Description : In the nitration of benzene with a mixture of conc. `HNO_(3)` and conc. `H_(2)SO_(4)`, the active species involved is :
Last Answer : In the nitration of benzene with a mixture of conc. `HNO_(3)` and conc. `H_(2)SO_(4)`, ... ion B. nitrate ion C. nitronium ion D. nitrogen dioxide
Description : A metal salt solution gives a yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as well as in ammonium hydroxide
Last Answer : A metal salt solution gives a yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as ... (3-)` D. `SO_(4)^(2-)`
Description : When a mixture of solid NaCl, solid `K_(2)Cr_(2)O_(7)` is heated with conc. `H_(2)SO_(4)` orange red vapours are obtained. These are of the compound
Last Answer : When a mixture of solid NaCl, solid `K_(2)Cr_(2)O_(7)` is heated with conc. `H_(2 ... B. chromyl chloride C. chromic chloride D. chromic sulphate
Description : When a mixture containing `PCl_(3)` and `PCl_(5)` is heated with ethyl alcohol, a total of 4 moles of ehtyl chloride is formed. Mole ratio of `PCl_(3)
Last Answer : When a mixture containing `PCl_(3)` and `PCl_(5)` is heated with ethyl alcohol, a total of 4 moles of ehtyl chloride is ... : 1` C. `1 : 3` D. `2 : 1`
Description : Aniline reacts with mixed acid (conc. `HNO_(3)` and conc. `H_(2)SO_(4)`) at 288 K to give P (51%), Q (47%) and R(2%). The major product (s) of the fol
Last Answer : Aniline reacts with mixed acid (conc. `HNO_(3)` and conc. `H_(2)SO_(4)`) at 288 K to give P ... of the following reaction sequence is (are) B. C. D.
Description : Which gas is evolved when `PbO_(2)` is treated with conc `HNO_(3)` ?
Last Answer : Which gas is evolved when `PbO_(2)` is treated with conc `HNO_(3)` ? A. `NO_(2)` B. `O_(2)` C. `N_(2)` D. `N_(2)O`
Description : Cold conc. `HNO_(3)` will completely dissolve: (i) Pb (ii) `Pb_(3)O_(4)` (iii) Fe (iv) Sn (v) Mg (vi) MgO (vii) Hg (viii) Au (ix) Ag (x) Pt
Last Answer : Cold conc. `HNO_(3)` will completely dissolve: (i) Pb (ii) `Pb_(3)O_(4)` (iii) Fe (iv) Sn (v) Mg (vi) MgO (vii) Hg (viii) Au (ix) Ag (x) Pt
Description : Phenol `underset("distillation")overset("Zinc")(rarr)(A)underset("conc."HNO_(3) "at 333K")overset("conc." HNO_(3))(rarr)(B)underset("NaOH")overset(Zn)
Last Answer : Phenol `underset("distillation")overset("Zinc")(rarr)(A)underset("conc."HNO_(3) "at 333K" ... -nitroaniline D. toluene, m-nitrobenzene and m-toulidine
Description : `"phenol" overset(conc.H_(2)SO_(4))rarrA overset(conc.HNO_(3))rarrB` Here A and B are respectively.
Last Answer : `"phenol" overset(conc.H_(2)SO_(4))rarrA overset(conc.HNO_(3))rarrB` Here A and B ... 4-dinitrophenol D. 3-Hydroxybenzene sulphonic acid, picric acid
Description : Phenol on treatment with conc. `HNO_(3)` gives
Last Answer : Phenol on treatment with conc. `HNO_(3)` gives A. picric acid B. o-and m-nitrophenols C. cresol D. resorcinol
Description : Anisole with conc. `HNO_(3)` and conc. `H_(2)SO_(4)` gives
Last Answer : Anisole with conc. `HNO_(3)` and conc. `H_(2)SO_(4)` gives A. Phenol B. Nitrobenzene C. O - and - P - Nitroanisole D. O- Nitroanisole
Description : Among the following the number of compounds that can act as dehydrating agent are …… `Conc. H_(2)SO_(4),"Anhyd". CaCl_(2),Conc. HNO_(3), CaO, CuSO_(4)
Last Answer : Among the following the number of compounds that can act as dehydrating agent are `Conc. H_(2)SO_(4),"Anhyd" ... CaO, CuSO_(4).5H_(2)O, P_(2)O_(5)`
Description : Which of the following carbohydrates will not give a red precipitate of Cu2O when heated with Benedict's solution? (a) Maltose (b) Glucose (c) Sucrose (d) Fructose
Last Answer : Sucrose
Description : Which of the following option is incorrect about the sludges? a) Sludges are soft, loose and slimy precipitate b) They are non-adherent deposits and can be easily removed c) Formed generally at heated portions of the boiler d) Can be removed by blow down operation
Last Answer : c) Formed generally at heated portions of the boiler
Description : What is the precipitate formed between barium nitrate and potassium phosphate?
Last Answer : The precipitate is barium phosphate - Ba3(PO4)2, very low soluble in water.
Description : Heating a mixture of phosphate rock, coke and sand in an electric furnace produces (A) Phosphoric acid (B) Ammonium phosphate (C) Phosphorous (D) Superphosphate
Last Answer : (C) Phosphorous
Description : What concentration of `Ag^(+)` ions will be in equilibrium with a saturated solution containing a precipitate of `Ag_(2)CrO_(4) and CrO_(4)`-ion conce
Last Answer : What concentration of `Ag^(+)` ions will be in equilibrium with a saturated solution containing a precipitate of ... D. `5.9xx10^(-6)` moles per litre
Description : Which of the following compounds yields a yellow precipitate when warmed with a mixture of iodine in aqueous sodium hydroxide? (a) Acetophenone (b) Benzaldehyde (c) Benzophenone (d) Propanal
Last Answer : Acetophenone
Description : The reagment (s) that can selectively precipitate `S^(2-)` from a mixture of `S^(2-)` and `SO_(4)^(2-)` in aqueous solution is (are)
Last Answer : The reagment (s) that can selectively precipitate `S^(2-)` from a mixture of `S^(2-)` and `SO_(4)^(2-)` in ... 3))_(2)` D. `Na_(2)[Fe(CN)_(5)NO]`
Description : A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous. (A) Salt & coke (B) Sand & coke (C) And coke (D) And sand
Last Answer : (B) Sand & coke
Description : Pick out the wrong statement. (A) Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water (B) Apatite is the principal material present in ... fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound fo
Last Answer : (C) Urea is more hygroscopic than ammonium nitrate
Description : Sodium extract is heated with concentrated `HNO_(3)` before testing for halogens because :
Last Answer : Sodium extract is heated with concentrated `HNO_(3)` before testing for halogens because : A. Ag reacts ... )` and hence do not interfere in the test.
Description : An organic compound containing one oxygen gives red colour with cerric ammonium nitrate solution , decolourise alkaline `KMnO_(4)` , respond iodoform
Last Answer : An organic compound containing one oxygen gives red colour with cerric ammonium nitrate solution , decolourise alkaline ... underset(||)(O)-CH_(3)` D.
Description : A cationic complex has two isomers A & B. Each has one Co3+, five NH3 , one Br and one SO4 2 . A gives a white precipitate with BaCl2 solution while B gives a yellow precipitate with AgNO3 ... are the possible structures of the complexes A and B ? (a) Will the two complexes have same colour ?
Last Answer : (a) [CO (NH3 ) 5 Br] SO4 and [CO (NH3 ) 5 SO4 ] Br (b) NO
Description : Which of the following alcohols will give a yellow precipitate of iodoform with iodine and dilute NaOH solution? (a) 1-Propanol (b) 2-Propanol (c) 1-Butanol (d) 2-Methyl-2-propanol
Last Answer : 2-Propanol
Description : The nitrogen containing compound produced in the reaction of `HNO_(3)` with `P_(4)O_(10)`
Last Answer : The nitrogen containing compound produced in the reaction of `HNO_(3)` with `P_(4)O_(10)` A. ... bond D. react with Na metal producing a brown gas
Description : A Unknown salt (S) when heated with dil `H_(2)SO_(4)` does not evolve brown vapours but with conc. `H_(2)SO_(4)` brown vapours are obtained. The vapou
Last Answer : A Unknown salt (S) when heated with dil `H_(2)SO_(4)` does not evolve brown vapours but with conc. `H_(2)SO_(4)` ... 3)^(-)` C. `I^(-)` D. `Br^(-)`
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 : Are heated towel rails safe All of our electric towel rails are pre-filled with a water-based solution containing a mix of central heating preservatives. What is the best price of Towel Rail per Packet?
Last Answer : Yes, our heated towel rails are safe. We have been manufacturing and selling Heated Towel Rails for nearly ten years and know what makes a great towel rail. If you are installing a heated ... will provide the correct heat output. Heated Towel Rails are now a common feature in modernized homes,
Description : In a solution containing phosphate buffer, the pH will be 7.4, if the ratio of monohydrogen phosphate : dihydrogen phosphate is (A) 4 : 1 (B) 5 : 1 (C) 10 : 1 (D) 20 : 1
Last Answer : Answer : A
Description : An organic liquid `A` containing `C,H` and `O` has a pleasant odour with a boiling point of `78^(@)C`. On boiling. A with conc. `H_(2)SO_(4)` a colour
Last Answer : An organic liquid `A` containing `C,H` and `O` has a pleasant odour with a boiling point of `78^(@)C`. On boiling ... . `C_(2)H_(5)OH` D. `C_(2)H_(6)`
Last Answer : An organic liquid `A` containing `C,H` and `O` has a pleasant odour with a boiling point of `78^(@)C`. On boiling ... . `C_(2)H_(6)` D. `C_(2)H_(5)OH`
Description : Phenol is heated with a solution of mixture of `KBr` and `KBrO_(3)`. The major product obtained in the above reaction is
Last Answer : Phenol is heated with a solution of mixture of `KBr` and `KBrO_(3)`. The major product ... Bromophenol C. 4-Bromophenol D. 2,4,6-Tribromophenol
Last Answer : Phenol is heated with a solution of mixture of `KBr` and `KBrO_(3)`. The major product obtained ... C. 4-Bromophenol D. 2, 4,6-Tribromophenol
Description : A mixture of two organic compound gives red coloured precipitate with cuprous chloride and silver mirror on heating with Zn and `NH_(4)Cl` followed by
Last Answer : A mixture of two organic compound gives red coloured precipitate with cuprous chloride and silver mirror on heating ... mixture contains : A. B. C. D.
Description : Aqua regia is a 1 : 3 mixture, by volume, of – (1) conc, nitric acid and conc. hydrochloric acid (2) conc. hydrochloric acid and conc. nitric acid (3) conc. nitric acid and cone. sulphuric acid (4) cone. sulphuric acid and cone. nitric acid
Last Answer : (1) conc. nitric acid and conc. hydrochloric acid Explanation: Aqua regia or nitro-hydrochloric acid is a highly corrosive mixture of acids, a fuming yellow or red solution. The mixture is ... , tantalum, osmium, rhodium and a few other metals are capable of withstanding its corrosive properties.
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.
Description : Aquaregia is a mixture of the following in the ratio 1 : 3 by volume (1) conc. HNO3 and conc. HCl (2) conc. HNO3 and conc. H2 SO4 (3) dil. HCl and dil. HNO3 (4) conc. HCl and conc. HNO3
Last Answer : dil. HCl and dil. HNO3
Description : Aqua regia is a 1 : 3 mixture, by volume, of (1) conc. nitric acid and conc. hydrochloric acid (2) conc. hydrochloric acid and conc. nitric acid (3) conc. nitric acid and conc. sulphuric acid (4) conc. sulphuric acid and conc. nitric acid
Last Answer : conc. nitric acid and conc. hydrochloric acid
Description : One litre of a solution contains 18.9 g of `HNO_(3)` and one litre of another solution contains 3.2 g of NaOH. In what volume ratio must these solutio
Last Answer : One litre of a solution contains 18.9 g of `HNO_(3)` and one litre of another solution contains 3.2 g of NaOH. In ... B. `8:3` C. `15:4` D. `4:15`
Description : A mixture containing `As_(2)O_(3)` and `As_(2)O_(5)` required 20 mL of 0.05 N iodine solution for titration. The resulting solution is then acidified
Last Answer : A mixture containing `As_(2)O_(3)` and `As_(2)O_(5)` required 20 mL of 0.05 N iodine solution for ... +2H_(2)O " " `(Atomic weight : As = 75)
Description : What is the signal of ammonium phosphate ?
Last Answer : Ammonium phosphate signal [( NH4) 3 PO4]
Description : At Sindri in Jharkhand, the fertilizer produced is – (1) Urea (2) Ammonium Phosphate (3) Calcium Super Phosphate (4) Ammonium Sulphate
Last Answer : (1) Urea Explanation: The Sindri factory was a Urea factory. It was the first in India to produce Ammonium Sulphate (1951), Urea (1959), and Ammonium Nitrate-Sulphate, commonly called the Double ... one 1.14 million tonne Gas based Urea fertilizer Plant and 500 MW Power Plant is being contemplated.
Description : ______ the correct formula for ammonium phosphate. (1) N4H6PO4 (2) (NH4)3PO (3) (NH4)3PO4 (4) (NH4)2PO4
Last Answer : (3) (NH4)3PO4 Explanation: (NH4)3PO4 is a the chemical formula for ammonium phosphate. For more chemistry related queries log on to website world of chemicals.
Description : Which Fertilizer is Mainly Manufactured in India? A. Ammonium PhosphateB. Single Super Phosphate C. Urea D. None
Last Answer : C. Urea
Description : Which of the ‘complex fertilizer’? 1) Ammonium sulphate nitrate 2) Single superphosphate 3) Ammonium phosphate 4) Calcium ammonium nitrate
Last Answer : 3) Ammonium phosphate
Description : Which of the following fertilisers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant? (A) Ammonium sulphate (B) Ammonium nitrate (C) Ammonium phosphate (D) None of these
Last Answer : (A) Ammonium sulphate