'Red Ink' is prepared from - (1) Phenol (2) Aniline (3) Congo redd (4) Eosin

'Red Ink' is prepared from - (1) Phenol (2) Aniline (3) Congo redd (4) Eosin
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(4) Eosin Explanation: Eosin is a dye used to prepare red ink. Eosin Y is a xanthene dye and is used for the differential staining of connective tissue and cytoplasm.
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Pick out the wrong statement. (A) Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action (B) Soap powder is prepared by mixing soap with hydrated sodium carbonate (C) Detergents differ from soaps in their action in hard water (D) Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

Description : Pick out the wrong statement. (A) Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action (B) Soap powder is ... ., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

Last Answer : (D) Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

Benzenediazonium chloride reacts with hypophosphorus acid to form : (a) Phenol (b) Benzaldehyde (c) Aniline (d) Benzene

Description : Benzenediazonium chloride reacts with hypophosphorus acid to form : (a) Phenol (b) Benzaldehyde (c) Aniline (d) Benzene

Last Answer : Benzene

Benzenediazonium chloride reacts with warm water to give (a) Aniline (b) Phenol (c) Benzene (d) Chlorobenzene

Description : Benzenediazonium chloride reacts with warm water to give (a) Aniline (b) Phenol (c) Benzene (d) Chlorobenzene

Last Answer : Phenol

Aniline undergoes oxidation with Na2Cr2O7/H2SO4 to give (a) Schiff's base (b) p-Benzoquinone (c) Phenol (d) Benzoic acid

Description : Aniline undergoes oxidation with Na2Cr2O7/H2SO4 to give (a) Schiff's base (b) p-Benzoquinone (c) Phenol (d) Benzoic acid

Last Answer : p-Benzoquinone

Chlorobenzene can be prepared by treatment of aniline with (a) Cuprous chloride (b) Chlorine in the presence of UV light (c) Nitrous acid followed by treatment with CuCl (d) Chlorine in the presence of FeCl3

Description : Chlorobenzene can be prepared by treatment of aniline with (a) Cuprous chloride (b) Chlorine in the presence of UV light (c) Nitrous acid followed by treatment with CuCl (d) Chlorine in the presence of FeCl3

Last Answer : Nitrous acid followed by treatment with CuCl

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

Aniline is prepared by (a) the reaction of benzene with ammonia (b) the reduction of nitrobenzene with Sn/HCl (c) the dehydrogenation of nitrobenzene (d) the reaction of nitrobenzene with I2/NaOH

Description : Aniline is prepared by (a) the reaction of benzene with ammonia (b) the reduction of nitrobenzene with Sn/HCl (c) the dehydrogenation of nitrobenzene (d) the reaction of nitrobenzene with I2/NaOH

Last Answer : the reduction of nitrobenzene with Sn/HCl

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

How old is trippie redd?

Description : How old is trippie redd?

Last Answer : 21 in 2020

Iodobenzene can be prepared by (a) treating chlorobenzene with I2 using FeCl3 catalyst. (b) treating phenol with I2 in NaOH solution. (c) treating benzenediazonium chloride with KI (d) treating benzene with CH3I using AlCl3 catalyst

Description : Iodobenzene can be prepared by (a) treating chlorobenzene with I2 using FeCl3 catalyst. (b) treating phenol with I2 in NaOH solution. (c) treating benzenediazonium chloride with KI (d) treating benzene with CH3I using AlCl3 catalyst

Last Answer : treating benzenediazonium chloride with KI

p-bromoaniline is prepared from aniline via

Description : p-bromoaniline is prepared from aniline via

Last Answer : p-bromoaniline is prepared from aniline via A. direct bromination of aniline in presence of Lewis ... in presence of light D. amination of bromine

Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins. (A) Epoxy (B) Phenol formaldehyde (C) Urea formaldehyde (D) Melamine formaldehyde

Description : Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins. (A) Epoxy (B) Phenol formaldehyde (C) Urea formaldehyde (D) Melamine formaldehyde

Last Answer : (C) Urea formaldehyde

Pick up the correct statement from the following: (A) The phenol is carbolic acid (B) The phenol is either extracted from coal-tar or prepared from benzene (C) Phenol reacts with formaldehyde, to form phenol formaldehyde resin (D) All the above

Description : Pick up the correct statement from the following: (A) The phenol is carbolic acid (B) The phenol is either extracted from coal-tar or prepared from benzene (C) Phenol reacts with formaldehyde, to form phenol formaldehyde resin (D) All the above

Last Answer : Answer: Option D

Chemical name of Gammaxane is - (1) Toluene (2) Chloro benzene (3) Aniline (4) Benzene hexachloride

Description : Chemical name of Gammaxane is - (1) Toluene (2) Chloro benzene (3) Aniline (4) Benzene hexachloride

Last Answer : (4) Benzene hexachloride Explanation: Gammexane is an insecticide that is the gamma isomer of benzene hexachloride. It is also known as lindane. Benzene hexachloride is any of several stereoisomers of 1,2,3,4,5,6- hexachlorocyclohexane formed by the lightinduced addition of chlorine to benzene.

Polythene is polymer of – (1) Ethylene (2) Propylene (3) Acetylene (4) Aniline

Description : Polythene is polymer of – (1) Ethylene (2) Propylene (3) Acetylene (4) Aniline

Last Answer : (1) Ethylene Explanation: The ingredient or monomer is ethylene (IUPAC name ethene). It has the formula C2H4, consisting of a pair of CH2 groups connected by a double bond. Because the catalysts are highly reactive, the ethylene must be of high purity. Typical specifications are H2SO4

Which of the following is a natural dye? (1) Crystal violet (2) Aniline blue (3) Alizarin (4) Phenolphthalein

Description : Which of the following is a natural dye? (1) Crystal violet (2) Aniline blue (3) Alizarin (4) Phenolphthalein

Last Answer : (3) Alizarin Explanation: Alizarin or 1,2- dihydroxyanthraquinone (also known as Mordant Red 11 and Turkey Red is an organic compound with formula C14H8O4 that has been used throughout history as a ... of the madder genus. In 1869, it became the first natural pigment to be duplicated synthetically.

By which method aniline can be purified?

Description : By which method aniline can be purified?

Last Answer : By steam distillation.

How is aniline distinguished from N-methyl aniline ?

Description : How is aniline distinguished from N-methyl aniline ?

Last Answer : Ans.—On adding CHCl3 & KOH , aniline gives offensive smell forming isocyanide compound whereas N-methyle aniline not.

How can tri substitution of Bromine be prevented in aniline ? OR How can we prepare mono bromo aniline ?

Description : How can tri substitution of Bromine be prevented in aniline ? OR How can we prepare mono bromo aniline ?

Last Answer : Because of high reactivity of aromatic amines substitution tends to occur at o- and ppositions. Monosubstituted aniline can be prepared by protecting — NH2 group by acetylation with acetic anhydride, then carrying out substitution followed by hydrolysis of substituted amide.

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.

Pkb of aniline is more than that of methyl amine.

Description : Pkb of aniline is more than that of methyl amine.

Last Answer : In aniline, the lone pair of electrons on the N-atom are delocalized over the benzene ring. As a result electron density on the nitrogen decreases. In contrast in CH2NH2 , + I effect of CH3 ... , aniline is a weaker base than methylamine and hence its Pkb value is higher than that of methylamine.

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

Which of the following are optimum temperature conditions for making benzenediazonium chloride from aniline? (a) 0°C to 10°C (b) 20°C to 25°C (c) 30°C to 40°C (d) 45°C to 50°C

Description : Which of the following are optimum temperature conditions for making benzenediazonium chloride from aniline? (a) 0°C to 10°C (b) 20°C to 25°C (c) 30°C to 40°C (d) 45°C to 50°C

Last Answer : 0°C to 10°C

Which of the following reagents is used to prepare benzenediazoniumchloride from aniline?(a) NaNO2 + HCl(b) LiAlH4(c) NH2NH2 + KOH(d) NaOH

Description : Which of the following reagents is used to prepare benzenediazonium chloride from aniline? (a) NaNO2 + HCl (b) LiAlH4 (c) NH2NH2 + KOH (d) NaOH

Last Answer : NaNO2 + HCl

Which of the following compounds is most basic? (a) Aniline (b) Benzylamine (c) Acetanilide (d) p-nitroaniline

Description : Which of the following compounds is most basic? (a) Aniline (b) Benzylamine (c) Acetanilide (d) p-nitroaniline

Last Answer : Benzylamine

Which of the following reagents does not react with aniline? (a) Acetyl chloride (b) Acetic anhydride (c) Ammonia (d) Nitrous acid

Description : Which of the following reagents does not react with aniline? (a) Acetyl chloride (b) Acetic anhydride (c) Ammonia (d) Nitrous acid

Last Answer : Ammonia

Aniline reacts with acetic anhydride to give : (a) N-Methylaniline (b) p-Aminoacetophenone (c) Acetanilide (d) m-Aminoacetophenone

Description : Aniline reacts with acetic anhydride to give : (a) N-Methylaniline (b) p-Aminoacetophenone (c) Acetanilide (d) m-Aminoacetophenone

Last Answer : Acetanilide

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

Aniline reacts with nitrous acid at low temperatures to give (a) a N-nitrosoamine (b) a nitrile (c) a diazonium salt (d) a nitrite salt

Description : Aniline reacts with nitrous acid at low temperatures to give (a) a N-nitrosoamine (b) a nitrile (c) a diazonium salt (d) a nitrite salt

Last Answer : a diazonium salt

Which of the following will give a precipitate with excess bromine water? (a) Bromobenzene (b) Aniline (c) Nitrobenzene (d) Toluene

Description : Which of the following will give a precipitate with excess bromine water? (a) Bromobenzene (b) Aniline (c) Nitrobenzene (d) Toluene

Last Answer : Aniline

Aniline reacts with bromine water to form (a) Bromobenzene (b) m-Bromoaniline (c) 2,4,6-Tribromoaniline (d) o- plus p-Bromoaniline

Description : Aniline reacts with bromine water to form (a) Bromobenzene (b) m-Bromoaniline (c) 2,4,6-Tribromoaniline (d) o- plus p-Bromoaniline

Last Answer : 2,4,6-Tribromoaniline

Benzamide reacts with Br2 and KOH to give (a) Benzene (b) Benzylamine (c) Aniline (d) Benzonitrile

Description : Benzamide reacts with Br2 and KOH to give (a) Benzene (b) Benzylamine (c) Aniline (d) Benzonitrile

Last Answer : Benzylamine

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.

Nitrobenzene undergoes reduction with zinc and KOH to give (a) Aniline (b) Hydrazobenzene (c) Azobenzene (d) None of these

Description : Nitrobenzene undergoes reduction with zinc and KOH to give (a) Aniline (b) Hydrazobenzene (c) Azobenzene (d) None of these

Last Answer : Hydrazobenzene

Which of the following statements is False/Incorrect about nitrobenzene? (a) is formed by nitration of benzene at temperatures below 60°C. (b) can be further nitrated to give m-dinitrobenzene. (c) can be oxidized with KMnO4 to give benzoic acid. (d) can be reduced with Sn/HCl to give aniline.

Description : Which of the following statements is False/Incorrect about nitrobenzene? (a) is formed by nitration of benzene at temperatures below 60°C. (b) can be further nitrated to give m-dinitrobenzene. (c) can be oxidized with KMnO4 to give benzoic acid. (d) can be reduced with Sn/HCl to give aniline.

Last Answer : can be oxidized with KMnO4 to give benzoic acid

Which of the following compounds does not react with acetyl chloride? (a) Methylamine (b) Dimethylamine (c) Aniline (d) Trimethylamine

Description : Which of the following compounds does not react with acetyl chloride? (a) Methylamine (b) Dimethylamine (c) Aniline (d) Trimethylamine

Last Answer : Trimethylamine

Which of the following is least soluble in water? (a) Methylamine (b) Trimethylamine (c) Dimethylamine (d) Aniline

Description : Which of the following is least soluble in water? (a) Methylamine (b) Trimethylamine (c) Dimethylamine (d) Aniline

Last Answer : Methylamine

Which of the following compounds does not dissolve in concentrated H2SO4 on warming? (a) n-Hexane (b) Diethyl ether (c) 1-Butene (d) Aniline

Description : Which of the following compounds does not dissolve in concentrated H2SO4 on warming? (a) n-Hexane (b) Diethyl ether (c) 1-Butene (d) Aniline

Last Answer : n-Hexane

Chemical name of Gammaxane is (1) Toluene (2) Chloro benzene (3) Aniline (4) Benzene hexachloride

Description : Chemical name of Gammaxane is (1) Toluene (2) Chloro benzene (3) Aniline (4) Benzene hexachloride

Last Answer : Benzene hexachloride

Polythene is polymer of (1) Ethylene (2) Propylene (3) Acetylene (4) Aniline

Description : Polythene is polymer of (1) Ethylene (2) Propylene (3) Acetylene (4) Aniline

Last Answer : Ethylene

Which of the following is a natural dye ? (1) Crystal violet (2) Aniline blue (3) Alizarin (4) Phenolphthalein

Description : Which of the following is a natural dye ? (1) Crystal violet (2) Aniline blue (3) Alizarin (4) Phenolphthalein

Last Answer : Alizarin

What should be done about rape in the Congo?

Description : What should be done about rape in the Congo?

Last Answer : answer:Arm the women? The mass organized rapes are largely a component of warfare. Let the women fight back.

After the Berlin conference, how did King Leopold gain territory in The Congo?

Description : After the Berlin conference, how did King Leopold gain territory in The Congo?

Last Answer : By fiat declaration per this wikipedia article

What was the Congo like before colonization?

Description : What was the Congo like before colonization?

Last Answer : Other than an undeveloped jungle, it was part of the Arab slave trade network for about 700 years. The infrastructure of blacks selling blacks was so well developed in the Congo, that the Europeans simply took it over and continued it after the Arabs left.

What is the currency of 'Congo, Democratic Republic of the' ? -General Knowledge

Description : What is the currency of 'Congo, Democratic Republic of the' ? -General Knowledge

Last Answer : The currency of 'Congo, Democratic Republic of the' is called Franc Congolais

What is the currency of 'Congo' ? -General Knowledge

Description : What is the currency of 'Congo' ? -General Knowledge

Last Answer : The currency of 'Congo' is called CFA Franc BEAC ‡

Which is the capital of Congo?

Description : Which is the capital of Congo?

Last Answer : Answer: Kinshasa.

Of whose empire was Congo once a part?

Description : Of whose empire was Congo once a part?

Last Answer : Answer: Belgium.

Belgian Congo is now called:

Description : Belgian Congo is now called:

Last Answer : Answer: Democratic Republic of the Congo.