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 : DDT is prepared by the reaction of chlorobenzene with (in the presence of conc. H2SO4) (a) Chloral (b) Chlorine (c) Chloroform (d) Carbon tetrachloride
Last Answer : Chloral
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
Description : The catalyst used in the manufacture of DDT is (A) Alumina (B) Silica (C) 20% oleum (D) Aluminium chloride
Last Answer : (C) 20% oleum
Description : Chloral is used in the manufacture of (A) DDT (B) BHC (C) Parathion (D) None of these
Last Answer : (A) DDT
Description : Pick out the wrong statement. (A) Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80% (B) Contact process of sulphuric acid manufacture produces pure acid of ... of 20% oleum (D) Contact process of sulphuric acid manufacture uses nickel as the catalyst
Last Answer : (D) Contact process of sulphuric acid manufacture uses nickel as the catalyst
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
Description : Which of the following agents is used in order to make benzene react with concentrated nitric acid to give nitrobenzene? (a) Concentrated H2SO4 (b) FeCl3 catalyst (c) Lindlar's catalyst (d) Ultraviolet light
Last Answer : Concentrated H2SO4
Description : Pick out the wrong statement. (A) Dehydration of ammonium carbamate to produce urea is endothermic (B) Direct use of liquid ammonia as a fertiliser for a tropical country like India ... manufacture of ortho-phosphoric acid (D) Phosphate rock when reacted with dilute H2SO4 produces superphosphate
Last Answer : (B) Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable
Description : In the manufacture of H2SO4 , vanadium catalyst as compared to platinum catalyst (A) Gives higher conversion efficiency (B) Has a longer life and is not poisoned by arsenic (C) Handles lower SO2 content gas (7 -10% SO2 ), thus increasing the capital cost of the plant (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
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
Description : Which is the most efficient absorbent for SO3 out of the following? (A) 20% oleum (B) 65% oleum (C) 78% H2SO4 (D) 98% H2SO4
Last Answer : (D) 98% H2SO4
Description : 10% oleum comprises of 10% free (A) SO2 (B) H2SO3 (C) SO3 (D) H2SO4
Last Answer : (C) SO3
Description : More than 100 percent of __________ is present in oleum. (A) SO3 (B) H2SO4 (C) H2SO3 (D) SO2
Last Answer : (B) H2SO4
Description : Sulphuric acid saturated with SO3 is called (A) Concentrated H2SO4 (B) Sulphurous acid (C) Oleum (D) None of these
Last Answer : (C) Oleum
Description : Oleum produces fumes of (A) SO2 (B) H2SO4 (C) SO3 (D) SO2 + H2SO4
Description : Chemical formula of oleum is (A) H2SO3 (B) H2SO4 (C) H2S2O7 (D) H2SO7
Last Answer : (C) H2S2O7
Description : 20% oleum means that in 100 kg oleum, there are 20 kg of (A) SO3 and 80kg of H2SO4 (B) H2SO4 and 80kg of SO3 (C) SO3 for each 100 kg of H2SO4 (D) None of these
Last Answer : (A) SO3 and 80kg of H2SO4
Description : Sulphuric acid completely saturated with sulphur trioxide is called (A) Concentrated sulphuric acid (B) Oleum (C) Sulphurous acid (D) Dilute sulphuric acid
Last Answer : (A) Concentrated sulphuric acid
Description : Benzenediazonium chloride reacts with phenol to form : (a) p-chlorophenol (b) Chlorobenzene (c) p-Hydroxyazobenzene (d) DDT
Last Answer : p-Hydroxyazobenzene
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
Description : Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the (A) Fertiliser manufacture (B) Car battery solution (C) Synthesis of oleum (D) Water treatment
Last Answer : (B) Car battery solution
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
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
Description : Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2 . Lead pipes are readily corroded by (A) Dilute HCI (B) Acetic acid (C) Concentrated H2SO4 (D) None of these
Last Answer : (B) Acetic acid
Description : Glass lined vessels are not used for handling (A) Dilute H2SO4 (B) Dilute HNO3 (C) Dilute HCI (D) Hydrofluoric acid
Last Answer : (D) Hydrofluoric acid
Description : Glass lined vessels are not used for handling/storing (A) Dilute H2SO4 (B) Dilute HNO3 (C) Dilute HCl (D) Hydrofluoric acid
Description : Centrifugal pump made of pyrex or glass can't be used to pump (A) Milk and fruit juices (B) Alkaline solutions (C) Dilute H2SO4 at room temperature (D) Brine
Last Answer : (B) Alkaline solutions
Description : Lead pipes are not safe for carrying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)2 . Lead pipes are readily corroded by (A) Dilute HCl (B) Acetic acid (C) Concentrated H2SO4 (D) None of these
Description : Leaching of sugar from sugar beets is done by (A) Hot water (B) Hexane (C) Dilute H2SO4 (D) Lime water
Last Answer : (A) Hot water
Description : Leaching of coffee from coffee beans is done by (A) Hot water (B) Hexane (C) Lime water (D) Dilute H2SO4 (hot)
Description : Which of the following has the lowest Prandtl number? (A) Molten sodium (a coolant used in fast breeder reactor) (B) Water (C) Transformer oil (D) Dilute H2SO4
Last Answer : (A) Molten sodium (a coolant used in fast breeder reactor)
Description : Flushing liquor used for cooling coke oven gas constitutes of (A) Ammoniacal liquor (B) K2CO3 solution (C) Dilute H2SO4 (D) Dilute HCl
Last Answer : (A) Ammoniacal liquor
Description : Phosphoric acid is produced in wet process from phosphate rock and (A) Dilute H2SO4 (B) Concentrated H2SO4 (C) Concentrated NHO3 (D) Concentrated HCl
Last Answer : (A) Dilute H2SO4
Description : H2S is scrubbed from refinery gases by absorption using (A) Dilute H2SO4 (B) Ethanol amine (C) Chilled water (D) Tri-butyl phosphate
Last Answer : (B) Ethanol amine
Description : DDT should not be allowed to come in contact with iron (during itsmanufacture) to (A) Avoid its decomposition (B) Prevent sulphonation of the monochlorobenzene by the acid catalyst (C) Achieve non-hygroscopic property (D) None of thes
Last Answer : (A) Avoid its decomposition
Description : Which of the following agents is used in order to make benzene react with bromine to give bromobenzene? (a) Ultraviolet light (b) Fe catalyst (c) Nickel catalyst (d) Al2O3 catalyst
Last Answer : Fe catalyst
Description : Which of the following agents is used in order to make benzene react with acetyl chloride to give acetophenone? (a) Ultraviolet light (b) AlCl3 catalyst (c) Platinum catalyst (d) Al2O3 catalyst
Last Answer : AlCl3 catalyst
Description : Why does not silver evolve h2 on reacting with dilute h2so4?
Last Answer : Need answer
Description : Which of the following reagents will react with furan to form 2-furansulfonic acid? (a) SO3 in pyridine at 100°C (b) Dilute H2SO4 at 200°C (c) SO2 at 100°C (d) Dilute H2SO4 at 100°C
Last Answer : SO3 in pyridine at 100°C
Description : A compound, C4H6, reacts with bromine and forms a white precipitate with ammoniacal silver nitrate solution. It reacts with dilute H2SO4 in the presence of mercuric sulfate to form 2-butanone. The compound could be (a) 1-Butyne (b) 1-Butene (c) 2-Butyne (d) 2-Butene
Last Answer : 1-Butyne
Description : Concentration of H2SO4 catalyst in alkylation is kept between 90-98%, because H2SO4 having concentration. (A) Less than 90% promotes polymerisation (B) More than 98% promotes cracking (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : Catalyst used in isomerisation process is (A) H2SO4 (B) H3PO4 (C) HF (D) AlCl3
Last Answer : (D) AlCl3
Description : Catalyst used in catalytic polymerisation which produces polymergasoline is (A) H2SO4 (B) H3PO4 (C) Both (A) and (B) (D) AlCl3
Description : The chlorinator used in the manufacture of DDT is made of (A) Glass (B) Glass lined steel (C) Teflon (D) Bakelite
Last Answer : (B) Glass lined steel
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 : In the manufacture of ortho-phosphoric acid by strong H2SO4 leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesirable (A) CaSO4 .½ H2O and CaSO4 crystals (B) Pyrophosphoric acid (C) Meta-phosphoric acid (D) All (A), (B) and (C)
Last Answer : (A) CaSO4 .½ H2O and CaSO4 crystals
Description : During manufacture of H2SO4 , the oxidation of SO2 to SO3 by oxygen is an endothermic reaction. The yield of SO3 will be maximised, if the (A) Temperature is increased (B) Pressure is reduced (C) Temperature is increased and pressure is reduced (D) Temperature is reduced and pressure is increased
Last Answer : (D) Temperature is reduced and pressure is increased
Description : In the converter of the contact process for the manufacture of H2SO4 the equilibrium conversion of SO2__________ (i) __________ with increase in temperature and __________ (ii) __________ with increase in the mole ratio ... increases (C) (i) increases (ii) increases (D) (i) decreases (ii) decreases
Last Answer : (B) (i) decreases (ii) increases
Description : Viscose rayon (A) Cannot be made from sulphite pulp (B) Utilises H2SO4 , NaOH and CS2 during its manufacture (C) Cannot yield textile grade fibre (D) None of these
Last Answer : (B) Utilises H2SO4 , NaOH and CS2 during its manufacture