Aniline when diazotized in cold and then treated with dimethyl aniline gives a coloured product. Its structure would be

Aniline when diazotized in cold and then treated with dimethyl aniline gives a coloured product. Its structure would be
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Aniline when diazotized in cold and then treated with dimethyl aniline gives a coloured product. Its structure would be A. B. C. D.
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Which of the following statements is correct about aniline? (a) is weak acid. (b) diazotizes to benzenediazonium chloride when treated with ice-cold nitrous acid. (c) can be nitrated with concentrated HNO3 to form p-nitroaniline. (d) gives an intense green color with a suspension of bleaching powder in water

Description : Which of the following statements is correct about aniline? (a) is weak acid. (b) diazotizes to benzenediazonium chloride when treated with ice-cold nitrous acid. (c) can be nitrated with ... p-nitroaniline. (d) gives an intense green color with a suspension of bleaching powder in water

Last Answer : diazotizes to benzenediazonium chloride when treated with ice-cold nitrous acid.

Aniline gets coloured on standing in air for a long time. Why ?

Description : Aniline gets coloured on standing in air for a long time. Why ?

Last Answer : Due to strong electron-donating effect (+ R effect) of NH2 gp, the electron density on the benzene ring increases. As a result, aniline is easily oxidised on standing in air for a long time to form coloured products.

Chloroform when treated aniline and alcoholic KOH, the product formed is?

Description : Chloroform when treated aniline and alcoholic KOH, the product formed is?

Last Answer : Chloroform when treated aniline and alcoholic KOH, the product formed is? A. Phenyl cyanide B. Phenyl isocyanide C. Chlorobenzene D. Phenol

Aniline when treated acetyl chlroide in presence of alkali, the product formed is:

Description : Aniline when treated acetyl chlroide in presence of alkali, the product formed is:

Last Answer : Aniline when treated acetyl chlroide in presence of alkali, the product formed is: A. ... benzoyl chloride C. acetophenone D. aniline hydrochloride

A hydrocarbon, C6H12, on ozonolysis gives only one product which does not give silver mirror with Tollens' reagent. The hydrocarbon is (a) 2,3-Dimethyl-2-butene (b) 2-Hexene (c) 2-Methyl-2-pentene (d) 3-Hexene

Description : A hydrocarbon, C6H12, on ozonolysis gives only one product which does not give silver mirror with Tollens' reagent. The hydrocarbon is (a) 2,3-Dimethyl-2-butene (b) 2-Hexene (c) 2-Methyl-2-pentene (d) 3-Hexene

Last Answer : 2,3-Dimethyl-2-butene

CONDENSED STRUCTURE OF THE FOLLOWING1. 5,5 – diethyl – 3,3 – dimethyl – 1 - octyne2. 2,4,4,6 – tetraethyl – 3,3 – nondiene3. 1,1,4,4 – tetramethylheptaneIDENTIFY IF ITS ALKANE ALKYNE ALKENE?

Description : CONDENSED STRUCTURE OF THE FOLLOWING1. 5,5 – diethyl – 3,3 – dimethyl – 1 - octyne2. 2,4,4,6 – tetraethyl – 3,3 – nondiene3. 1,1,4,4 – tetramethylheptaneIDENTIFY IF ITS ALKANE ALKYNE ALKENE?

Last Answer : ℤ.

Para toluidine is treated with `HNO_(2)` at ice cold conditions and then boiled with water. The final product obtained is :

Description : Para toluidine is treated with `HNO_(2)` at ice cold conditions and then boiled with water. The final product obtained is :

Last Answer : Para toluidine is treated with `HNO_(2)` at ice cold conditions and then boiled with water. The final ... acid B. p-cresol C. toluic acid D. phenol

Although — NH2 gp is an ortho and para directing gp, nitration of aniline gives along with ortho and para, meta derivatives also.

Description : Although — NH2 gp is an ortho and para directing gp, nitration of aniline gives along with ortho and para, meta derivatives also.

Last Answer : Nitration is carried out with a mixture of Conc. NO3 + Conc. H2 SO4 (nitrating mix). In the presence of these acids, most of aniline gets protonated to form anilinium ion. Therefore, in the ... is m-directing and deactivating hence a mixture of all three-ortho, para and meta derivatives is formed.

When aniline is heated with glycerol in the presence of sulfuric acid and nitrobenzene, it gives quinoline. This reaction in called (a) Fischer synthesis (b) Skraup synthesis (c) Diazotization (d) Corey-House synthesis

Description : When aniline is heated with glycerol in the presence of sulfuric acid and nitrobenzene, it gives quinoline. This reaction in called (a) Fischer synthesis (b) Skraup synthesis (c) Diazotization (d) Corey-House synthesis

Last Answer : Skraup synthesis

Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` and `NH_(4)Cl` gives an octahedral complex Y in the pre

Description : Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` and `NH_(4)Cl` gives an octahedral complex Y in the pre

Last Answer : Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` ... solution is pink D. Z is a tetrahedral complex.

A mixture of two organic compound gives red coloured precipitate with cuprous chloride and silver mirror on heating with Zn and `NH_(4)Cl` followed by

Description : A mixture of two organic compound gives red coloured precipitate with cuprous chloride and silver mirror on heating with Zn and `NH_(4)Cl` followed by

Last Answer : A mixture of two organic compound gives red coloured precipitate with cuprous chloride and silver mirror on heating ... mixture contains : A. B. C. D.

A green coloured solid compound ̳X‘, gets oxidized to reddish brown solid in presence of air. ̳X‘ on heating gives brown coloured solid ̳Y‘ and two pungent smelling gases ̳A‘ and ̳B‘. ̳A‘ turns acidified potassium dichromate solution green. Name ̳X‘, ̳Y‘, ̳A‘ , ̳B‘ and type of Reaction. (a) CuSO 4 , CuO, SO 2 , SO 3 , decomposition (b) FeSO 4 , Fe, SO 2 , SO 3 , decomposition (c) FeSO 4 , Fe 2 O 3, SO 2 , SO 3 , decomposition (d) FeSO 4 , Fe 2 O 3 , SO 3 , SO 2 , decomposition

Description : A green coloured solid compound ̳X , gets oxidized to reddish brown solid in presence of air. ̳X on heating gives brown coloured solid ̳Y and two pungent smelling gases ̳A and ̳B . ̳A turns acidified potassium ... , SO 3 , decomposition (d) FeSO 4 , Fe 2 O 3 , SO 3 , SO 2 , decomposition

Last Answer : (c) FeSO 4 , Fe 2 O 3, SO 2 , SO 3 , decomposition

Which of the following statements is false about aniline? (a) It is a primary aromatic amine. (b) It is a weak base which forms salts with acids. (c) It liberates nitrogen on treatment with ice-cold nitrous acid. (d) It can be prepared by the reduction of nitrobenzene with tin and HCl

Description : Which of the following statements is false about aniline? (a) It is a primary aromatic amine. (b) It is a weak base which forms salts with acids. (c) It liberates nitrogen on treatment with ice-cold nitrous acid. (d) It can be prepared by the reduction of nitrobenzene with tin and HCl

Last Answer : It liberates nitrogen on treatment with ice-cold nitrous acid

In cold countries alcohol is preferred to mercury as a thermometric liquid because (a) alcohol is a better conductor of heat (b) alcohol can be coloured and its level seen easily (c) alcohol has a lower freezing point than mercury (d) alcohol is cheaper than mercury

Description : In cold countries alcohol is preferred to mercury as a thermometric liquid because (a) alcohol is a better conductor of heat (b) alcohol can be coloured and its level seen easily (c) alcohol has a lower freezing point than mercury (d) alcohol is cheaper than mercury

Last Answer : Ans:(c)

Dacron is a (A) Condensation polymerisation product of Hexamethylene diamine and adipic acid (B) Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol (C) Thermosetting material (D) None of these

Description : Dacron is a (A) Condensation polymerisation product of Hexamethylene diamine and adipic acid (B) Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol (C) Thermosetting material (D) None of these

Last Answer : (D) None of these

Which of the following alkenes reacts with HBr in the presence of a peroxide to give anti-Markovnikov's product? (a) 1-Butene (b) 2,3-Dimethyl-2-butene (c) 2-Butene (d) 3-Hexene

Description : Which of the following alkenes reacts with HBr in the presence of a peroxide to give anti-Markovnikov's product? (a) 1-Butene (b) 2,3-Dimethyl-2-butene (c) 2-Butene (d) 3-Hexene

Last Answer : 1-Butene

Dacron is a (A) Condensation product of Hexamethylene diamine and adipic acid (B) Thermosetting material (C) Condensation product of dimethyl terephthalate and ethylene glycol (D) None of these

Description : Dacron is a (A) Condensation product of Hexamethylene diamine and adipic acid (B) Thermosetting material (C) Condensation product of dimethyl terephthalate and ethylene glycol (D) None of these

Last Answer : (D) None of these

Aniline reacts with mixed acid (conc. `HNO_(3)` and conc. `H_(2)SO_(4)`) at 288 K to give P (51%), Q (47%) and R(2%). The major product (s) of the fol

Description : Aniline reacts with mixed acid (conc. `HNO_(3)` and conc. `H_(2)SO_(4)`) at 288 K to give P (51%), Q (47%) and R(2%). The major product (s) of the fol

Last Answer : Aniline reacts with mixed acid (conc. `HNO_(3)` and conc. `H_(2)SO_(4)`) at 288 K to give P ... of the following reaction sequence is (are) B. C. D.

The major product Y in the following sequence of reaction is: Aniline `overset((i) NaNO_(2)//HCl,273K)underset((ii)CuCN//KCN)to(X) overset((i)"DIBAL-H

Description : The major product Y in the following sequence of reaction is: Aniline `overset((i) NaNO_(2)//HCl,273K)underset((ii)CuCN//KCN)to(X) overset((i)"DIBAL-H

Last Answer : The major product Y in the following sequence of reaction is: Aniline `overset((i) NaNO_(2)//HCl,273K)underset((ii)CuCN ... H_(2)O)to (Y)` A. B. C. D.

When aniline is heated with chloroform and alcoholic KOH, the product is (a) Benzonitrile (b) p-Chloroaniline (c) Phenylisocyanide (d) m-Chloroaniline

Description : When aniline is heated with chloroform and alcoholic KOH, the product is (a) Benzonitrile (b) p-Chloroaniline (c) Phenylisocyanide (d) m-Chloroaniline

Last Answer : Phenylisocyanide

Compound A reacts with Na metal to give B. A also reacts with `PCl_(5)` to give C. B and C reacts with each other to give dimethyl ether. Then A, B an

Description : Compound A reacts with Na metal to give B. A also reacts with `PCl_(5)` to give C. B and C reacts with each other to give dimethyl ether. Then A, B an

Last Answer : Compound A reacts with Na metal to give B. A also reacts with `PCl_(5)` to give C. B and C reacts with each ... )Cl` D. `CH_(3)Cl, CH_(4), CH_(3)OH`

Bromobenzene can be prepared by treating aniline with (a) Conc HBr (b) Br2/FeBr3 (b) CuBr (d) Nitrous acid then CuBr

Description : Bromobenzene can be prepared by treating aniline with (a) Conc HBr (b) Br2/FeBr3 (b) CuBr (d) Nitrous acid then CuBr

Last Answer : Nitrous acid then CuBr

(a) What effect the branching of an alkane has on its melting point? (L-III) (b) Which of the following has highest boiling point?(L-III) (1) 2-methyl pentane. (2) 2, 3-diethyl butane. (3) 2, 2- dimethyl butane.

Description : (a) What effect the branching of an alkane has on its melting point? (L-III) (b) Which of the following has highest boiling point?(L-III) (1) 2-methyl pentane. (2) 2, 3-diethyl butane. (3) 2, 2- dimethyl butane.

Last Answer : Ans.(a) In general conception, as the branching increases packing of the molecules in the crystals becomes less close and have melting point decreases accordingly. (b) As the branching increases, ... attraction decreases and hence the boiling point decreases. So, 2-methyl pentane has highest B.pt.

A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution In which (C) contains oxygen. The mixture

Description : A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution In which (C) contains oxygen. The mixture

Last Answer : A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the ... ) into red colour compound D. (D) All of these

A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution in which (C) contains oxygen. The mixture

Description : A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution in which (C) contains oxygen. The mixture

Last Answer : A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution ... (A) and (B) both D. (D) None of these

A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution In which (C) contains oxygen. The mixture

Description : A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution In which (C) contains oxygen. The mixture

Last Answer : A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in ... orange red spots on starch paper D. (D) None

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

What are the chemical signals of dimethyl ether ?

Last Answer : Chemical signals of dimethyl ether CH3-O-CH3

DCMU, (3,4-dichlorophenyl , 1-dimethyl urea, also called diuron) a potent herbicide , inhibits

Description : DCMU, (3,4-dichlorophenyl , 1-dimethyl urea, also called diuron) a potent herbicide , inhibits

Last Answer : DCMU, (3,4-dichlorophenyl , 1-dimethyl urea, also called diuron) a potent herbicide , inhibits A. ... . Both (1) amd (2) D. oxidative phosphorylation

Which of the following combination of axial & equitorial bonds show Cis or Trans orientation in Dimethyl cyclohexane. (i) 1e, 2e (ii) 1e, 3e (iii) 1e,

Description : Which of the following combination of axial & equitorial bonds show Cis or Trans orientation in Dimethyl cyclohexane. (i) 1e, 2e (ii) 1e, 3e (iii) 1e,

Last Answer : Which of the following combination of axial & equitorial bonds show Cis or Trans orientation in Dimethyl cyclohexane. ... 3a (vi) 1e, 4a (vii) 1a, 3a

Dimethyl glyoxime forms a square planard complex with `Ni^(2+)`. This complex should be

Description : Dimethyl glyoxime forms a square planard complex with `Ni^(2+)`. This complex should be

Last Answer : Dimethyl glyoxime forms a square planard complex with `Ni^(2+)`. This complex should ... paramagnetic having 2 unpaired electrons D. ferromagnetic .

Dimethyl glyoxime forms a square planard complex with `Ni^(2+)`. This complex should be

Description : Dimethyl glyoxime forms a square planard complex with `Ni^(2+)`. This complex should be

Last Answer : Dimethyl glyoxime forms a square planard complex with `Ni^(2+)`. This complex should ... paramagnetic having 2 unpaired electrons D. ferromagnetic .

The effect that makes 2,3-dimethyl-2-butene more stable than 2-butene is :

Description : The effect that makes 2,3-dimethyl-2-butene more stable than 2-butene is :

Last Answer : The effect that makes 2,3-dimethyl-2-butene more stable than 2-butene is : A. hyperconjugation B. reseonce C. steric effect D. inductive effect

If the boiling point of ethanol (molecular weight `= 46`) is `78^@ C`, the boiling point of dimethyl ether (molecular weight `= 46`) is

Description : If the boiling point of ethanol (molecular weight `= 46`) is `78^@ C`, the boiling point of dimethyl ether (molecular weight `= 46`) is

Last Answer : If the boiling point of ethanol (molecular weight `= 46`) is `78^@ C`, the boiling point of dimethyl ether (molecular ... ` C. `86^(@)C` D. `34^(@)C`

3, 3-Dimethyl-2-butanol no reaction with HCl yield mainly

Description : 3, 3-Dimethyl-2-butanol no reaction with HCl yield mainly

Last Answer : 3, 3-Dimethyl-2-butanol no reaction with HCl yield mainly A. 2-Chloro-2, 3-dimethyl butane B. ... -3, 3-dimethylbutane D. 1-Chloro-3, 3-dimethylbutane

2, 4-Dimethyl pentan -3-ol is a

Description : 2, 4-Dimethyl pentan -3-ol is a

Last Answer : 2, 4-Dimethyl pentan -3-ol is a A. primary alcohol B. secondary alcohol C. tertiary alcohol D. dihydric alcohol

Mutations can be caused by (A) Nitrosamine (B) Dimethyl sulphate (C) Acridine (D) All of these

Description : Mutations can be caused by (A) Nitrosamine (B) Dimethyl sulphate (C) Acridine (D) All of these

Last Answer : Answer : D

Reduction of D-ribonucleotides to D-deoxy ribonucleotides in prokaryotes requires (A) 5, 6 dimethyl benzimindazole cobamide (B) Thiredoxin (C) Tetra hydrobiopterin (D) Tetra hydrofolate VITAMINS 131

Description : Reduction of D-ribonucleotides to D-deoxy ribonucleotides in prokaryotes requires (A) 5, 6 dimethyl benzimindazole cobamide (B) Thiredoxin (C) Tetra hydrobiopterin (D) Tetra hydrofolate VITAMINS 131

Last Answer : Answer : A

Reduction of D-ribonucleotides to Ddeoxy ribonucleotides in prokaryotes requires (A) 5, 6 dimethyl benzimidazole cobamide (B) Thioredoxin (C) Tetra hydrobiopterin (D) Tetra hydrofolate

Description : Reduction of D-ribonucleotides to Ddeoxy ribonucleotides in prokaryotes requires (A) 5, 6 dimethyl benzimidazole cobamide (B) Thioredoxin (C) Tetra hydrobiopterin (D) Tetra hydrofolate

Last Answer : Answer : B

Erythromycin contains (A) Dimethyl amino sugar (B) Trimethyl amino sugar (C) Sterol and sugar (D) Glycerol and sugar

Description : Erythromycin contains (A) Dimethyl amino sugar (B) Trimethyl amino sugar (C) Sterol and sugar (D) Glycerol and sugar

Last Answer : A

The compounds responsible for causing “socks” to stink are 1. Butyric acid 2. Dimethyl sulphide 3. 2-Heptanone 4. 2-Nonanone 5. 2-Octanone Which compound(s) is/are present in the “socks stink”? (a) 1, 2, 3, 4 and 5 (b) 1, 3, 4 and 5 (c) 1, 2, 3 and 5 (d) 1, 4 and 5

Description : The compounds responsible for causing “socks” to stink are 1. Butyric acid 2. Dimethyl sulphide 3. 2-Heptanone 4. 2-Nonanone 5. 2-Octanone Which compound(s) is/are present in the “socks stink”? (a) 1, 2, 3, 4 and 5 (b) 1, 3, 4 and 5 (c) 1, 2, 3 and 5 (d) 1, 4 and 5

Last Answer : Ans:(a)

Consider the following statements: 1. Methyl alcohol is added to denature ethyl alcohol. 2. Ethyl alcohol is also called grain alcohol. 3. Ethyl alcohol and dimethyl ether are isomers. 4. Swine flu is a viral disease, The correct statements 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 statements: 1. Methyl alcohol is added to denature ethyl alcohol. 2. Ethyl alcohol is also called grain alcohol. 3. Ethyl alcohol and dimethyl ether are isomers. 4. Swine flu is a viral disease, The correct ... ) 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

Last Answer : Ans:(c)

The compound that has the least value for octane number is – (1) 2-methyl heptane (2) Iso-octane (3) 2,2-dimethyl hexane (4) n-heptane

Description : The compound that has the least value for octane number is – (1) 2-methyl heptane (2) Iso-octane (3) 2,2-dimethyl hexane (4) n-heptane

Last Answer : (4) n-heptane Explanation: Octane rating or octane number is a standard measure of the performance of a motor or aviation fuel. The higher the octane number, the more compression the fuel can withstand. Isooctane (upper) has an octane rating of 100 whereas n-heptane has an octane rating of O.

Which among the following is used in making liquors, medicines and as a fuel in aircrafts? (1) Propyl alcohol (2) Dimethyl alcohol (3) Ethyl alcohol (4) Methyl alcohol

Description : Which among the following is used in making liquors, medicines and as a fuel in aircrafts? (1) Propyl alcohol (2) Dimethyl alcohol (3) Ethyl alcohol (4) Methyl alcohol

Last Answer : (3) Ethyl alcohol Explanation: Ethyl alcohol (C2H5), also known as ethanol, is a member of a class of organic compounds that are given the general name alcohols.

Nylon-66 is manufactured from (A) Adipic acid and Hexamethylene diamine (B) Caprolactam (C) Maleic anhydride and Hexamethylene diamine (D) Dimethyl terephthalate (DMT) and ethylene glycol

Description : Nylon-66 is manufactured from (A) Adipic acid and Hexamethylene diamine (B) Caprolactam (C) Maleic anhydride and Hexamethylene diamine (D) Dimethyl terephthalate (DMT) and ethylene glycol

Last Answer : (A) Adipic acid and Hexamethylene diamine

Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces (A) Nylon-6 (B) Dacron (C) Polyester (D) PVC

Description : Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces (A) Nylon-6 (B) Dacron (C) Polyester (D) PVC

Last Answer : (B) Dacron

Which of the following has highest boiling point and why?(L-II) (a) 2 methylpentane (b) 2,3 dimethyl butane (c) 2,2 dimythylbutane

Description : Which of the following has highest boiling point and why?(L-II) (a) 2 methylpentane (b) 2,3 dimethyl butane (c) 2,2 dimythylbutane

Last Answer : Ans. As the branching increases, surface area decreases. As a result, magnitude of Vander Waals forces of attraction decreases and hence the boiling point decreases. Thus, the overall order of decreasing boiling point is: 2 methylpentane (333k) > 2,3 dimethylbutane (331k) > 2,2 dimethylbutane(323k)

Prominent foul smell of Karnal bunt is due to (A) Trienthyl amine (B) Trimethyl amine (C) Dimethyl amine (D) None

Description : Prominent foul smell of Karnal bunt is due to (A) Trienthyl amine (B) Trimethyl amine (C) Dimethyl amine (D) None

Last Answer : (B) Trimethyl amine

Ethylene glycol reacts with dimethyl terephthalate to form (a) Nylon-6,6 (b) Teflon (c) Dacron (d) Orlon

Description : Ethylene glycol reacts with dimethyl terephthalate to form (a) Nylon-6,6 (b) Teflon (c) Dacron (d) Orlon

Last Answer : Dacron

Bakelite is obtained from : (a) Phenol and formaldehyde (b) Adipic acid and hexamethylene diamine (c) Dimethyl terephthalate and ethylene glycol (d) Neoprene

Description : Bakelite is obtained from : (a) Phenol and formaldehyde (b) Adipic acid and hexamethylene diamine (c) Dimethyl terephthalate and ethylene glycol (d) Neoprene

Last Answer : Phenol and formaldehyde