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 : Out of the following, copper vessels are the most suitable for the storage of (A) Bromine (B) Dry chlorine & dry fluorine (C) Nitric acid (95% and fuming) (D) Phosphoric acid (95%) & sulphuric acid (95% and fuming)
Last Answer : (B) Dry chlorine & dry fluorine
Description : Containers made of high silicon cast iron (14% Si) are not suitable for the storage of (A) Acetic acid (B) Benzoic & boric acids (C) Phosphoric acid (95%) & sulphuric acid (95%) (D) Hydrochloric acid (concentrated)
Last Answer : (D) Hydrochloric acid (concentrated)
Description : Cast iron vessels are not suitable for the storage of (A) Freon (B) H2SO4 (95%) at room temperature (C) H2SO4 (fuming) (D) Wet SO2
Last Answer : (D) Wet SO2
Description : Mild steel storage vessels are suitable for the storage of (A) Anhydrous ammonia (B) Fatty acids (C) Hydrochloric acid (95%) (D) Sulphuric acid (25%)
Last Answer : (A) Anhydrous ammonia
Description : Nickel made/clad equipments are suitable for handling (A) Ammonia (both aqueous & anhydrous) (B) Fruit juices, milk & its products and caustic soda solution (C) Nitric acid & hydrochloric acid (concentrated) (D) Sulphuric acid (concentrated)
Last Answer : (B) Fruit juices, milk & its products and caustic soda solution
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 : Reaction of phosphate rock with 98% H2SO4 produces (A) Ortho-phosphoric acid (B) Superphosphate (C) White phosphorous (D) None of these
Last Answer : (A) Ortho-phosphoric acid
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 : Glass lined vessels are not used for handling/storing (A) Dilute H2SO4 (B) Dilute HNO3 (C) Dilute HCl (D) Hydrofluoric acid
Last Answer : (D) Hydrofluoric acid
Description : Reaction of anhydrous liquid ammonia with ortho-phosphoric acid produces (A) Ammonium phosphate (B) Superphosphate (C) Triple superphosphate (D) None of these
Last Answer : (A) Ammonium phosphate
Description : Nitric acid is produced on commercial scale in a fertiliser plant by (A) Oxidation of ammonia (B) CaNO3 + H2SO4 reaction (C) Passing air through high voltage electric arc (D) None of these
Last Answer : (A) Oxidation of ammonia
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
Last Answer : (A) Bile Salts
Description : For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is (A) Stainless steel (B) Cast iron (C) Aluminium (D) Nickel
Last Answer : (B) Cast iron
Description : What steps can be taken to avoid stress corrosion cracking (SCC) in steel vessels used for storing anhydrous ammonia?
Last Answer : The U.S. National Board of Pressure Vessel Inspectors recommends the following in one of their classic articles: 1. Pressure vessels should be fully stress relieved or fabricated with heads that ... at least 0.2 percent water to inhibit SCC. Source: National Board of Pressure Vessel Inspectors
Description : What type of container is best for storing flour?
Last Answer : If you havent opened the paper bag it was sold in, that will do, but if you've opened the original bag, it's better to put the flour in a plastic resealable bag like a Zip-Lock bag. Always store the flour in a cool, dry, and dark location.
Description : Ammonia gas can be dried by (A) PCl5 (B) Quick lime (C) CaCl2 (D) Concentrated H2SO4
Last Answer : (B) Quick lime
Description : Propyne reacts with aqueous H2SO4 in the presence of HgSO4 to form (a) acetone (b) 1-propanol (c) acetaldehyde (d) 2-propanol
Last Answer : acetone
Description : The most suitable vessel for storing concentrated sulphuric acid is – (1) Copper vessel (2) Aluminium vessel (3) Glass vessel (4) Earthen vessel
Last Answer : (3) Glass vessel Explanation: Concentrated Sulfuric acid can only be stored in glass, no metal lids, some plastic containers. It will attack anything organic, causing severe burns, the good thing is it ... but if it goes into contact with a metal it may generate hydrogen gas, an explosion risk.
Description : The most suitable vessel for storing concentrated sulphuric acid is (1) Copper vessel (2) Aluminium vessel (3) Glass vessel (4) Earthen vessel
Last Answer : Glass vessel
Description : Which of the following would not be a suitable material of construction for handling aqueous hydrofluoric acid (HF) at 100°C? (A) Monel (B) Stainless steel (C) Graphite (D) Kel-F and Teflon
Last Answer : (B) Stainless steel
Description : Polyvinyl chloride containers are not suitable for storing (A) Foodstuffs (B) Woolen clothes (C) Metallic powder (D) None of these
Last Answer : (A) Foodstuffs
Description : For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of (a) copper (b) aluminium (c) steel (d) brass
Last Answer : Ans: c
Description : Would I be violating your community's open container laws if I stopped to pick up a discarded beer can or vodka bottle while walking?
Last Answer : answer:If I am not mistaken, at least in my jurisdiction, the key point is not the container, but the alcohol itself. In other words, I can be arrested if I am carrying my vodka tonic in a ... be some risk. But a reasonable policeman would take that into account. And probably have you pour it out.
Description : Why are wine and beer exempt from having to post calorie/nutrition info on the container?
Last Answer : Great question. Not sure why. Fruit juices have calorie/nutrition but not beer/wine.
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 : Cemented carbide tools are not suitable for cutting (A) Aluminium (B) Brass (C) Cast iron (D) Steel
Last Answer : (A) Aluminium
Description : NaH2PO4 Why ammonia in aqueous solution ?
Last Answer : NaH₂PO₄ is acidic in aqueous solution . This is because in aqueous solution it decomposes and produces ions. Since H₂PO₄ is acidic in NaH₂PO₄ → Na + + H₂PO₄ , the aqueous solution is also acidic.
Description : Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` and `NH_(4)Cl` gives an octahedral complex Y in the pre
Last Answer : Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` ... solution is pink D. Z is a tetrahedral complex.
Description : One property of ammonia is – (1) It is insoluble in water (2) it is a odourless gas (3) It is a yellowish gas (4) Its aqueous solution turns red litmus blue
Last Answer : (4) Its aqueous solution turns red litmus blue Explanation: The main use of litmus is to test whether a solution is acidic or basic. For instance, ammonia gas, which is alkaline, colours the red litmus paper blue.
Description : Which of the following is the strongest base in aqueous solution? (1) Diethylamine (2) Triethylamine (3) Ammonia (4) Ethylamine
Last Answer : (1) Diethylamine Explanation: Amines are organic derivatives of ammonia, in which one, two, or all three of the hydrogens of ammonia are replaced by organic groups. All aliphatic primary amines are stronger bases than ammonia.
Description : FeSO4 solution mixed with (NH4 ) 2 SO4 solution in 1 : 1 molar ratio gives the test of Fe2+ ion but CuSO4 solution mixed with aqueous ammonia in 1 : 4 molar ratio does not give the test of Cu2+ ion. Explain why ?
Last Answer : When FeSO4 and (NH4 ) 2 SO4 solution are mixed in 1 : 1 molar ratio, a double salt is formed. It has the formula FeSO4 (NH4 ) 2 SO4 . 6 H2O. In aqueous solution, the salt dissociates. When CuSO4 and NH3 are mixed in the molar ratio of 1 : 4 in solution, a complex [Cu (NH3 ) 4 ] SO4 is formed.
Description : Which of the following is a strong electrolyte in aqueous solution. w) ammonia x) coffee y) Gatorade z) corn syrup
Last Answer : ANSWER: Y -- GATORADE
Description : Which of the following is the strongest base in aqueous solution ? (1) Diethylamine (2) Triethylamine (3) Ammonia (4) Ethylamine
Last Answer : Diethylamine
Description : One property of ammonia is (1) It is insoluble in water (2) It is a odourless gas (3) It is a yellowish gas (4) Its aqueous solution turns red litmus blue
Last Answer : Its aqueous solution turns red litmus blue
Description : For concentrating an aqueous solution of a material like anhydrous Na2SO4, whose solubility decreases with rise in temperature, the most suitable evaporator is a __________ evaporator. (A) High pressure (B) Vacuum (C) Backward feed (D) None of these
Last Answer : (B) Vacuum
Description : Silicone rubber is not resistant to the corrosive action of (A) Sulphuric acid (10%) (B) Sulphuric acid (95%) (C) Ether (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : Rubber lined vessels are corroded by the action of (A) Aqua regia (B) Chloroform (C) Sulphuric acid (95%) (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Polythene (low or high density) containers are not corroded by (A) Sulphuric acid (10%) at room temperature (B) Nitric acid (95%) at room temperature (C) Sulphur trioxide at 60°C (D) Any of these
Last Answer : (A) Sulphuric acid (10%) at room temperature
Description : Teflon (PTFE) is corroded by (A) Hydrochloric acid (10%) (B) Hydrochloric acid (95%) (C) Sulphuric acid (D) None of these
Last Answer : (D) None of these
Description : Catalyst used in the isomerisation is (A) Aluminium chloride (B) Alumina (C) Nickel (D) Phosphoric acid
Last Answer : (A) Aluminium chloride
Description : Catalyst used in the catalytic polymerisation is (A) Phosphoric acid on kieselguhr (B) Aluminium chloride (C) Nickel (D) Vanadium pentoxide
Last Answer : (A) Phosphoric acid on kieselguhr
Description : Platinum and silver are corroded by (A) Caustic soda solution (B) Phosphoric acid (C) Sulphuric acid (10%) (D) None of these
Description : Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with (A) Acidic refractory (B) Rubber (C) Karbate (D) Lead or acid proof bricks
Last Answer : (A) Acidic refractory
Description : Glass is corroded by (A) Fluorine (dry or wet) (B) Sulphuric acid (C) Phosphoric acid (D) None of these
Last Answer : (A) Fluorine (dry or wet)
Description : Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with (A) Acidic refractory (B) Rubber (C) Karbate (D) Lead or acid-proof bricks
Last Answer : (D) Lead or acid-proof bricks
Description : CaH4 (PO4 )2 is the chemical formula of (A) Superphosphate (B) Triple superphosphate (C) Calcium phosphate (D) Meta phosphoric acid
Last Answer : (B) Triple superphosphate
Description : Reaction of ortho-phosphoric acid with phosphate rock produces (A) Superphosphate (B) Triple superphosphate (C) Meta-phosphoric acid (D) Monoammonium phosphate
Description : Action of phosphoric acid on rock phosphate produces (A) Superphosphate (B) Triple superphosphate (C) Nitrophosphate (D) Diammonium phosphate