c) Benzyl alcohol (d) Phenol

Description : Hydrolysis of benzotrichloride gives (a) Benzophenone (b) Benzoic acid (c) Benzyl alcohol (d) Phenol

Last Answer : Benzoic acid

Hydrolysis of benzal chloride gives (a) Phenol (b) Benzaldehyde (c) Benzyl alcohol(d) Benzoyl chloride

Description : Hydrolysis of benzal chloride gives (a) Phenol (b) Benzaldehyde (c) Benzyl alcohol (d) Benzoyl chloride

Last Answer : (d) Benzoyl chloride

_____ gives hardness to stainless steel. (1) Zinc (2) Lead (3) Carbon (4) Tin

Description : _____ gives hardness to stainless steel. (1) Zinc (2) Lead (3) Carbon (4) Tin

Last Answer : (3) Carbon Explanation: Iron is alloyed with carbon to make steel and has the effect of increasing the hardness and strength of iron.

______ gives hardness to stainless steel. (1) Zinc (2) Lead (3) Carbon (4) Tin

Description : ______ gives hardness to stainless steel. (1) Zinc (2) Lead (3) Carbon (4) Tin

Last Answer : (3) Carbon Explanation: Iron is alloyed with carbon lo make steel and has the effect of increasing the hardness and strength of iron. Pure iron cannot be hardened or strengthened by heat treatment but ... .3% carbon. The higher the carbon content, the less formable and the tougher the steel becomes.

_____ gives hardness to stainless steel. (1) Zinc (2) Lead (3) Carbon (4) Tin

Description : _____ gives hardness to stainless steel. (1) Zinc (2) Lead (3) Carbon (4) Tin

Last Answer : Carbon

What are the chemical signals of phenol ?

Description : What are the chemical signals of phenol ?

Last Answer : Fennel signal C6H5-OH ...

Phenol and benzoic acid can not be separated by

Description : Phenol and benzoic acid can not be separated by

Last Answer : Phenol and benzoic acid can not be separated by A. `NaHCO_(3)` B. `NaOH` C. Na D. `NaNH_(2)`

Phenol on treatment with `CO_(2)` in the presence of `NaOH` followed by acidification produces compound X as the major product. X on treatment with `(

Description : Phenol on treatment with `CO_(2)` in the presence of `NaOH` followed by acidification produces compound X as the major product. X on treatment with `(

Last Answer : Phenol on treatment with `CO_(2)` in the presence of `NaOH` followed by acidification produces compound X as the ... `H_(2)SO_(4)` produces B. C. D.

Phenol is heated with a solution of mixture of `KBr` and `KBrO_(3)`. The major product obtained in the above reaction is

Description : Phenol is heated with a solution of mixture of `KBr` and `KBrO_(3)`. The major product obtained in the above reaction is

Last Answer : Phenol is heated with a solution of mixture of `KBr` and `KBrO_(3)`. The major product ... Bromophenol C. 4-Bromophenol D. 2,4,6-Tribromophenol

The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is :

Description : The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is :

Last Answer : The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is : A ... acid C. phthalic acid D. benzoic acid

Phenol reacts with methyl chloroformate in the presence of `NaOH` to form product A. A reacts with `Br_(2)` to form product B. A and B are respectivel

Description : Phenol reacts with methyl chloroformate in the presence of `NaOH` to form product A. A reacts with `Br_(2)` to form product B. A and B are respectivel

Last Answer : Phenol reacts with methyl chloroformate in the presence of `NaOH` to form product A. A reacts with `Br_(2)` ... A and B are respectively A. B. C. D.

Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electroph

Description : Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electroph

Last Answer : Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. ... (I) is: A. B. C. D.

Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electroph

Description : Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electroph

Last Answer : Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This ... (2)` D. `.^(*)C Cl_(3)`

Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electroph

Description : Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electroph

Last Answer : Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. ... ` D. aq. `NaOH + C Cl_(4)`

In which of the following reactions phenol is not obtained :

Description : In which of the following reactions phenol is not obtained :

Last Answer : In which of the following reactions phenol is not obtained : A. B. C. D.

A solution contains 1g mol. Each of p-toluene diazonium chloride and p-nitrophenyl diazonium cholride. To this 1g mol.of alkaline solution of phenol i

Description : A solution contains 1g mol. Each of p-toluene diazonium chloride and p-nitrophenyl diazonium cholride. To this 1g mol.of alkaline solution of phenol i

Last Answer : A solution contains 1g mol. Each of p-toluene diazonium chloride and p-nitrophenyl diazonium ... Predict the major product. Explain your answer.

When phenol reactes with `CHCl_(3)` and NaOH followed by acidification, salicyladehyde is obtained. Which of the following species are involed in the

Description : When phenol reactes with `CHCl_(3)` and NaOH followed by acidification, salicyladehyde is obtained. Which of the following species are involed in the

Last Answer : When phenol reactes with `CHCl_(3)` and NaOH followed by acidification, salicyladehyde is obtained. Which of ... as intermediates ? A. B. C. D.

In the reaction of phenol with `CHCl_(3)` and aqueous `NaOH` at `70^(@)`, the electrophile attacking the ring is:

Description : In the reaction of phenol with `CHCl_(3)` and aqueous `NaOH` at `70^(@)`, the electrophile attacking the ring is:

Last Answer : In the reaction of phenol with `CHCl_(3)` and aqueous `NaOH` at `70^(@)`, the electrophile attacking the ring is: ... ` C. `:"CCl"_(2)` D. `COCl_(2)`

In the following compounds phenol (I), p-cresol (II), m-nitrophenol (III) and p-nitrophenol (IV), the order of acidity is:

Description : In the following compounds phenol (I), p-cresol (II), m-nitrophenol (III) and p-nitrophenol (IV), the order of acidity is:

Last Answer : In the following compounds phenol (I), p-cresol (II), m-nitrophenol (III) and p- ... `IgtIVgtIIIgtII` C. `IIgtIgtIIIgtIV` D. `IVgtIIIgtIgtII`

Reimer-Tiemann reaction of phenol with cholorform and aqueous alkali takes place through the intermediate formation of:

Description : Reimer-Tiemann reaction of phenol with cholorform and aqueous alkali takes place through the intermediate formation of:

Last Answer : Reimer-Tiemann reaction of phenol with cholorform and aqueous alkali takes place through the ... carbanions C. carbon radicals D. carbenes

The bakelite is made from phenol and formaldehyde. The initial reaction between the two compounds is an exmaple of:

Description : The bakelite is made from phenol and formaldehyde. The initial reaction between the two compounds is an exmaple of:

Last Answer : The bakelite is made from phenol and formaldehyde. The initial reaction between the two compounds is ... C. free radical reaction D. aldol reaction

Bakelinte is obtained from phenol by reacting with:

Description : Bakelinte is obtained from phenol by reacting with:

Last Answer : Bakelinte is obtained from phenol by reacting with: A. acetaldehyde B. acetal C. formaldehyde D. cholrobenzene

Consider the following diazonium ion: The order of reactivity towards diazo coupling with phenol in presence of dil. NaOH:

Description : Consider the following diazonium ion: The order of reactivity towards diazo coupling with phenol in presence of dil. NaOH:

Last Answer : Consider the following diazonium ion: The order of reactivity towards diazo coupling with phenol in presence of dil. NaOH ... ` D. `S gt R gt Q gt P`

Assertion : Phenol has lower boiling point then water Reason : Water forms more number of hydrogen bonds

Description : Assertion : Phenol has lower boiling point then water Reason : Water forms more number of hydrogen bonds

Last Answer : Assertion : Phenol has lower boiling point then water Reason : Water forms more number of hydrogen ... false D. Assertion is false, Reason is true

Phenol when condensed with phthalic anhydride in the presence of conc. `H_(2)SO_(4)`, yields `,`

Description : Phenol when condensed with phthalic anhydride in the presence of conc. `H_(2)SO_(4)`, yields `,`

Last Answer : Phenol when condensed with phthalic anhydride in the presence of conc. `H_(2)SO_(4)`, yields ... orange B. Phenolphthaline C. Aspirin D. Methyl Blue

Howmany of the following compounds are dissolve in aqeous solution of `NaOH` (1) Phenol (2) p-cresol (3) Benzoic acid (4) Benzene sulphonic acid (5) A

Description : Howmany of the following compounds are dissolve in aqeous solution of `NaOH` (1) Phenol (2) p-cresol (3) Benzoic acid (4) Benzene sulphonic acid (5) A

Last Answer : Howmany of the following compounds are dissolve in aqeous solution of `NaOH` (1) Phenol (2) p-cresol ... P-toluedine (7) Picric acid (8) Squaric acid

Howmany of the following compounds are dissolve in aqeous solution of `NaOH` (i) Phenol (ii) Cyclohexanol (iii) 2, 4-di nitro phenol (iv) Benzoic (v)

Description : Howmany of the following compounds are dissolve in aqeous solution of `NaOH` (i) Phenol (ii) Cyclohexanol (iii) 2, 4-di nitro phenol (iv) Benzoic (v)

Last Answer : Howmany of the following compounds are dissolve in aqeous solution of `NaOH` (i) Phenol (ii) ... ) `alpha-` naphthol (ix) N-methyl aniline

Statement-1 : Para chloro phenol is more acidic than para flouro phenol. Statement-2 : negative inductive Effect if flourine is greater than in chlori

Description : Statement-1 : Para chloro phenol is more acidic than para flouro phenol. Statement-2 : negative inductive Effect if flourine is greater than in chlori

Last Answer : Statement-1 : Para chloro phenol is more acidic than para flouro phenol. Statement-2 : negative ... . Statement-1 is false, Statement-2 is true

Phenol is heated with a solution of mixture of `KBr` and `KBrO_(3)`. The major product obtained in the above reaction is

Description : Phenol is heated with a solution of mixture of `KBr` and `KBrO_(3)`. The major product obtained in the above reaction is

Last Answer : Phenol is heated with a solution of mixture of `KBr` and `KBrO_(3)`. The major product obtained ... C. 4-Bromophenol D. 2, 4,6-Tribromophenol