Description : The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant? (A) Chlorine (B) Alkalis (C) Benzene hexachloride (D) Alkyl benzene sulphonate (ABS)
Last Answer : (A) Chlorine
Description : Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes (A) Fire hazards (B) Explosion hazards (C) Persistent foam (D) Depletion of dissolved oxygen
Last Answer : (C) Persistent foam
Description : Which of the following is a detergent? (A) Benzene hexachloride (B) Alkyl benzene sulphonate (C) Polytetrafluoroethylene (D) Cellulose nitrate
Last Answer : (B) Alkyl benzene sulphonate
Description : Aryl benzene sulphonate (ABS) is a (A) Detergent (B) Plasticiser for unsaturated polyester (C) Starting material for the synthesis of glycerine (D) Coating ingredient for photographic film
Last Answer : (A) Detergent
Description : The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent. (A) Cationic (B) Anionic (C) Amphoteric (D) Semi polar
Last Answer : (B) Anionic
Description : Which of the following is not a correct statement concerning the FriedelCrafts acylation of benzene? (a) An alkyl group substitutes for a hydrogen. (b) The benzene ring attacks an acylium ion. (c) The acylium ion is resonance stabilized. (d) The acylium ion is often produced from an acyl chloride.
Last Answer : An alkyl group substitutes for a hydrogen
Description : Which of the following reagents cannot be used to prepare an alkyl chloride from an alcohol? (a) HCl + ZnCl2 (b) SOCl2 (c) NaCl (d) PCl5
Last Answer : NaCl
Description : Alkylbenzene sulfonate (ABS) is a (A) Detergent (B) Rubber (C) Pesticide (D) Polyester
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
Description : Benzene is used (A) As a motor fuel (B) As an explosive (C) For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR) (D) As a perfume
Last Answer : (C) For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR) (D) A
Description : Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction. (A) Endothermic (B) Exothermic (C) Irreversible (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : Molasses is the starting material for the production of (A) Alcohol (B) Essential oil (C) Fatty acids (D) Massecuite
Last Answer : (A) Alcohol
Description : The basic constituent of vegetable oils is (A) Triglyceride (B) Fatty acids (C) Fatty alcohol (D) Mono esters
Last Answer : (A) Triglyceride
Description : Esters of fatty acids with higher alcohol other than glycerol are called as (A) Oils (B) Polyesters (C) Waxes (D) Terpenoids
Last Answer : Answer : C
Description : What are soaps? (1) Salts of silicates (2) Ester of heavy fatty acids (3) Sodium or potassium salts of heavier fatty acids (4) Mixture of glycerol and alcohol
Last Answer : (3) Sodium or potassium salts of heavier fatty acids
Description : Which of the following best describes the carbon-chlorine bond of an alkyl chloride? (a) nonpolar; no dipole (b) polar; δ+ at carbon and δ– at chlorine (c) polar; δ– at carbon and δ+ at chlorine (d) ionic
Last Answer : polar; δ+ at carbon and δ– at chlorine
Description : Assertion: Phosphorus tribromide is ofter preferred as a reagent for the transformation of an alcohol to the corresponding alkyl bromide Reason: The n
Last Answer : Assertion: Phosphorus tribromide is ofter preferred as a reagent for the transformation of an alcohol to ... D. Assertion is false, Reason is true
Description : The alkyl radical in plasmalogen is an alcohol: (A) Saturated (B) Unsaturated (C) Both (A) and (B) (D) None of these
Last Answer : Answer : A
Description : Which reaction does not yield an ester as one of the products? (a) A carboxylic acid is heated with an alcohol (b) A Grignard reagent is added to a carboxylic acid (c) An acid halide is treated with an alcohol (d) An alkyl halide is heated with the salt of a carboxylic acid
Last Answer : A Grignard reagent is added to a carboxylic acid
Description : Which of the following terms best describes the compound below? CH3(CH2)7CH=CH(CH2)7CO2H (a) an unsaturated fatty acid (b) a triglyceride (c) a synthetic detergent (d) a micelle
Last Answer : an unsaturated fatty acid
Description : Styrene which is a monomer for the production of polystyrene, is commercially produced by the (A) Catalytic dehydrogenation of ethyl benzene (B) Dehydration of ethyl alcohol followed by hydrogenation (C) Reacting ethylene oxide with acetaldehyde (D) Fermentation of starch
Last Answer : (A) Catalytic dehydrogenation of ethyl benzene
Description : A minimum boiling azeotrope is exemplified by (A) Toluene-benzene (B) Acetone-carbon disulphide (C) Water-isobutyl alcohol (D) None of these
Last Answer : (B) Acetone-carbon disulphide
Description : Pick out the system with minimum boiling azeotrope at 1 atm. (A) Benzene-toluene (B) Ethyl alcohol-water (C) Hydrochloric acid-water (D) All (A), (B) and (C)
Last Answer : (B) Ethyl alcohol-water
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
Description : __________ is produced by the dehydrogenation of ethyl benzene. (A) Styrene (B) Ethyl alcohol (C) Cumene (D) Phenol
Last Answer : (A) Styrene
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
Description : Maleic anhydride is produced by catalytic oxidation of (A) Toluene (B) Ethyl alcohol (C) Naphthalene (D) Benzene
Last Answer : (D) Benzene
Description : Styrene (a monomer for the production of polystyrene) is commercially produced by (A) Catalytic dehydrogenation of ethyl benzene (B) Dehydration of ethyl alcohol followed by hydrogenation (C) Reacting ethylene oxide with acetaldehyde (D) Fermentation of starch
Description : Which of the following chemicals are halogens used for disinfection? a. Phenol b. Alcohol c. Detergent d. Chlorine
Last Answer : d. Chlorine
Description : Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at `25^(@) C`. For this process, the correct statement is
Last Answer : Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at `25^(@) C` ... of temperature. D. The adsorption is irreversible.
Description : Why are stains such as methylene blue and iodine solution used when observeing cells under the microscope?
Last Answer : What is the answer ?
Description : Methylene blue test?
Last Answer : DefinitionThe methylene blue test is used to determine the type of the blood disorder, methemoglobinemia.How the test is performedThe health care provider wraps a tourniquet or blood pressure cuff around your ... tube into your vein. The health care provider looks at how the powder turns a subst
Description : For the synthesis of TMP from dump, a coenzyme is required which is (A) N10- Formyl tetrahydrofolate (B) N5- Methyl tetrahydrofolate (C) N5, N10- Methylene tetrahydrofolate (D) N5- Formimino tetrahydrofolate
Description : Neogenesis of methyl group is (A) The availability of methyl group form δ adenosyl methionine (B) The availability of methyl group from betaine (C) Interaction between N5 N10 methylene tetra hydrofolate with a NAD+ dependent reductase (D) Availability of methyl group from methyl B12
Description : Which of the following correctly ranks the cycloalkanes in order of increasing ring strain per methylene? (a) cyclopropane < cyclobutane < cyclohexane < cycloheptane (b) cyclohexane < ... < cyclobutane < cyclopentane < cyclopropane (d) cyclopentane < cyclopropane < cyclobutane < cyclohexane
Last Answer : cyclohexane < cyclopentane < cyclobutane < cyclopropane
Description : Methylene blue staining of metachromatic granules is diagnostic for which of the following bacteria? a. Mycobacterium Tuberculosis b. Coiynebacterium Diphtheriae c. Chlamydia Pneumoniae d. Bordetella Pertussis
Last Answer : b. Coiynebacterium Diphtheriae
Description : Active methylene compounds are called as….. a. H-acid b. C-acid c. mineral acid d. Proton sponge
Last Answer : b. C-acid
Description : Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid ? (1) Methylene blue (2) Methyl red (3) Phenolphthaline (4) Methyl orange
Last Answer : Methyl orange
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 : 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
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
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
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
Description : Benzenediazonium chloride can be converted into benzene on treatment with:
Last Answer : Benzenediazonium chloride can be converted into benzene on treatment with: A. `H_(3)PO_(3)` B. `H_(3)PO_(4)` C. `H_(3)PO_(2)` D. `HPO_(3)`
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.
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
Description : Benzene diazonium chloride on hydrolysis gives
Last Answer : Benzene diazonium chloride on hydrolysis gives A. Benzene B. Benzyl alcohol C. Phenol D. Chlorobenzene
Description : Which of the following reactions does not produce benzene as one of the products? (a) Treating benzenediazonium chloride with H3PO2 (b) Distilling phenol with zinc dust (c) Fusing sodium benzoate with NaOH (d) Fusing sodium benzenesulfonate with NaOH
Last Answer : Fusing sodium benzenesulfonate with NaOH
Description : Benzenediazonium chloride reacts with hypophosphorus acid to form : (a) Phenol (b) Benzaldehyde (c) Aniline (d) Benzene
Last Answer : Benzene
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