Description : p-cresol reacts with chloroform in alkaline medium to give the compound A which adds hydrogen cyanide to form, the compound B. the latter on acedic hy
Last Answer : p-cresol reacts with chloroform in alkaline medium to give the compound A which adds hydrogen cyanide to form, ... the carboxylic acid is A. B. C. D.
Description : _____ is used to trap benzyne. a. Phenol b. Chloroform c. Furan d. Thiophene
Last Answer : c. Furan
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)`
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
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.
Description : `Br_(2)` dissolved in `CS_(2)` reacts with phenol at 273 K to give ..... as the major product
Last Answer : `Br_(2)` dissolved in `CS_(2)` reacts with phenol at 273 K to give ..... as the major ... . m-Bromophenol C. p-Bromophenol D. 2,4,6-Tribromophenol
Description : Carbonyl chloride reacts with ammonia to give (a) Urea (b) Acetone (c) Acetamide (d) Chloroform
Last Answer : Urea
Description : A nitrile X is treated with `LiAIH_(4)` to obtain compound `Y(C_(2)H_(9)N)` reacts with benzensulfonyl chloride to give `Y(C_(13)H_(13)NO_(2)S)` which
Last Answer : A nitrile X is treated with `LiAIH_(4)` to obtain compound `Y(C_(2)H_(9)N)` reacts with benzensulfonyl chloride ... (3)CH_2COO^(-))(CH_(3)NH_(3)^(+))`
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
Description : In sweetening process, solutizer agent used with caustic alkali is (A) Potassium isobutyrate (B) Sodium plumbite (C) Methanol (D) Phenol
Last Answer : (A) Potassium isobutyrate
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
Description : Phenol reacts with bromine in carbon disulphide at low temperature to give
Last Answer : Phenol reacts with bromine in carbon disulphide at low temperature to give A. m-bromophenol B. o-and p ... C. p-bromophenol D. 2, 4,6-tribromophenol
Description : Phenylmagnesium bromide reacts with CO2 followed by acid-hydrolysis to form : (a) Phenol (b) Benzoic acid (c) Bromobenzene (d) Acetophenone
Last Answer : Benzoic acid
Description : Phenol reacts with excess bromine water to give (a) o- plus p-Bromophenol (b) Bromobenzene (c) 2,4,6-Tribromophenol (d) m-Bromophenol
Last Answer : 2,4,6-Tribromophenol
Description : Benzenediazonium chloride reacts with phenol to form : (a) p-chlorophenol (b) Chlorobenzene (c) p-Hydroxyazobenzene (d) DDT
Last Answer : p-Hydroxyazobenzene
Description : Benzenediazonium chloride reacts with hypophosphorus acid to form : (a) Phenol (b) Benzaldehyde (c) Aniline (d) Benzene
Last Answer : Benzene
Description : Benzenediazonium chloride reacts with warm water to give (a) Aniline (b) Phenol (c) Benzene (d) Chlorobenzene
Last Answer : Phenol
Description : Which of the following compounds reacts least rapidly in electrophilic substitution reactions? (a) Nitrobenzene (b) Phenol (c) Bromobenzene (d) Toluene
Last Answer : Nitrobenzene
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
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.
Description : `Cl_2O_6` reacts with water and alkali to give:
Last Answer : `Cl_2O_6` reacts with water and alkali to give: A. (A) Only sodium chlorate B. (B) Only ... chlorate and sodum perchlorate D. (D) None of these
Description : Laboratory glass wares which reacts with hydrofluoric acid, are made of the __________ glass. (A) Lead (B) Borosilicate (C) Soda lime (D) Alkali silicate
Last Answer : (B) Borosilicate
Description : The pair of the equimolar compound that would be give a single condensation product when treated with an alkali is
Last Answer : The pair of the equimolar compound that would be give a single condensation product when treated with an alkali is A ... ` B. C. D. `CH_(3)CHO+HCHO`
Description : An organic compound ("X") is a disubstituted benzene containing 77.8% carbon and 7.4 % hydrogen. Heating an alkaline solution of "X" with chloroform g
Last Answer : An organic compound ("X") is a disubstituted benzene containing 77.8% carbon and 7.4 % hydrogen. Heating an alkaline ... "Z". "Z" is A. B. C. D.
Description : The nitrogen compound formed when `CaCN_(2)` reacts with steam or hot water is
Last Answer : The nitrogen compound formed when `CaCN_(2)` reacts with steam or hot water is A. `N_(2)O` B. NO C. `NO_(2)` D. `NH_(3)`
Description : `XeF_6` on partial hydrolysis with water produces a compound ‘X’. The same compound ‘X’ is formed when `XeF_6` reacts with silica. The compound ‘X’ Is
Last Answer : `XeF_6` on partial hydrolysis with water produces a compound X'. The same compound X' is formed when `XeF_6` ... XeF_4` C. (3)`XeF_2` D. (4)`XeOF_4`
Description : When ethylalcohol reacts with `Br_(2)` in presencce of red phosphorus the compound formed is
Last Answer : When ethylalcohol reacts with `Br_(2)` in presencce of red phosphorus the compound formed is A. `C_(2)H_(6)` B. ` ... C. `CH_(3)Br` D. `C_(2)H_(5)Br`
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
Description : Which of the following poisonous gas is formed when chloroform is exposed to light and air? (a) Mustard gas (b) Carbon monoxide (c) Phosgene (d) Chlorine
Last Answer : Phosgene
Description : A compound X of the formula `C_(2)H_(6)O` on reaction with Na metal gave Y, X also reacts with `PC1_(5)` to give Z the product obtained in the reactio
Last Answer : A compound X of the formula `C_(2)H_(6)O` on reaction with Na metal gave Y, X also reacts with `PC1_(5)` to ... )H_(5)` D. `C_(2)H_(5)OC_(2)H_(5)`
Description : When primary aminereacts with chloroform in ehthanolic `KOH` then the product is .
Last Answer : When primary aminereacts with chloroform in ehthanolic `KOH` then the product is . A. an isocyanide B. an aldehyde C. a cyanide D. an alcohol
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
Description : Which one of the following can be oxidized to the corresponding carbonyl compound - (1) O-Nitrophenol (2) Phenol (3) 2-methyl-2-hydroxy propane (4) 2-hydroxy propane
Last Answer : (4) 2-hydroxy propane
Description : .If a 1:600 dilution of a test compound kills a standard population of Staphylococcus aureus in 10minutes but not 5 minutes while a 1:60 dilution of phenol kills the population in thesame time, what is the phenol coefficient of the test compound? A- 1 B- 5 C- .10 D- .50
Last Answer : .10
Description : The compound that on treatment with benzene sulphonyl chloride, forms a precipitate soluble in alkali, is
Last Answer : The compound that on treatment with benzene sulphonyl chloride, forms a precipitate soluble in alkali, is A. `(C_(2) ... -NH_(2)` D. `CH_(3)-CONH_(2)`
Description : 0.257g of organic substance was heated with conc. sulphuric acid and then distilled with excess of strong alkali .the ammonia gas evolved was absorbed in 50ml of .1M HCl which required 23.2ml of c for neutralization at the end of the process. Determine the % of nitrogen in the compound ?
Last Answer : A. Vol of 0 .1M HCl taken = 50ml Vol of .1MNaOH used for neutralization of unused acid=23.2ml Now, 23.2 ml of .1MNaOH =23.2ml of .1MHCl Vol of .1MHCl unused=23.2ml Vol of .1MHCl required ... NH3 solution contain nitrogen = 14*26.8/10*1000 Percentage of Nitrogen=14*26.8*100/10*1000*.257 =14.6%
Description : Anisole is formed when phenol is treated with (a) CH3I/NaOH (b) CH3CH2I/NaOH (c) CHCl3/NaOH (d) Acetic anhydride
Last Answer : CH3I/NaOH
Description : Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which (A) A homogeneous solution (say of phenol water) is ... a decreasing trend (C) Two liquids are completely separated into two layers (D) None of these
Last Answer : (A) A homogeneous solution (say of phenol water) is formed
Description : what do you understand by “Non stoichiometric hydrides”? Do you think this type of hydrides to be formed by alkali metals? Justify your answer.
Last Answer : Ans: Hydrides which are deficient in hydrogen and in which the ratio of hydrogen to metal is fractional are called non-stoichiometric hydrides. This type of hydrides are formed by d-and ... they form only stoichiometric hydrides. In other words alkali metals do not form non-stoichiometric hydrides.
Description : A compound X' on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound Y'. X' also reacts with sodium metal to evolve a colourless gas Z'. Identify X', Y' ... the chemical reaction of formation of Y' and also write the role of sulphuric acid in the reaction. -Science
Last Answer : X-Ethanol/ (C2H5OH)/Ethyl AlcoholY- Ethene / (C2H4)Z- Hydrogen/ (H2)Role of sulphuric acid - dehydrating agent
Description : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts nitrous acid then occurs a brisk evolution of `N_(2)` gas. A dissolve
Last Answer : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts ... . 1-phenylethanamine C. 1-cyclohexylethanamine D. N-ethylaniline
Description : An orgainc compound A upon reacting with `NH_(3)` gives `B` On heating `B` give `C.C` in presence `KOH` reacts with `Br_(2)` to yield `CH_(3)CH_(2)NH_
Last Answer : An orgainc compound A upon reacting with `NH_(3)` gives `B` On heating `B` give `C.C` in presence `KOH ... underset(|)(CH)-COOH` D. `CH_(3)CH_(2)COOH`
Description : An organic compound A,`C_(5)H_(8)O` reacts with `H_(2)O, NH_(3)` and `CH_(3)COOH` as described below A is
Last Answer : An organic compound A,`C_(5)H_(8)O` reacts with `H_(2)O, NH_(3)` and `CH_(3)COOH` as described ... 2))underset(||)(C)-underset(H)underset(|)(C)=O`
Description : A white crystaline oxide (A) having garlic smell reacts with cold water to form a compound (B). On heating, (B) gives compound (C) & gas (D). Which of
Last Answer : A white crystaline oxide (A) having garlic smell reacts with cold water to form a compound (B). On ... ) can act as a reducing agent but (C) cannot
Description : One mole of complex compound `Co(NH_3)_5Cl_3` gives 3 moles of ions on dissolution in water. One mole of same complex reacts with two moles of `AgNO_3
Last Answer : One mole of complex compound `Co(NH_3)_5Cl_3` gives 3 moles of ions on dissolution in water. One mole of same ... [Co(NH_(3))_(3)Cl_(3)].2NH_(3)`
Description : Sulphide ion reacts with `[Fe(CN)_(5)NO]` to form a purple coloured compound (X). In this reaction oxidation state of iron .
Last Answer : Sulphide ion reacts with `[Fe(CN)_(5)NO]` to form a purple coloured compound (X). In this reaction ... . changes from +2 to +4 D. does not change.
Description : Compound `[X] C_(4)H_(11)N` reacts with p-toluence sulphonyl chloride in aqueous `NaOH` to give a solid. The compound [X] is:
Last Answer : Compound `[X] C_(4)H_(11)N` reacts with p-toluence sulphonyl chloride in aqueous `NaOH` to give a solid. ... 2)-underset(CH_(3))underset(|)(N)-CH_(3)`
Description : A `C_(6)H_(12)O` compound does not react with `Br_(2)` in `C Cl_(4)`, produces a flammable gas on treatment with `LiAlH_(4)`, and reacts with `H_(2)Cr
Last Answer : A `C_(6)H_(12)O` compound does not react with `Br_(2)` in `C Cl_(4)`, ... B. methoxycyclopentane C. 2-cyclopropyl-2-propanol D. 2-cyclobutylethanol