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 : The beet molasses is pretreated with __________ to reduce great quantity of trace metals. A.ferrocyanide or ferricyanide B.ethylenediamine tetrachloro acetic acid C.hydrochloric acid D.sulphuric acid
Last Answer : A.ferrocyanide or ferricyanide
Description : A student dropped few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was then passed through lime water. What change would be observed in lime water? Write balanced chemical equation for both the change observed?
Last Answer : Answer. When dilute HCl is added to marble which is calcium carbonate, it forms calcium chloride, water and carbon dioxide. The chemical equation for the reaction is as follows: CaCO3 + 2HCl → CaCl2 + H2O ... reaction between lime water and carbon dioxide is as follows: Ca(OH)2 + CO2 → CaCO3 + H2O
Description : What are the chemical signals of potassium ferrocyanide ?
Last Answer : : Chemical Signal of Potassium Ferrocyanide K4 [Fe (CN6)]
Description : Coke oven gas is stripped of its H2S and mercaptans content by (A) Absorption in wash oil (B) Adsorption on bog iron bed (C) Bubbling it through dilute sulphuric acid (D) Adsorption on silica gel
Last Answer : (B) Adsorption on bog iron bed
Description : ________ does not react with dilute hydrochloric acid but reacts with sulphuric acid and does not liberate hydrogen gas. a) iron b)copper c)gold d)zinc
Last Answer : b)copper
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 : Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and ... (c). X- Sulphuric acid and Y- Hydrogen gas (d). X- Hydrochloric acid and Y- Hydrogen gas
Last Answer : (c). X- Sulphuric acid and Y- Hydrogen gas
Description : . A dilute aqueous solution is to be concentrated in an evaporator system. High pressure steam is available. Multiple effect evaporator system is employed, because (A) Total heat transfer area of ... in a single effect is much lower than that in any effect in a multi-effect system
Last Answer : (B) Total amount of vapor produced per Kg of feed steam in a multiple effect system is much higher than in a single effect
Description : Write balanced chemical equations for the following reactions: (a) Dilute sulphuric acid reacts with aluminium powder. (b) Dilute hydrochloric acid reacts with sodium carbonate. (c) Carbon dioxide is passed through lime water. -Chemistry
Last Answer : i hope it helped you
Description : How do you prepare dilute sulphuric acid?
Last Answer : 20 ml 2 normal dilute sulphuric acid means?
Description : Dilute sulphuric acid is transported in __________ pipes. (A) Mild steel (B) Lead (C) Copper (D) Special alloys
Last Answer : (B) Lead
Description : What do you observe when (a) dilute sulphuric acid is added to granulated zinc?
Last Answer : Zinc reacts with dilute sulphuric acid to produce effervescence and hydrogen gas is evolved.
Description : Which of the following acid is also known as vinegar? (a) Dilute hydrochloric acid (b) Dilute sulphuric acid (c) Dilute acetic acid (d) Dilute tartaric acid
Last Answer : (c) Dilute acetic acid
Description : Reaction of dilute sulphuric acid with phosphate rock produces (A) Phosphoric acid (B) Superphosphate (C) Triple superphosphate (D) Gypsum
Last Answer : (A) Phosphoric acid
Description : When a lead storage battery is discharged - (1) SO2 is evolved (2) Lead sulphate is consumed (3) Lead is formed (4) Sulphuric acid is consumed
Last Answer : (4) Sulphuric acid is consumed Explanation: Lead storage battery was invented by French physicist Gaston Plante in 1859. In the discharged state both the positive and negative plates become lead sulphate and the electrolyte loses much of its dissolved sulphuric acid and becomes primarily water.
Description : When a lead storage battery is discharged, (1) SO2 is evolved (2) Lead sulphate is consumed (3) Lead is formed (4) Sulphuric acid is consumed
Last Answer : Sulphuric acid is consumed
Description : The reaction of zinc with dilute and concentrated nitric acid, respectively, produce
Last Answer : The reaction of zinc with dilute and concentrated nitric acid, respectively, produce A. `NO_(2) and NO` B. `NO and ... N_(2)O` D. `N_(2)O and NO_(2)`
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 : 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 : 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 : The reactions of `CI_(2)` gas with cold-dilute and hot-concentrated NaOH in water give sodium salts of two different oxioacids of chlorine, P and Q, r
Last Answer : The reactions of `CI_(2)` gas with cold-dilute and hot-concentrated NaOH in water give sodium salts of ... `H_3PO_2` D. `SOCl_2 , PCl_5` and `H_3PO_5`
Last Answer : The reactions of `CI_(2)` gas with cold-dilute and hot-concentrated NaOH in water give ... porchloric acids D. (D) chloric and hypochlorus acids
Description : Concentrated sulphuric acid is always diluted by adding which thing? -Do You Know?
Last Answer : answer:
Description : Phenol when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid gives:
Last Answer : Phenol when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid gives ... C. nitrobenzene D. 2,4,6-rinitrobenzene
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 : Concentrated sulphuric acid acts as
Last Answer : Concentrated sulphuric acid acts as A. dehydrating agent B. sulphonating agent C. reducing agent D. oxidising agent
Description : concentrated sulphuric acid on reaction with NaCl, NaBr and Nal produces HCl, bromine and iodine respectively. What order of oxidising ability of halo
Last Answer : concentrated sulphuric acid on reaction with NaCl, NaBr and Nal produces HCl, bromine and iodine respectively. What ... gt l_(2) gt H_(2)SO_(4)`
Description : Concentrated sulphuric acid connot be used to prepare HBr or HI from KBr of KI because it
Last Answer : Concentrated sulphuric acid connot be used to prepare HBr or HI from KBr of KI because it A. reacts too slowly ... to `KBrO_(3)` or KI to `KIO_(3)`
Description : Concentrated sulphuric acid is not
Last Answer : Concentrated sulphuric acid is not A. efflorescent B. hygroscopic C. oxidising agent D. sulphonating agent
Description : What observations are made in reaction of hexane with concentrated sulphuric acid?
Last Answer : Any chemical reaction occur.
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 : 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 : 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 : Raschig ring made of porcelain cannot be used for treating concentrated (A) Hydrochloric acid (B) Nitric acid (C) Alkalis (D) Sulphuric acid
Last Answer : (C) Alkalis
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 : Concentrated sulphuric acid is always diluted by adding which thing?
Last Answer : Acid to water
Description : In lead acid accumulators, the container is filled with distilled water and concentrated sulphuric acid in the ratio of a. 1 : 2 b. 2 : 1 c. 3 : 1 d. 1 : 3
Last Answer : c. 3 : 1
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 : 1.60 g of a metal A and 0.96 g of a metal B when treated with excess of dilute acid, separately, produced the same amount of hydrogen. Calculate the e
Last Answer : 1.60 g of a metal A and 0.96 g of a metal B when treated with excess of dilute acid, separately, ... weight of A if the equivalent weight of B is 12.
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 : Hello, please there is no well-founded chemist who would know what would be created by mixing these substances, in approximately the given ratio: toluene 70%, ethanol 20%, gasoline 9.5% and potassium salt of ... its properties. Please advise how to dissolve it - and release it ... Thanks, Alfi.
Last Answer : go to the store, buy it all and try it .. then write how you ended up
Description : In flue gas analysis by Orsat's apparatus, carbon dioxide is absorbed by (A) Potassium hydroxide (B) Dilute potassium carbonate (C) Cuprous chloride (D) Alkaline pyrogallol solution
Last Answer : (A) Potassium hydroxide
Description : A 'breath test' used by traffic police to check drunken driving uses: (1) potassium dichromate-sulphuric acid (2) potassium permanganate-sulphuric acid (3) turmeric on filter paper (4) silica gel coated with silver nitrate
Last Answer : (1) potassium dichromatesulphuric acid Explanation: The main constituent of alcohol is Ethanol and the concentration of ethanol in a sample can be determined by back titration with acidified potassium ... contact with the yellow dichromate-coated crystals, the color changes from yellow to green.
Description : To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of A. Hydrochloric acid B. Sulphuric acid C. Nitric acid D. Citric acid
Last Answer : ANS: B
Description : The presence of free ammonia in sewage, is detected by A. Boiling B. Adding potassium permanganate C. Adding sulphuric acid D. Phenol-di-sulphuric acid
Last Answer : ANS: A