Description : Out of (a) 1 M CaCl2 (b) 1 M AlCl3 which aqueous soln. will show max. vapour pressure at 300 K ?
Last Answer : (a) 1 M CaCl3 , if we assume 100% dissociation, i for CaCl2 = 3 and AlCl3 = 4 and relative lowering of V. P. is directly proportional to i.
Description : Out of (a) 0.01 M KNO3 , (b) 0.01 M Na2 SO4 which aqueous soln. will exhibit high B. P.?
Last Answer : (a) 0.01 M Na2 SO4
Description : Compound A(`C_7H_8O`)is insoluble in water, dilute HCl & aqueous `NaHCO_3`, it dissolves in dilute NaOH.When A is treatedwith `Br_2` water it is conve
Last Answer : Compound A(`C_7H_8O`)is insoluble in water, dilute HCl & aqueous `NaHCO_3`, it dissolves in dilute NaOH.When A ... . The structure ofA is A. B. C. D.
Description : When black copper oxide placed in a beaker is treated with dilute HCl, its colour changes to......... a) Whiteb) Red c) Blue-green d) No change
Last Answer : c) Blue-green
Description : Ethyl acetoacetate undergoes acid-hydrolysis with dilute HCl to form (a) Acetoacetic acid (b) Succinic acid (c) Acetic acid (d) Adipic acid
Last Answer : Acetoacetic acid
Description : Which of the following compounds does not form a salt with dilute HCl? (a) CH3CH2CONH2 (b) (CH3CH2)2NH (c) CH3CH2NH2 (d) (CH3CH2)3N
Last Answer : CH3CH2CONH2
Description : Baeyer's reagent is (a) dilute KMnO4 (b) HCl + ZnCl2 (c) Br2 in CCl4 (d) NH2NH2
Last Answer : dilute KMnO4
Description : During the electrolysis of a dilute aqueous solution of sulfuric acid, what happens to the sulfuric acid concentration?
Last Answer : ANSWER: IT REMAINS THE SAME
Description : The theory of interionic attraction attributed to Debye and Hückel: w) was disproved by Arrhenius x) accounts quantitatively for the attraction between ions in dilute aqueous solutions y) does not account for kindered "ion-activity" z) accounts for intra-molecular polar bonds
Last Answer : ANSWER: X -- ACCOUNTS QUANTITATIVELY FOR THE ATTRACTION BETWEEN IONS IN DILUTE AQUEOUS SOLUTIONS
Description : Out of (a) 200 ml of 2 M NaCl Soln. and (b) 200 ml of 1 M glucose Soln. which one has higher osmotic pressure?
Last Answer : (a) 200 ml of 2 M NaCl Soln. NaCl is an electrolyte which dissolve to give ions. Glucose and urea are non electrolytes. Thus glucose has minimum conc. and hence minimum osmotic pressure.
Description : Explain why anhydrous HCl is a bad conductor electricity while aqueous HCl is a good conductor of electricity.
Last Answer : Ans: Hcl is a covalent compound and has no ion but when dissolve into solution it under go dissociation and produce ions in the solution and hence conduct electricity.
Description : A compound undergoes reduction with LiAlH4. It also dissolves in aqueous NaOH from which it can be recovered by addition of HCl. The compound is (a) a carboxylic acid (b) an ester (c) an acid anhydride (d) an alcohol
Last Answer : a carboxylic acid
Description : What is the pH of an aqueous solution of 0.1 molar HCl? w) 7 x) 13 y) 1 z) 3
Last Answer : ANSWER: Y -- 1
Description : Ion which is not present in dilute HCl.
Last Answer : Ion which is not present in dilute HCl. A. `H^(+)` B. `H_(3)O^(+)` C. `Cl^(-)` D. `HCl`
Description : Compound `A,C_(7)H_(8)O`, is insoluble in water, dilute `HCl`, and aquenous `NaHCO_(3)`, it dissolves in dilute `NaOH`. When `A` is treated with bromi
Last Answer : Compound `A,C_(7)H_(8)O`, is insoluble in water, dilute `HCl`, and aquenous `NaHCO_(3)`, it ... . o-cresol B. m-cresol C. p-cresol D. anisole
Description : An unknown substance (P) functions as weak base in water. It produces silver mirror test. It reacts with dilute `HCl` to produce (Q) which turns blue
Last Answer : An unknown substance (P) functions as weak base in water. It produces silver mirror test. It reacts with dilute `HCl` ... ` C. `NH_(2)OH` D. `HPO_(3)`
Description : A salt solution of `Cd^(2+)` in dilute HCl, on treatment with a solution of `BaCl_(2)` gives a white precipitate, which is insoluble in concentrated `
Last Answer : A salt solution of `Cd^(2+)` in dilute HCl, on treatment with a solution of `BaCl_(2)` gives a white precipitate, ... C. `NO_(2)^(-)` D. `S^(2-)`
Description : Componds `(A)` and `B` are treated with dilute `HCl` separately. The gases liberated are `Y` and `Z` respectively. `Y` turns acidified `K_2 Cr_2 O_7`
Last Answer : Componds `(A)` and `B` are treated with dilute `HCl` separately. The gases liberated are `Y` and `Z` ... )SO_(4)` D. `NaC1 and Na_(2)CO_(3)`
Description : A crystalline solid X reacts with dilute HCl to liberate a gas Y. The gas Y decolourises acidified `KMnO_(4)`. When a gas Z is slowly passed into aque
Last Answer : A crystalline solid X reacts with dilute HCl to liberate a gas Y. The gas Y decolourises acidified `KMnO_(4)`. When ... 2)S` D. `Na_(2)SO_(4),SO_(2)`
Description : The metal that does not give H2 on treatment with dilute HCl is (a) Zn (b) Fe (c) Ag (d) Ca
Last Answer : Ans:(c)
Description : he metal does not give H2 on treatment with dilute HCL is?
Last Answer : :Ag
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 : 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
Last Answer : (B) Acetic acid
Description : Ammonia present in the coke oven gas is removed by washing with (A) Caustic solution (B) Dilute ammoniacal liquor (C) Dilute HCl (D) Ethanolamine
Last Answer : (B) Dilute ammoniacal liquor
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 : If a dilute solution of aqueous `NH_(3)` is saturated with `H_(2)S` then the product formed is :
Last Answer : If a dilute solution of aqueous `NH_(3)` is saturated with `H_(2)S` then the product formed is : A. `(NH_(4))_( ... (NH_(4))_(2)S_(x)` D. `NH_(4)OH+S`
Description : Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the presence of
Last Answer : Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the presence of ... B. Oxgen C. `CO_(2)` D. Argin
Last Answer : Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the ... nitrogen B. oxygen C. carbon dioxide D. argon
Last Answer : Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the ... Nitrogen B. Oxygen C. Carbon dioxide D. Argon
Description : A white solid reacts with dilute HCI to give colourless gas that de-colourises aqueous bromine. The solid is likely to be.
Last Answer : A white solid reacts with dilute HCI to give colourless gas that de-colourises aqueous bromine. ... chloride C. Sodium acetate D. Sodium thiosulphate
Description : An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are ... (D) More number of trays are required and the residue composition is more dilute in methano
Last Answer : (A) Less number of trays are required
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 : A process stream of dilute aqueous solution flowing at the rate of10 Kg.s -1 is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s -1 . A 1 ... side (C) Parallel flow with process stream on shell side (D) Parallel flow with process stream on tube side
Last Answer : (A) Counter flow with process stream on shell side
Description : When dilute aqueous solutions of two salts are mixed, the process is associated with (A) Decrease in temperature (B) Increase in temperature (C) No change in temperature (D) Change in temperature which is a function of composition
Last Answer : B) Increase in temperature
Description : Why is aniline soluble in aqueous HCl?
Last Answer : Why is aniline soluble in aqueous HCl?
Description : `CH_(3)CH_(2)CH_(2)CONH_(2)` is boiled with aqueous NaOH, then the reaction mixture is acidified with HCl. The products obtained are
Last Answer : `CH_(3)CH_(2)CH_(2)CONH_(2)` is boiled with aqueous NaOH, then the reaction mixture is acidified with HCl. The ... CH_(3)CH_(2)CH_(2)COO^(-)+NH_(4)Cl`
Description : Beryllium oxide is treated separately with aqueous HCl and aqueous NaOH solutions.
Last Answer : Write balanced chemical equations : Beryllium oxide is treated separately with aqueous HCl and aqueous NaOH solutions.
Description : What happens when a coin is placed in dilute acid?
Last Answer : Need answer
Description : Mgco3 + hcl = What will happen ?
Last Answer : MgCO₃ + HCl → MgCl₂ + CO₂ + H₂O
Description : What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor? (a) In the absence of HCl secretion, inactive pepsinogen is not converted into the active ... c) Gastric juice will be deficient in chymosin. (d) Gastric juice will be deficient in pepsinogen.
Last Answer : (a) In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin.
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 : 10.(a) An ore on treatment with dilute hydrochloric acid produces brisk effervesces. What type of ore is this? What steps will be required to obtain metal from the enriched ore. , (b) ... in coin and colour of the solution ? Write balanced chemical equation of the reaction involved. -Chemistry
Last Answer : (a) Carbonate ore: (i) Calcination: Carbonate ore is heated in limited supply of air and oxide is obtained, e.g. (b) Copper, being more reactive than silver will displace silver from silver nitrate ... and there will be deposition of silver on copper coin. The colour of solution will turn to blue.
Description : Ethanol containing 5% water is known as – (1) Dilute alcohol (2) Power alcohol (3) Rectified spirit (4) Absolute alcohol
Last Answer : (3) Rectified spirit Explanation: A rectified alcohol is highly concentrated ethanol which' has been purified by means of repeated distillation, a process that is called rectification. It typically contains 95% alcohol by volume and 5% water. Normally, ethanol with 5% water is known as pure alcohol.
Description : Which among the following is used to dilute oxygen in the gas cylinders used by divers? (1) Krypton (2) Argon (3) Helium (4) Neon
Last Answer : (3) Helium Explanation: Helium is used to dilute the oxygen and nitrogen to reduce these affects. Helium is the gas of choice to use because it is an inert gas, is thinner, therefore more compressible than air, and its narcotic properties are negligible in comparison to nitrogen.
Description : The gas used to dilute oxygen for breathing by deep sea divers is- (1) Neon (2) Argon (3) Nitrogen (4) Helium
Last Answer : (4) Helium Explanation: Helium is used since it has very low (almost non-existent) narcotic properties. The nitrogen in air is highly narcotic at depth and adding helium allows one to dive without the effects of narcosis (where one's mind is impaired).
Description : Hard water and soft water can be distinguished by using – (1) dilute acid (2) ordinary soap (3) detergent (4) liquid soap
Last Answer : (3) detergent
Description : What happens when freshly precipitated Fe (OH)3 is shaken with a little amount of dilute solution of FeCl3 ?
Last Answer : Ans. It causes peptization leading to the formation of a positively charged sol of Fe (OH)3