White phosphorus is always kept under (1) benzene (2) kerosene (3) ether (4) water

White phosphorus is always kept under (1) benzene (2) kerosene (3) ether (4) water
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White phosphorus is always kept under (1) benzene (2) kerosene (3) ether (4) water

Description : White phosphorus is always kept under (1) benzene (2) kerosene (3) ether (4) water

Last Answer : (4) water Explanation: White phosphorus is a material made from a common allotrope of the chemical element phosphorus that is used in smoke, tracer, illumination and incendiary munitions. Other common names include WP ... on fire, and cause serious burns or death and that is why it is kept in water.

White phosphorus is generally kept under – (1) Alcohol (2) Water (3) Glycerine (4) Kerosene oil

Description : White phosphorus is generally kept under – (1) Alcohol (2) Water (3) Glycerine (4) Kerosene oil

Last Answer : (2) Water Explanation: White phosphorous is kept under water because it reacts with oxygen but not water. Besides, it is insoluble in water. It presents a significant fire hazard due to its extreme reactivity with atmospheric oxygen.

White phosphorus is generally kept under (1) Alcohol (2) Water (3) Glycerine (4) Kerosene oil

Description : White phosphorus is generally kept under (1) Alcohol (2) Water (3) Glycerine (4) Kerosene oil

Last Answer : Water

White phosphorus is always kept under

Description : White phosphorus is always kept under

Last Answer : Water

Which of the following is used to remove ink and rust stains on cloth? (1) Oxalic acid (2) Alcohol (3) Ether (4) Kerosene oil

Description : Which of the following is used to remove ink and rust stains on cloth? (1) Oxalic acid (2) Alcohol (3) Ether (4) Kerosene oil

Last Answer : (1) Oxalic acid Explanation: Oxalic acid is a reducing agent and its conjugate base, known as oxalate, is a chelating agent for metal cations and stain removal. Oxalic acid's main applications include cleaning or bleaching, removal of stains on clothes and the removal of rust.

Which of the following is used to remove ink and rust stains on cloth? (1) Oxalic acid (2) Alcohol (3) Ether (4) Kerosene oil

Description : Which of the following is used to remove ink and rust stains on cloth? (1) Oxalic acid (2) Alcohol (3) Ether (4) Kerosene oil

Last Answer : Oxalic acid

Why is sodium metal kept under kerosene oil ?

Description : Why is sodium metal kept under kerosene oil ?

Last Answer : Ans. Sodium metal is highly reactive and combines with air forming sodium oxide.

Nail polish remover contains? (1) benzene (2) acetic acid (3) acetone (4) petroleum ether

Description : Nail polish remover contains? (1) benzene (2) acetic acid (3) acetone (4) petroleum ether

Last Answer : (3) Acetone Explanation: Acetone can remove artificial nails made of acrylic or cured gel. A less harsh nail polish remover is ethyl acetate, which often also contains isopropyl alcohol. Ethyl acetate is usually the original solvent for nail polish itself.

Nail polish remover contains? (1) Benzene (2) acetic acid (3) acetone (4) petroleum ether

Description : Nail polish remover contains? (1) Benzene (2) acetic acid (3) acetone (4) petroleum ether

Last Answer : (3) acetone Explanation: Acetone can remove artificial nails made of acrylic or cured gel. A less harsh nail polish remover is ethyl acetate, which often also contains isopropyl alcohol. Ethyl acetate is usually the original solvent for nail polish itself.

Why are Grignard reagents soluble in ether but not in benzene ?

Description : Why are Grignard reagents soluble in ether but not in benzene ? 

Last Answer : Ans. Grignard reagents from co-ordination complexes with ether but not benzene since the former has lone pair of electrons but the later does not.

Potassium is kept & transported under (A) Water (B) Liquid ammonia (C) Kerosene oil (D) Alcohol

Description : Potassium is kept & transported under (A) Water (B) Liquid ammonia (C) Kerosene oil (D) Alcohol

Last Answer : (C) Kerosene oil

Nail polish remover contains------? A. Acetone (Answer) B. Benzene C. Acetic acid D. Petroleum ether

Description : Nail polish remover contains------? A. Acetone (Answer) B. Benzene C. Acetic acid D. Petroleum ether

Last Answer : A. Acetone (Answer)

Name the following: (a) A metal, which is preserved in kerosene. (b) A lustrous coloured non-metal. (c) A metal, which can melt while kept on palm. (d) A metal, which is a poor conductor of heat. -Chemistry

Description : Name the following: (a) A metal, which is preserved in kerosene. (b) A lustrous coloured non-metal. (c) A metal, which can melt while kept on palm. (d) A metal, which is a poor conductor of heat. -Chemistry

Last Answer : a) Sodium is preserved in kerosene. (b) Iodine is lustrous coloured non-metal. (c) Gallium. ‘ (d) Lead.

Which of the following is very reactive and kept in kerosene? (1) Sodium (2) Potassium (3) Iodine (4) Bromine

Description : Which of the following is very reactive and kept in kerosene? (1) Sodium (2) Potassium (3) Iodine (4) Bromine

Last Answer : (1) Sodium Explanation: Sodium is a very reactive metal. It reacts vigorously with oxygen and water. A lot of heat is generated in this process. Therefore, it is stored in kerosene to avoid contacts between either atmospheric oxygen or water.

Which of the following is very reactive and kept in kerosene? (1) Sodium (2) Potassium (3) Iodine (4) Bromine

Description : Which of the following is very reactive and kept in kerosene? (1) Sodium (2) Potassium (3) Iodine (4) Bromine

Last Answer : Sodium

Phosphorus is kept in water because – (1) its ignition temperature is very high (2) its ignition temperature is very low (3) its critical temperature is high (4) its critical temperature is low

Description : Phosphorus is kept in water because – (1) its ignition temperature is very high (2) its ignition temperature is very low (3) its critical temperature is high (4) its critical temperature is low

Last Answer : (2) its ignition temperature is very low Explanation: The allotropic form of Phosphorus (white phosphorus) is less stable and therefore highly reactive because of angular strain in P4 molecule where the angles are only 600.

Phosphorus is kept in water because (1) its ignition temperature is very high (2) its ignition temperature is very low (3) its critical temperature is high (4) its critical temperature is low

Description : Phosphorus is kept in water because (1) its ignition temperature is very high (2) its ignition temperature is very low (3) its critical temperature is high (4) its critical temperature is low

Last Answer : its ignition temperature is very low

Which are the two metals kept in kerosene?

Description : Which are the two metals kept in kerosene?

Last Answer : Sodium; Potassium

1. Funds belonging to the Government of India are kept in which fund? 2. Why does Kerosene oil rise up in the wick of lantern? 3. Where is the headquarters of Food and Agriculture Organisation? 4. Xerophytes are plants which can grow in regions having how moisture? 5. Of which influence does the sculptures of the Gandhara school reflect?

Description : 1. Funds belonging to the Government of India are kept in which fund? 2. Why does Kerosene oil rise up in the wick of lantern? 3. Where is the headquarters of Food and Agriculture Organisation? ... 19. Which feature is the product of vulcanicity? 20. From where was the term Congress' derived?

Last Answer : Answer : 1 1. Consolidated Fund of India 2. Because of surface tension 3. Rome 4. Low moisture 5. Greeks 6. Income 7. Calcium and iron 8. Habeas Corpus 9. Equator 10. Spinning wheel 11. Na2 CO3 12. ... a type of garment 16. Brain 17. 24 18. Less than 90° 19. Caldera 20. The History of North America

Which one of the following forms of phosphorus is most reactive? (1) Black phosphorus (2) White phosphorus (3) Violet phosphorus (4) Red phosphorus

Description : Which one of the following forms of phosphorus is most reactive? (1) Black phosphorus (2) White phosphorus (3) Violet phosphorus (4) Red phosphorus

Last Answer : (2) White phosphorus Explanation: White phosphorus is the most reactive form of phosphorus. It is made up of discrete P4 tetrahedra which are subjected to very high angular strain as the angles ... reactive. It ignites spontaneously at about 50°C, and at much lower temperatures if finely divided.

The tip of the match-stick contains – (1) phosphorus pentoxide (2) white phosphorus (3) red phosphorus (4) phosphorus trichloricle

Description : The tip of the match-stick contains – (1) phosphorus pentoxide (2) white phosphorus (3) red phosphorus (4) phosphorus trichloricle

Last Answer : (3) red phosphorus Explanation: A typical modern match is made of a small wooden stick or stiff paper. One end is coated with a material that can be ignited by frictional heat generated by ... in rows stapled into matchbooks. They are commonly sold by tobacconists and many other kinds of shops.

Allotropic modifications of phosphorus include each of the following EXCEPT: w) red phosphorus x) black phosphorus y) white phosphorus z) green phosphorus

Description : Allotropic modifications of phosphorus include each of the following EXCEPT: w) red phosphorus x) black phosphorus y) white phosphorus z) green phosphorus

Last Answer : ANSWER: Z -- GREEN PHOSPHORUS

Which one of the following forms of phosphorus is most reactive? (1) Black phosphorus (2) White phosphorus (3) Violet phosphorus (4) Red phosphorus

Description : Which one of the following forms of phosphorus is most reactive? (1) Black phosphorus (2) White phosphorus (3) Violet phosphorus (4) Red phosphorus

Last Answer : White phosphorus

The tip of the match-stick contains (1) phosphorus pentoxide (2) white phosphorus (3) red phosphorus (4) phosphorus trichloride

Description : The tip of the match-stick contains (1) phosphorus pentoxide (2) white phosphorus (3) red phosphorus (4) phosphorus trichloride

Last Answer :  red phosphorus

Assume abortion has always been legal with no moral stigmatism: do you believe your birth mother would have still kept you under the circumstances of the time?

Description : Assume abortion has always been legal with no moral stigmatism: do you believe your birth mother would have still kept you under the circumstances of the time?

Last Answer : My parents were married already and have a 2 year old daughter when they had me. I’m pretty sure they were in full-parent mode at that point.

1. Which what is nucessary for digestion of food ? 2. Why are the Fundamental Freedoms under Article 19 suspended during emergency? 3. Which type of isomerism is shown by diethyl ether and methyl propyl ether? 4. Which river flows through a rift valley? 5. Which Mahajanapada was situated on the bank of river Godawari ?

Description : 1. Which what is nucessary for digestion of food ? 2. Why are the Fundamental Freedoms under Article 19 suspended during emergency? 3. Which type of isomerism is shown by diethyl ether and methyl ... largest number of sugar mills? 20. Where is the Shrine of Hazarat Nizamuddin Auliya is situated?

Last Answer : Answer : 1. Enzyme 2. War or external aggression 3. Metamerism 4. Narmada 5. Assaka 6. George Orwell 7. Debtors 8. Potassium 9. Myanmar 10. Nanda 11. Limited government 12. Conservation of ... Fourth 15. Khari Boli 16. Muttiah Muralitharan 17. Omnivore 18. President 19. Uttar Pradesh 20. Delhi

Which one is most acidic? (a) Hexanol (b) Phenol (c) Water (d) Diisopropyl ether

Description : Which one is most acidic? (a) Hexanol (b) Phenol (c) Water (d) Diisopropyl ether

Last Answer : Phenol

Acetic anhydride is obtained by the reaction of : (a) Acetic acid and sodium (b) Acetic acid and water (c) Acetic acid and diethyl ether (d) Acetic acid and P2O5

Description : Acetic anhydride is obtained by the reaction of : (a) Acetic acid and sodium (b) Acetic acid and water (c) Acetic acid and diethyl ether (d) Acetic acid and P2O5

Last Answer : Acetic acid and P2O5

Which of the following statements reflect the nursing management of the patient with a white phosphorus chemical burn? a) Do not apply water to the burn. Water should not be applied to burns from lye or white phosphorus because of the potential for an explosion or deepening of the burn.

Description : Which of the following statements reflect the nursing management of the patient with a white phosphorus chemical burn? a) Do not apply water to the burn. Water should not be applied to burns from ... from lye or white phosphorus because of the potential for an explosion or deepening of the burn.

Last Answer : a) Do not apply water to the burn. Water should not be applied to burns from lye or white phosphorus because of the potential for an explosion or deepening of the burn.

Denatured spirit is ethanol mixed with (1) Petrol (2) Kerosene (3) Water (4) Pyridine

Description : Denatured spirit is ethanol mixed with (1) Petrol (2) Kerosene (3) Water (4) Pyridine 

Last Answer : Pyridine

Silver nitrate solution is kept in brown bottles in laboratory because (1) it reacts with ordinary white bottles (2) brown bottles stops the passage of light through it (3) brown bottles do not react with it (4) brown bottles react with it

Description : Silver nitrate solution is kept in brown bottles in laboratory because (1) it reacts with ordinary white bottles (2) brown bottles stops the passage of light through it (3) brown bottles do not react with it (4) brown bottles react with it

Last Answer : brown bottles stops the passage of light through it

Which is not an anasthetic agent in surgical operations? (1) Chloroform (2) Ether (3) Nitrous oxide (4) Acetone

Description : Which is not an anasthetic agent in surgical operations? (1) Chloroform (2) Ether (3) Nitrous oxide (4) Acetone

Last Answer : (4) Acetone Explanation: The currently used inhalational anaesthetic agents are mainly: nitrous oxide, isoflurane, sevoflurane and desflurane. Chloroform, ether, ethylene are other anaesthetic agents. However, they are not widely used in clinical practice today.

The pair of compounds used as anesthetic in medicines – (1) Ether, Ammonia (2) Nitrous oxide, Chloroform (3) Chloroform, Nitrogen dioxide (4) Nitrogen dioxide, ether

Description : The pair of compounds used as anesthetic in medicines – (1) Ether, Ammonia (2) Nitrous oxide, Chloroform (3) Chloroform, Nitrogen dioxide (4) Nitrogen dioxide, ether

Last Answer : (2) Nitrous oxide, Chloroform Explanation: Nitrous oxide is one of the more well-known anesthetic gases, and has been in use for around 200 years. Unlike some other anesthetics, this compound ... than ether. Its use as an anaesthetic decreased with increased experience and knowledge of its dangers.

One of the constituents of tear gas is - (1) Ethane (2) Ethanol (3) Ether (4) Chloropicrin

Description : One of the constituents of tear gas is - (1) Ethane (2) Ethanol (3) Ether (4) Chloropicrin

Last Answer : (4) Chloropicrin Explanation: Chloropicrin is a colourless liquid that is insoluble in water, with which it is stable. With a vapor pressure of 24 mm Hg, its volatility is between ... their eyes involuntarily. Chloropicrin can be absorbed systemically through inhalation, ingestion, and the skin.

Which one of the following organic compounds has fruity smell? (1) Alcohol (2) Aldehyde (3) Ester (4) Ether

Description : Which one of the following organic compounds has fruity smell? (1) Alcohol (2) Aldehyde (3) Ester (4) Ether

Last Answer : (3) Ester Explanation: Esters are common in organic chemistry and biological materials, and often have a characteristic pleasant, fruity odour. This leads to their extensive use in the fragrance and ... ester as the reaction product. Esters are widespread in nature and are widely used in industry.

Write the metamer of diethyl ether. What is its IUPAC name?

Description : Write the metamer of diethyl ether. What is its IUPAC name?

Last Answer : Ans.1-methoxypropane, CH3OCH2CH2CH3 or 2-methoxypropane,CH3OCH(CH3)2

Di-tert butyl ether cannot be made by Williamson’s synthesis. Explain why ?

Description : Di-tert butyl ether cannot be made by Williamson’s synthesis. Explain why ?

Last Answer : Ans. To prepare di tert-butyl ether by Williamson's synthesis, we need tert-butyl bromide and Sodium tertiary butoxide. Since tert-butyl bromide being 3°-alkyl halide prefers to ... rather than substitution, therefore the product obtained is isobutylene rather than ditertiary butyl ether.

Which of the following has the most acidic proton? (a) Thiol (b) Alcohol (c) Phenol (d) Ether

Description : Which of the following has the most acidic proton? (a) Thiol (b) Alcohol (c) Phenol (d) Ether

Last Answer : Phenol

Which of the following compounds will give cyclopropane on treatment with sodium in dry ether? (a) 1,3-Dibromopropane (b) 1,1-Dibromopropane (c) 1,2-Dibromopropane (d) 2,2-Dibromopropane

Description : Which of the following compounds will give cyclopropane on treatment with sodium in dry ether? (a) 1,3-Dibromopropane (b) 1,1-Dibromopropane (c) 1,2-Dibromopropane (d) 2,2-Dibromopropane

Last Answer : 1,3-Dibromopropane

Which of the following is the main structural feature of proteins? (a) Peptide linkage (b) Ester linkage (c) Ether linkage (d) α,β-Linkage

Description : Which of the following is the main structural feature of proteins? (a) Peptide linkage (b) Ester linkage (c) Ether linkage (d) α,β-Linkage

Last Answer : Peptide linkage

Assuming roughly equivalent molecular weights, which of the following would have the highest boiling point? (a) a tertiary amine (b) a quaternary ammonium salt (c) an alcohol (d) an ether

Description : Assuming roughly equivalent molecular weights, which of the following would have the highest boiling point? (a) a tertiary amine (b) a quaternary ammonium salt (c) an alcohol (d) an ether

Last Answer : a quaternary ammonium salt

Ethyl acetate on heating with sodium ethoxide gives (a) Ethyl acetoacetate (b) Sodium acetate (c) Ethyl alcohol (d) Diethyl ether

Description : Ethyl acetate on heating with sodium ethoxide gives (a) Ethyl acetoacetate (b) Sodium acetate (c) Ethyl alcohol (d) Diethyl ether

Last Answer : Ethyl acetoacetate

Which of the following will have the highest boiling point? (a) Diethyl ether (b) n-Butane (c) Acetamide (d) n-Propylamine

Description : Which of the following will have the highest boiling point? (a) Diethyl ether (b) n-Butane (c) Acetamide (d) n-Propylamine

Last Answer : Acetamide

An organic compound (A), C3H8O, on oxidation gives (B), C3H6O. The compound (B) could be (a) a carbonyl compound (b) an alcohol (c) a carboxylic acid (d) an ether

Description : An organic compound (A), C3H8O, on oxidation gives (B), C3H6O. The compound (B) could be (a) a carbonyl compound (b) an alcohol (c) a carboxylic acid (d) an ether

Last Answer : a carbonyl compound

When dipentyl ether is treated with excess HI, through what type of mechanism(s) does the major product result? (a) SN2 (b) SN1 (c) E1(d) E2

Description : When dipentyl ether is treated with excess HI, through what type of mechanism(s) does the major product result? (a) SN2 (b) SN1 (c) E1 (d) E2

Last Answer : SN2

Ethylene reacts with oxygen in the presence of silver catalyst at 300°C to form (a) Diethyl ether (b) Ethylene glycol (c) Ethyl alcoho(d) Ethylene oxidel

Description : Ethylene reacts with oxygen in the presence of silver catalyst at 300°C to form (a) Diethyl ether (b) Ethylene glycol (c) Ethyl alcohol (d) Ethylene oxide

Last Answer : Ethylene oxide

Which of the following functional group series is ranked according to increasing boiling points? (a) diethyl ether, ethane, ethanol, ethanethiol (b) ethane, ethanol, diethyl ether, ethanethiol (c) ethane, diethyl ether, ethanethiol, ethanol (d) diethyl ether, ethane, ethanethiol, ethanol

Description : Which of the following functional group series is ranked according to increasing boiling points? (a) diethyl ether, ethane, ethanol, ethanethiol (b) ethane, ethanol, diethyl ether, ethanethiol (c) ethane, diethyl ether, ethanethiol, ethanol (d) diethyl ether, ethane, ethanethiol, ethanol

Last Answer : ethane, diethyl ether, ethanethiol, ethanol

Which of the following would have the highest boiling point? (a) Dimethyl ether (b) Diethyl ether (c) Ethyl methyl ether (d) Diisopropyl ether

Description : Which of the following would have the highest boiling point? (a) Dimethyl ether (b) Diethyl ether (c) Ethyl methyl ether (d) Diisopropyl ether

Last Answer : Diisopropyl ether

Diethyl ether reacts with excess of hot concentrated HI to form (a) CH3CH2I + CH3CH2OH (b) Only CH3CH2OH (c) CH3CH2OH + CH2=CH2 (d) Only CH3CH2

Description : Diethyl ether reacts with excess of hot concentrated HI to form (a) CH3CH2I + CH3CH2OH (b) Only CH3CH2OH (c) CH3CH2OH + CH2=CH2 (d) Only CH3CH2

Last Answer : Only CH3CH2

Diethyl ether on heating with excess concentrated HI gives (a) Methyl iodide (b) Isopropyl iodide (c) Ethyl iodide (d) n-Propyl iodide

Description : Diethyl ether on heating with excess concentrated HI gives (a) Methyl iodide (b) Isopropyl iodide (c) Ethyl iodide (d) n-Propyl iodide

Last Answer : Ethyl iodide