DDT is prepared by the reaction of chlorobenzene with (in the presence of conc. H2SO4) (a) Chloral (b) Chlorine (c) Chloroform (d) Carbon tetrachloride

DDT is prepared by the reaction of chlorobenzene with (in the presence of
conc. H2SO4)
(a) Chloral
(b) Chlorine
(c) Chloroform
(d) Carbon tetrachloride
by

1 Answer

Answer :

Chloral
by

Related questions

The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is (A) Dilute H2SO4 (B) Oleum (C) Ultraviolet light (D) None of these

Description : The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is (A) Dilute H2SO4 (B) Oleum (C) Ultraviolet light (D) None of these

Last Answer : (B) Oleum

Pick out the wrong statement. (A) DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction (B) Chloral is obtained by the chlorination of ethyl alcohol (C) Insecticides acting on the insects through the respiratory system are called fumigants (D) Benzene hexachloride is not a contact insecticide

Description : Pick out the wrong statement. (A) DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction (B) Chloral ... through the respiratory system are called fumigants (D) Benzene hexachloride is not a contact insecticide

Last Answer : (D) Benzene hexachloride is not a contact insecticide

The compound formed on heating chlorobenzene with chloral in te presence of concentrated sulphuric acid is

Description : The compound formed on heating chlorobenzene with chloral in te presence of concentrated sulphuric acid is

Last Answer : The compound formed on heating chlorobenzene with chloral in te presence of concentrated sulphuric acid is ... B. DDT C. freon D. Hexachloroethane

Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C. (A) 15-30 (B) 90-100 (C) 250-300 (D) < 0

Description : Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C. (A) 15-30 (B) 90-100 (C) 250-300 (D) < 0

Last Answer : (A) 15-30

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

Which of the following, when pyrolysed, produces Perchloroethylene? (A) Ethylene dichloride (B) Chlorobenzene (C) Carbon tetrachloride (D) Chlorinated paraffin

Description : Which of the following, when pyrolysed, produces Perchloroethylene? (A) Ethylene dichloride (B) Chlorobenzene (C) Carbon tetrachloride (D) Chlorinated paraffin

Last Answer : (C) Carbon tetrachloride

Vinegar is the trade name of - (1) acetic acid (2) chloroform (3) carbon tetrachloride (4) ethyl alcohol

Description : Vinegar is the trade name of - (1) acetic acid (2) chloroform (3) carbon tetrachloride (4) ethyl alcohol

Last Answer : (1) acetic acid Explanation: The trivial name acetic acid is the most commonly used and preferred IUPAC name. The systematic name ethanoic acid, a valid IUPAC name, is constructed according to the substitutive nomenclature.

Which of the following compounds have highest dipole moment? (a) dichloromethane (b) chloroform (c) chloromethane (d) carbon tetrachloride

Description : Which of the following compounds have highest dipole moment? (a) dichloromethane (b) chloroform (c) chloromethane (d) carbon tetrachloride

Last Answer : dichloromethane

Which of the following compounds have lowest dipole moment? (a) carbon tetrachloride(b) chloromethane(c) dichloromethane(d) chloroform

Description : Which of the following compounds have lowest dipole moment? (a) carbon tetrachloride (b) chloromethane (c) dichloromethane (d) chloroform

Last Answer : carbon tetrachloride

Which of the following would you expect to have the highest boiling point? w) methane x) carbon tetrachloride y) chloroform z) chloromethane

Description : Which of the following would you expect to have the highest boiling point? w) methane x) carbon tetrachloride y) chloroform z) chloromethane

Last Answer : ANSWER: X -- CARBON TETRACHLORIDE

Which of the following reagents is most suitable for preparing chlorobenzene from benzene? (a) Aqueous chlorine (b) Chlorine in the presence of ultraviolet light (c) Chlorine in acetic acid (d) Chlorine in the presence of FeCl3

Description : Which of the following reagents is most suitable for preparing chlorobenzene from benzene? (a) Aqueous chlorine (b) Chlorine in the presence of ultraviolet light (c) Chlorine in acetic acid (d) Chlorine in the presence of FeCl3

Last Answer : Chlorine in the presence of FeCl3

Benzene reacts with chlorine in the presence of FeCl3 catalyst to form (a) Hexachlorobenzene (b) Chlorobenzene (c) Hexachlorocyclohexane (d) Benzyl chloride

Description : Benzene reacts with chlorine in the presence of FeCl3 catalyst to form (a) Hexachlorobenzene (b) Chlorobenzene (c) Hexachlorocyclohexane (d) Benzyl chloride

Last Answer : Chlorobenzene

Chloral is used in the manufacture of (A) DDT (B) BHC (C) Parathion (D) None of these

Description : Chloral is used in the manufacture of (A) DDT (B) BHC (C) Parathion (D) None of these

Last Answer : (A) DDT

Benzenediazonium chloride reacts with phenol to form : (a) p-chlorophenol (b) Chlorobenzene (c) p-Hydroxyazobenzene (d) DDT

Description : Benzenediazonium chloride reacts with phenol to form : (a) p-chlorophenol (b) Chlorobenzene (c) p-Hydroxyazobenzene (d) DDT

Last Answer : p-Hydroxyazobenzene

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

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

What is the major organic product of the reaction between benzene and isobutyl chloride in the presence of AlCl3? (a) tert-butylbenzene (b) isobutylbenzene (c) n-butylbenzene (d) chlorobenzene

Description : What is the major organic product of the reaction between benzene and isobutyl chloride in the presence of AlCl3? (a) tert-butylbenzene (b) isobutylbenzene (c) n-butylbenzene (d) chlorobenzene

Last Answer : tert-butylbenzene

Which of the following statements is false about toluene? (a) can be prepared by treating benzene with methyl chloride in the presence of AlCl3. (b) is converted to benzoic acid on refluxing with acidic KMnO4 solution. (c) on refluxing with concentrated H2SO4 gives a mixture of ortho and para toluenesulfonic acid. (d) can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene.

Description : Which of the following statements is false about toluene? (a) can be prepared by treating benzene with methyl chloride in the presence of AlCl3. (b) is converted to benzoic acid on refluxing with ... (d) can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene.

Last Answer : can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene

. Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an __________ reaction. (A) Elementary (B) Parallel(C) Consecutive(D) None of these

Description : . Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an __________ reaction. (A) Elementary (B) Parallel (C) Consecutive (D) None of these

Last Answer : (C) Consecutive

Aquaregia is a mixture of the following in the ratio 1 : 3 by volume– (1) cone. HNO3 and cone. HCL (2) conc. HNO3 and conc. H2SO4 (3) dil. HCl and dil. HNO3 (4) cone. HCl and cone. HNO3

Description : Aquaregia is a mixture of the following in the ratio 1 : 3 by volume– (1) cone. HNO3 and cone. HCL (2) conc. HNO3 and conc. H2SO4 (3) dil. HCl and dil. HNO3 (4) cone. HCl and cone. HNO3

Last Answer : (3) dil. HCl and dil. HNO3 Explanation: Aqua regia or nitro-hydrochloric acid is a highly corrosive mixture of acids which is formed by freshly mixing concentrated Nitric acid (HNO3) and Hydrochloric acid (HCl), optimally in a volume ratio of 1:3. It is used in dissolving gold.

Oil of Wintergreen (Methyl salicylate) is obtained by treating salicylic acid with (a) Methane at 150°C (b) CH3OH and conc. H2SO4 (c) Methyl chloride (d) NaOH and then CH3OH

Description : Oil of Wintergreen (Methyl salicylate) is obtained by treating salicylic acid with (a) Methane at 150°C (b) CH3OH and conc. H2SO4 (c) Methyl chloride (d) NaOH and then CH3OH

Last Answer : CH3OH and conc. H2SO4

Which is the best reagent to accomplish the following conversion? (a) Conc. H2SO4 (b) Na (c) Conc.HC(d) Mg, then H2Ol

Description : Which is the best reagent to accomplish the following conversion? (a) Conc. H2SO4 (b) Na (c) Conc. HCl (d) Mg, then H2O

Last Answer : Mg, then H2O

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

Methane can be prepared by : (a) the reaction of iodomethane with sodium in dry ether (b) the reaction of methanol with concentrated H2SO4 (c) the reaction of sodium methanoate with soda-lime (d) the reaction of sodium ethanoate with soda-lime

Description : Methane can be prepared by : (a) the reaction of iodomethane with sodium in dry ether (b) the reaction of methanol with concentrated H2SO4 (c) the reaction of sodium methanoate with soda-lime (d) the reaction of sodium ethanoate with soda-lime

Last Answer : the reaction of sodium ethanoate with soda-lime

Pick out the wrong statement. (A) Catalytic hydrogenation of carbon monoxide produces methyl alcohol (B) In nylon-6, the number 6 represents the total number of carbon atoms in the ring (C) Raw materials for DDT manufacture are benzene and chlorine (D) Ethanolamines are produced by using ammonia and ethylene oxide as raw material

Description : Pick out the wrong statement. (A) Catalytic hydrogenation of carbon monoxide produces methyl alcohol (B) In nylon-6, the number 6 represents the total number of carbon atoms in the ring (C ... are benzene and chlorine (D) Ethanolamines are produced by using ammonia and ethylene oxide as raw material

Last Answer : (C) Raw materials for DDT manufacture are benzene and chlorine

Which of the following can be made by the action of CH3Cl on benzene in the presence of aluminium chloride? (a) Ethylbenzene (b) o-Xylene (c) Chlorobenzene (d) m-Xylene

Description : Which of the following can be made by the action of CH3Cl on benzene in the presence of aluminium chloride? (a) Ethylbenzene (b) o-Xylene (c) Chlorobenzene (d) m-Xylene

Last Answer : o-Xylene

10.Biomagnification of DDT in an aquatic food chain staring from water having conc.of 0.003ppb may go in fish eating birds upto

Description : 10.Biomagnification of DDT in an aquatic food chain staring from water having conc.of 0.003ppb may go in fish eating birds upto (a)2ppm (b)25ppm (c)50ppm (d)100ppm

Last Answer : ANS.(B) 25ppm

Pick out the wrong statement. (A) For the manufacture of styrene, the major raw materials are benzene and ethylene (B) One important copolymer of styrene is SBR, which is widely used in the manufacture of automobile tyres (C) Manufacture of phenol by chloroben-zene-eaustic process involves. The chlorination of benzene, causticisation and hydrolysis (D) Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available

Description : Pick out the wrong statement. (A) For the manufacture of styrene, the major raw materials are benzene and ethylene (B) One important copolymer of styrene is SBR, which is widely ... D) Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available

Last Answer : (D) Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available

The surface tension in intestinal lumen between fat droplets and aqueous medium is decreased by (A) Bile Salts (B) Bile acids (C) Conc. H2SO4 (D) Acetic acid

Description : The surface tension in intestinal lumen between fat droplets and aqueous medium is decreased by (A) Bile Salts (B) Bile acids (C) Conc. H2SO4 (D) Acetic acid

Last Answer : A

The surface tension in intestinal lumen between fat droplets and aqueous medium is decreased by (A) Bile Salts (B) Bile acids (C) Conc. H2SO4 (D) Acetic acid

Description : The surface tension in intestinal lumen between fat droplets and aqueous medium is decreased by (A) Bile Salts (B) Bile acids (C) Conc. H2SO4 (D) Acetic acid

Last Answer : (A) Bile Salts

Which of the following statements is false about secondary amines? (a) They react with chloroform and NaOH to form isocyanides. (b) They can be prepared by reduction of isocyanides. (c) They react with acid chlorides to give substituted amides. (d) They react with ice-cold nitrous acid to give nitrosamine (yellow oil)

Description : Which of the following statements is false about secondary amines? (a) They react with chloroform and NaOH to form isocyanides. (b) They can be prepared by reduction of isocyanides. (c) They react ... give substituted amides. (d) They react with ice-cold nitrous acid to give nitrosamine (yellow oil)

Last Answer : They react with chloroform and NaOH to form isocyanides.

Benzene undergoes Friedel-Crafts reaction with isopropyl alcohol in the presence of H2SO4 catalyst to give (a) n-Propylbenzene (b) Benzophenone (c) Isopropylbenzene (d) Nothing happens

Description : Benzene undergoes Friedel-Crafts reaction with isopropyl alcohol in the presence of H2SO4 catalyst to give (a) n-Propylbenzene (b) Benzophenone (c) Isopropylbenzene (d) Nothing happens

Last Answer : Isopropylbenzene

Benzene reacts with concentrated HNO3 in the presence of concentrated H2SO4 to give nitrobenzene. This reaction is an example of (a) Electrophilic addition (b) Nucleophilic addition (c) Electrophilic substitution (d) Nucleophilic substitution

Description : Benzene reacts with concentrated HNO3 in the presence of concentrated H2SO4 to give nitrobenzene. This reaction is an example of (a) Electrophilic addition (b) Nucleophilic addition (c) Electrophilic substitution (d) Nucleophilic substitution

Last Answer : Electrophilic substitution

Benzene reacts with concentrated HNO3 in the presence of concentrated H2SO4 to give nitrobenzene. This reaction is an example of (a) Electrophilic addition (b) Nucleophilic addition (c) Electrophilic substitution (d) Nucleophilic substitution

Description : Benzene reacts with concentrated HNO3 in the presence of concentrated H2SO4 to give nitrobenzene. This reaction is an example of (a) Electrophilic addition (b) Nucleophilic addition (c) Electrophilic substitution (d) Nucleophilic substitution

Last Answer : Electrophilic substitution

Bleaching powder is prepared by passing – (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Description : Bleaching powder is prepared by passing – (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Last Answer : (1) Chlorine over slaked lime Explanation: Calcium hypochlorite (bleaching powder) is manufactured by the calcium process: 2Cl2 + 2Ca(OH)2 (slaked lime) Ca(OCl)2 + CaCl2 + 2H2O. Bleaching powder is actually a mixture of calcium hypochlorite and the basic chloride with some slaked lime.

Bleaching powder is prepared by passing : (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Description : Bleaching powder is prepared by passing : (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Last Answer : Chlorine over slaked lime

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

Industrial production of chloroform requires acetone and (A) Phosgene (B) Calcium hypochlorite (C) Chlorine (D) Ammonium chloride

Description : Industrial production of chloroform requires acetone and (A) Phosgene (B) Calcium hypochlorite (C) Chlorine (D) Ammonium chloride

Last Answer : (B) Calcium hypochlorite

Which among the following is a covalent compound? (1) Calcium chloride (2) Magnesium fluoride (3) Sodium chloride (4) Carbon tetrachloride

Description : Which among the following is a covalent compound? (1) Calcium chloride (2) Magnesium fluoride (3) Sodium chloride (4) Carbon tetrachloride

Last Answer : (4) Carbon tetrachloride Explanation: Ionic compounds are made up of a metal and non-metal, and covalent compounds are made up of two nonmetals

Name the technique used to separate water from carbon tetrachloride?

Description : Name the technique used to separate water from carbon tetrachloride?

Last Answer : Water and carbon tetrachloride could be separated using a separating funnel, since the two are immiscible and heavier carbon tetrachloride forms the lower layer.

Which of the following compounds has maximum dipole moment?(a) p-Dichlorobenzene (b) m-Dichlorobenzene (c) o-Dichlorobenzene (d) Carbon tetrachloride

Description : Which of the following compounds has maximum dipole moment? (a) p-Dichlorobenzene (b) m-Dichlorobenzene (c) o-Dichlorobenzene (d) Carbon tetrachloride

Last Answer : o-Dichlorobenzene

Which of the following molecules will decolorize bromine in carbon tetrachloride most readily? (a) 1,2-Dimethylcyclopropane (b) Cyclopentane (c) 1,2-Dimethylcyclobutane (d) Cyclohexane

Description : Which of the following molecules will decolorize bromine in carbon tetrachloride most readily? (a) 1,2-Dimethylcyclopropane (b) Cyclopentane (c) 1,2-Dimethylcyclobutane (d) Cyclohexane

Last Answer : 1,2-Dimethylcyclopropane

Which of the following will give a negative test when treated with bromine in carbon tetrachloride? (a) Butane (b) 2-Butene (c) 1,3-Butadiene (d) 2-Butyne

Description : Which of the following will give a negative test when treated with bromine in carbon tetrachloride? (a) Butane (b) 2-Butene (c) 1,3-Butadiene (d) 2-Butyne

Last Answer : Butane

. In which solvent are alkenes most soluble? (a) water (b) ethyl alcohol (c) ammonia (d) carbon tetrachloride

Description : . In which solvent are alkenes most soluble? (a) water (b) ethyl alcohol (c) ammonia (d) carbon tetrachloride

Last Answer : carbon tetrachloride

Which of the following would be least soluble in water? w) Carbon Tetrachloride x) Sodium Oxide y) Magnesium Bromide z) Potassium Phosphate

Description : Which of the following would be least soluble in water? w) Carbon Tetrachloride x) Sodium Oxide y) Magnesium Bromide z) Potassium Phosphate

Last Answer : ANSWER: W -- CARBON TETRACHLORIDE 

Which one of the following molecules exhibits resonance? w) Carbon Tetrachloride x) Carbonate ion y) Sulfur Dichloride z) Phosphorus Tribromide

Description : Which one of the following molecules exhibits resonance? w) Carbon Tetrachloride x) Carbonate ion y) Sulfur Dichloride z) Phosphorus Tribromide

Last Answer : ANSWER: X -- CARBONATE ION

This noncombustible liquid in its dry form is noncorrosive to common metals except aluminum. About 90% of all of this material which is manufactured goes into the production of chlorofluorocarbons. Is this substance: w) carbon tetrachloride x) methylene chloride y) hydrogen chloride z) methyl fluoride

Description : This noncombustible liquid in its dry form is noncorrosive to common metals except aluminum. About 90% of all of this material which is manufactured goes into the production of chlorofluorocarbons. ... substance: w) carbon tetrachloride x) methylene chloride y) hydrogen chloride z) methyl fluoride

Last Answer : ANSWER: W -- CARBON TETRACHLORIDE

Which among the following is a covalent compound ? (1) Calcium chloride (2) Magnesium fluoride (3) Sodium chloride (4) Carbon tetrachloride

Description : Which among the following is a covalent compound ? (1) Calcium chloride (2) Magnesium fluoride (3) Sodium chloride (4) Carbon tetrachloride

Last Answer : Carbon tetrachloride

(a) Define a balanced chemical equation. Why should an equation be balanced? (b) Write the balanced chemical equation for the following reaction: (i) Phosphorus burns in presence of chlorine to form phosphorus penta chloride. (ii) Burning of natural gas. (iii) The process of respiration. -Chemistry

Description : (a) Define a balanced chemical equation. Why should an equation be balanced? (b) Write the balanced chemical equation for the following reaction: (i) Phosphorus burns in presence of chlorine to form phosphorus penta chloride. (ii) Burning of natural gas. (iii) The process of respiration. -Chemistry

Last Answer : Answer. (a) Balanced chemical equation has an equal number of atoms of different elements in the reactants and products. According to law of conservation of mass, matter can neither be created nor be destroyed in a chemical ... C6H12O6 (s) + 6O2 (g) + 6H2O ---> 6CO2 (aq) + 12H2O (l) + energy

How many monochlorination products are possible in the reaction of 2,2- dimethylbutane with chlorine in the presence of ultraviolet light? (a) 2 (b) 3 (c) 4 (d) 5

Description : How many monochlorination products are possible in the reaction of 2,2- dimethylbutane with chlorine in the presence of ultraviolet light? (a) 2 (b) 3 (c) 4 (d) 5

Last Answer : 2

How many monochlorinated isomers would result from the reaction of chlorine with n-butane in the presence of UV light? (a) 2 (b) 4(c) 6 (d) 8

Description : How many monochlorinated isomers would result from the reaction of chlorine with n-butane in the presence of UV light? (a) 2 (b) 4 (c) 6 (d) 8

Last Answer : 2