Fluorination of an aromatic ring is easily accompolished by treating a diazonium salt with `HBF_4`. Which of the following conditions is correct about

Fluorination of an aromatic ring is easily accompolished by treating a diazonium salt with `HBF_4`. Which of the following conditions is correct about
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Fluorination of an aromatic ring is easily accompolished by treating a diazonium salt with `HBF_4`. Which of the ... O //H_(2)O` D. `NaF//Cu`
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When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.

Description : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.

Last Answer : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is ... is formed which can be given as: A. B. C. D.

When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.

Description : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.

Last Answer : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt ... reaction. The final product is A. B. C. D.

When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.

Description : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.

Last Answer : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and ... gt R gt S` D. `S gt R gt Q gt P`

Preparation of a diazonium salt from a primary aromatic amine is known as : (a) Coupling reaction (b) Sandmeyer reaction (c) Diazotization (d) Corey-House synthesis

Description : Preparation of a diazonium salt from a primary aromatic amine is known as : (a) Coupling reaction (b) Sandmeyer reaction (c) Diazotization (d) Corey-House synthesis

Last Answer : Diazotization

The diazonium salts are the reaction products of the reaction of nitrous acid with (a) primary aliphatic amines (b) primary aromatic amines (c) secondary aliphatic amines (d) secondary aromatic amines

Description : The diazonium salts are the reaction products of the reaction of nitrous acid with (a) primary aliphatic amines (b) primary aromatic amines (c) secondary aliphatic amines (d) secondary aromatic amines

Last Answer : primary aromatic amines

Lassaigne’s test is not shown by diazonium Salt. Why?

Description : Lassaigne’s test is not shown by diazonium Salt. Why?

Last Answer : On heating diazonium Salts loses Nitrogen and could not fuse with the sodium metal therefore diazonium salt do not show Positive Lassaigne’s test for nitrogen.

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

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)`

The `-NO_(2)` group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When `-NO_(2)` group is present at ortho

Description : The `-NO_(2)` group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When `-NO_(2)` group is present at ortho

Last Answer : The `-NO_(2)` group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When ` ... product (I) is : A. B. C. D.

The `-NO_(2)` group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When `-NO_(2)` group is present at ortho

Description : The `-NO_(2)` group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When `-NO_(2)` group is present at ortho

Last Answer : The `-NO_(2)` group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When ` ... product (H) is : A. B. C. D.

The `-NO_(2)` group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When `-NO_(2)` group is present at ortho

Description : The `-NO_(2)` group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When `-NO_(2)` group is present at ortho

Last Answer : The `-NO_(2)` group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When ` ... product (G) is : A. B. C. D.

A major structural difference between estrogens and androgens is the fact that (A) The androgens are usually C21 steroids (B) The estrogens are usually digitonin - precipitable (C) The androgens have an aromatic ring (D) The estrogens have an aromatic ring

Description : A major structural difference between estrogens and androgens is the fact that (A) The androgens are usually C21 steroids (B) The estrogens are usually digitonin - precipitable (C) The androgens have an aromatic ring (D) The estrogens have an aromatic ring

Last Answer : Answer : D

Which of one ring in the structure of the following is aromatic? (A) Androgens (B) Estrogens (C) Cholesterol (D) Bile acids

Description : Which of one ring in the structure of the following is aromatic? (A) Androgens (B) Estrogens (C) Cholesterol (D) Bile acids

Last Answer : Answer : B

A coenzyme containing aromatic hetero ring is (A) TPP (B) Lipoic acid (C) Coenzyme Q (D) Biotin

Description : A coenzyme containing aromatic hetero ring is (A) TPP (B) Lipoic acid (C) Coenzyme Q (D) Biotin

Last Answer : Answer : A

A coenzyme containing non aromatic hetero ring is (A) ATP (B) NAD (C) FMN (D) Biotin

Description : A coenzyme containing non aromatic hetero ring is (A) ATP (B) NAD (C) FMN (D) Biotin

Last Answer : Answer : D

Cyclohexane does not belong to aromatic class even though it has a ring structure. How do you justify this?

Description : Cyclohexane does not belong to aromatic class even though it has a ring structure. How do you justify this?

Last Answer : Cyclohexane is a saturated hydrocarbon in which the carbon atoms are joined by single covalent bonds to form a ring where as in aromatic hydrocarbons have alternate single and double bonds. Hence Cyclohexane is does not belong to aromatic class.

Soap is (a) a mixture of salts of fatty acids (b) a salt of glycerol (c) a mixture of ethers (d) a mixture of aromatic ethers

Description : Soap is (a) a mixture of salts of fatty acids (b) a salt of glycerol (c) a mixture of ethers (d) a mixture of aromatic ethers

Last Answer : a mixture of salts of fatty acids

Raschig ring made of porcelain cannot be used for treating concentrated (A) Hydrochloric acid (B) Nitric acid (C) Alkalis (D) Sulphuric acid

Description : Raschig ring made of porcelain cannot be used for treating concentrated (A) Hydrochloric acid (B) Nitric acid (C) Alkalis (D) Sulphuric acid

Last Answer : (C) Alkalis

Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and gas evolved Y (a). X- Sulphuric acid and Y- Oxygen gas (b). X- Hydrochloric acid and Y- Oxygen gas (c). X- Sulphuric acid and Y- Hydrogen gas (d). X- Hydrochloric acid and Y- Hydrogen gas

Description : Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and ... (c). X- Sulphuric acid and Y- Hydrogen gas (d). X- Hydrochloric acid and Y- Hydrogen gas

Last Answer : (c). X- Sulphuric acid and Y- Hydrogen gas

Altering the amino acid profile in total parenteral nutrition solutions can be of benefit in certain conditions. Which of the following conditions are associated with a benefit by supplementation with the amino acid type listed? a. Acute renal failure and essential amino acids b. Hepatic failure and aromatic amino acids c. Short gut syndrome and glutamine d. Chronic renal failure and essential amino acids

Description : Altering the amino acid profile in total parenteral nutrition solutions can be of benefit in certain conditions. Which of the following conditions are associated with a benefit by supplementation with the ... c. Short gut syndrome and glutamine d. Chronic renal failure and essential amino acids

Last Answer : Answer: a, c In a number of conditions, altering the amino acid profile of the total parenteral nutrition solution can be of benefit. TPN with amino acids of high biologic value ... Glutamine-enriched TPN partially attenuates villous atrophy and may be useful in treatment of short gut syndrome

What are the necessary conditions for any system to be aromatic?

Description : What are the necessary conditions for any system to be aromatic?

Last Answer : Ans. A compound is said to be aromatic if it satisfies the following three conditions: (i) It should have a planar structure. (ii) The π-electrons of the compound are completely delocalized in the ring. (iii)The total number ... to (4n + 2), where n = 0, 1, 2 etc. This is known as Huckel s rule.

Conversion of benzene diazonium chloride to chloro benzene is an example of which of the following reactions ?

Description : Conversion of benzene diazonium chloride to chloro benzene is an example of which of the following reactions ?

Last Answer : Conversion of benzene diazonium chloride to chloro benzene is an example of which of the following ... Friedel-Crafts acylation C. Sandmeyer D. Wurtz

Complete reduction of benzene-diazonium chloride with Zn/HCl gives :

Description : Complete reduction of benzene-diazonium chloride with Zn/HCl gives :

Last Answer : Complete reduction of benzene-diazonium chloride with Zn/HCl gives : A. Aniline B. Phenylhydrazine C. Azobenzene D. Hydrazobenzene

Coupling reaction takes place when benzene diazonium chloride is treated with :

Description : Coupling reaction takes place when benzene diazonium chloride is treated with :

Last Answer : Coupling reaction takes place when benzene diazonium chloride is treated with : A. Benzaldehyde B. `alpha`-naphthol C. N, N-dimethyl aniline D. Phenol

Which of the following compounds will not undergo azo coupling reaction with benzene diazonium chloride?

Description : Which of the following compounds will not undergo azo coupling reaction with benzene diazonium chloride?

Last Answer : Which of the following compounds will not undergo azo coupling reaction with benzene diazonium chloride? ... B. Phenol C. Anisole D. Nitrobenzene

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.

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`

During the reaction of Benzene diazonium chloride with para-cresol the substitution occurs at_____position of p-cresol.

Description : During the reaction of Benzene diazonium chloride with para-cresol the substitution occurs at_____position of p-cresol.

Last Answer : During the reaction of Benzene diazonium chloride with para-cresol the substitution occurs at_____position of p-cresol.

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

Benzene diazonium chloride on hydrolysis gives

Description : Benzene diazonium chloride on hydrolysis gives

Last Answer : Benzene diazonium chloride on hydrolysis gives A. Benzene B. Benzyl alcohol C. Phenol D. Chlorobenzene

Aliphatic primary amines react with cold nitrous acid to form (a) Alcohols (b) Diazonium salts (c) Nitriles (d) Nitroalkanes

Description : Aliphatic primary amines react with cold nitrous acid to form (a) Alcohols (b) Diazonium salts (c) Nitriles (d) Nitroalkanes

Last Answer : Alcohols

Are protozoans presenting contractile, or pulsatile, vacuoles easily found in fresh or in salt water?

Description : Are protozoans presenting contractile, or pulsatile, vacuoles easily found in fresh or in salt water?

Last Answer : Fresh water is the less concentrated of solutes than sea water and it (fresh water) tends to be less concentrated than the intracellular environment making cells to swell. Sea water, on the other ... provided by the vacuoles, protozoans of fresh water would absorb too much water and would die.

Before X-ray examination (coloured Xray) of the stomach, patients are given suitable salt of barium because. (1) barium is a good absorber of X-rays and helps stomach to appear clearly (2) barium salts are white in colour and this helps stomach to appear clearly (3) barium allows X-rays to pass through the stomach (4) barium salts are easily available

Description : Before X-ray examination (coloured Xray) of the stomach, patients are given suitable salt of barium because. (1) barium is a good absorber of X-rays and helps stomach to appear clearly (2) barium ... clearly (3) barium allows X-rays to pass through the stomach (4) barium salts are easily available

Last Answer : (1) barium is a good absorber of X-rays and helps stomach to appear clearly

Cloud droplets unite most easily to form raindrops in clouds containing which of the following substances? w) ozone x) plant pollen y) carbon tetrachloride z) large salt crystals

Description : Cloud droplets unite most easily to form raindrops in clouds containing which of the following substances? w) ozone x) plant pollen y) carbon tetrachloride z) large salt crystals

Last Answer : ANSWER: Z -- LARGE SALT CRYSTALS

The figure shows a hypothetical tetrapeptide portion of a protein with parts labelled A-D. Which one of the following options is correct? – HN – CH – CO – NH – CH – CO – NH – CH – CO – HN – CH – CO – CH2 OH CH2 SH CH2 OH CH2 CH2 CH2– COOH A B C D (a) D is the acidic amino acid-glutamic acid. (b) C is an aromatic amino acid-tryptophan. (c) A is the C-terminal amino acid and D is N-terminal amino acid. (d) A is a sulphur containing amino acid methionine.

Description : The figure shows a hypothetical tetrapeptide portion of a protein with parts labelled A-D. Which one of the following options is correct? - HN - CH - CO - NH - CH - CO - NH - CH - CO - ... -terminal amino acid and D is N-terminal amino acid. (d) A is a sulphur containing amino acid methionine.

Last Answer : (a) D is the acidic amino acid-glutamic acid.

Which of the following statements is NOT correct : (a) Tollens' test is given by both aliphatic and aromatic aldehydes. (b) Fehling's test is given by aliphatic aldehydes. It is not given by aromatic aldehydes. (c) Iodoform test is given by methyl ketones and acetaldehydes. (d) Lucas test is given by both aliphatic and aromatic aldehydes

Description : Which of the following statements is NOT correct : (a) Tollens' test is given by both aliphatic and aromatic aldehydes. (b) Fehling's test is given by aliphatic aldehydes. It is not given ... given by methyl ketones and acetaldehydes. (d) Lucas test is given by both aliphatic and aromatic aldehydes

Last Answer : Lucas test is given by both aliphatic and aromatic aldehydes

Assertion (A) : Some carbonaceous aerosols may be carcinogenic. Reason (R) : They may contain polycyclic aromatic hydrocarbons (PAHs). (A) Both (A) and (R) are correct and (R) is the correct explanation of (A). (B) Both (A) and (R) are correct but (R) is not the correct explanation of (A). (C) (A) is correct, but (R) is false. (D) (A) is false, but (R) is correct.

Description : Assertion (A) : Some carbonaceous aerosols may be carcinogenic. Reason (R) : They may contain polycyclic aromatic hydrocarbons (PAHs). (A) Both (A) and (R) are correct and (R) is the correct explanation of (A). (B) Both ... (C) (A) is correct, but (R) is false. (D) (A) is false, but (R) is correct.

Last Answer : Answer: A

The following is correct about antipsychotic drugs except: A. They only control symptoms of schizophrenia without affecting the basic disorder B. Combination of two or more antipsychotic drugs is more efficacious than any single drug C. In treating psychosis high potency drugs are preferred over low potency drugs D. They donot produce dependence

Description : The following is correct about antipsychotic drugs except: A. They only control symptoms of schizophrenia without affecting the basic disorder B. Combination of two or more antipsychotic drugs is ... psychosis high potency drugs are preferred over low potency drugs D. They donot produce dependence

Last Answer : B. Combination of two or more antipsychotic drugs is more efficacious than any single drug

Processed meat and poultry products have good market. However, their export is mainly hampered due to...... (A) processing not as per demand (B) breeds are not suitable for export (C) no proper transport conditions (D) unhygienic conditions of slaughter houses and animal diseases (E) domestic market is available easily

Description : Processed meat and poultry products have good market. However, their export is mainly hampered due to...... (A) processing not as per demand (B) breeds are not suitable for export ... conditions (D) unhygienic conditions of slaughter houses and animal diseases (E) domestic market is available easily

Last Answer : (D) unhygienic conditions of slaughter houses and animal diseases

How do they get candles to be so aromatic ?

Description : How do they get candles to be so aromatic ?

Last Answer : Aromatic?

How can I make an aromatic essential oil out of these flowers?

Description : How can I make an aromatic essential oil out of these flowers?

Last Answer : http://www.ehow.com/how_4541401_make-essential-oil.html

Cinnamon water will come under which category of aromatic water?

Description : Cinnamon water will come under which category of aromatic water?

Last Answer : It will be under Concentrated Aromatic.

What are anti-aromatic compounds ?

Description : What are anti-aromatic compounds ?

Last Answer : Answer : A compound is called an anti-aromatic compound if the molecule of a compound has 4 সং electrons ( where n = 1, 2, 3 ...... etc) and a sphere of continuous p ... present in the molecule present in the molecule behave as anti-aromatic compounds. Such as cyclobutine , cyclopropinyl anion.

What is the difference between aliphatic compounds and aromatic compounds ?

Description : What is the difference between aliphatic compounds and aromatic compounds ?

Last Answer : aliphatic compounds 1. Aliphatic compounds are mainly free-chain. 2. Aliphatic compounds can be saturated or unsaturated. 3. Aliphatic compounds have low carbon content. 4. Replacement reactions ... compounds. 5. Aromatic halides are relatively less active. . Aromatic hydroxy compounds are acidic.

What is Aromatic Hydrocarbon ?

Description : What is Aromatic Hydrocarbon ?

Last Answer : Hydrocarbons with benzene and benzene rings are called aromatic hydrocarbons. Such as: benzene , phenol.

Aromatic Compounds Who Say ?

Last Answer : a few Special Featured To the compound Aromatic Compounds Says. Such as : benzene , phenol , naphthalene Compounds.

Select the one which does not results in the formation of aromatic species .

Description : Select the one which does not results in the formation of aromatic species .

Last Answer : Select the one which does not results in the formation of aromatic species . A. B. C. D.

Arrange the following compound in reactivity towards EAS (Electrophilic aromatic substitution) reaction ?

Description : Arrange the following compound in reactivity towards EAS (Electrophilic aromatic substitution) reaction ?

Last Answer : Arrange the following compound in reactivity towards EAS (Electrophilic aromatic substitution) reaction ? A. `A gt B gt ... A` D. `C gt B gt D gt A`