Description : Which alcohol is most reactive towards `HCl` in the presence of anhydrous `ZnCl_(2)`?
Last Answer : Which alcohol is most reactive towards `HCl` in the presence of anhydrous `ZnCl_(2)`? A. primary B. secondary C. tertiary D. all of these
Description : Choose the alcohol that is most reactive with conc. `HCl//ZnCl_(2)`?
Last Answer : Choose the alcohol that is most reactive with conc. `HCl//ZnCl_(2)`? A. Methanol B. Ethanol C. 2-Propanol D. 2-methyl-2-propanol
Description : The order of reactivity of following alcohols, towards conc. HCl is :
Last Answer : The order of reactivity of following alcohols, towards conc. HCl is : A. `IgtIIgtIIIgtIV` B. `IgtIIIgtIIgtIV` C. `IVgtIIIgtIIgtI` D. `IVgtIIIgtIgtII`
Description : Assertion (A): Dehydration of alcohols can be carried out with Conc `H_(2)SO_(4)` but not with conc HCl Reason (R): `H_(2)SO_(4)` is dibasic while HCl
Last Answer : Assertion (A): Dehydration of alcohols can be carried out with Conc `H_(2)SO_(4)` but not with conc HCl ... R is false D. A is false but R is true
Description : Which of the following compounds can be used for drying of `H_(2)S` gas? I. Conc `H_(2)SO_(4)` II. `P_(4)O_(10)` III. Anhydrous `CaC1_(2)` IV. Anhydro
Last Answer : Which of the following compounds can be used for drying of `H_(2)S` gas? I. Conc `H_(2)SO_(4)` II. ` ... IV B. only I C. only II and III D. only III
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 : `underset"Conc."(HCl) + underset"Conc."(HNO_3)to` In this reaction change in oxidation number of N Is ______
Last Answer : `underset"Conc."(HCl) + underset"Conc."(HNO_3)to` In this reaction change in oxidation number of N Is ______
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 : 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 : 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 : Amongest `H_(2)O,H_(2)S,H_(2)Se` and `H_(2)Te` the one with highest boiling point is :
Last Answer : Amongest `H_(2)O,H_(2)S,H_(2)Se` and `H_(2)Te` the one with highest boiling point is : A ... H-bonding D. `H_(2)Se` because of lower molecular weight
Description : Fatty acids react with trihydric alcohols to form
Last Answer : glycerides.
Description : Aliphatic primary amines react with cold nitrous acid to form (a) Alcohols (b) Diazonium salts (c) Nitriles (d) Nitroalkanes
Last Answer : Alcohols
Description : Which of the following reagents readily react with ethyl methyl ether? (a) NaOH (b) Conc HI (c) KMnO4 (d) H2O
Last Answer : Conc HI
Description : The major end product (B) of the reaction: `overset(HCI)underset(ZnCl_(2))rarr A overset(1.NaCN("excess"))underset(2.H_(2),Ni)rarr B`
Last Answer : The major end product (B) of the reaction: `overset(HCI)underset(ZnCl_(2))rarr A overset(1.NaCN("excess"))underset(2.H_(2),Ni)rarr B` A. B. C. D.
Description : Ethylene glycol when heated in the presence of an hydrous `ZnCl_(2)` yields
Last Answer : Ethylene glycol when heated in the presence of an hydrous `ZnCl_(2)` yields A. Ethanal B. Ethylene oxide C. Dioxane D. Diethylene glycol
Description : Predict which of the following alkenes reacts the fastest with HCl? (a) CH3CH2CH2CH2CH=CH2 (b) cis-CH3CH2CH=CHCH2CH3 (c) trans-CH3CH2CH=CHCH2CH3 (d) (CH3)2C=CHCH2CH3
Last Answer : (CH3)2C=CHCH2CH3
Description : Which of the following hydrogen halides react with `AgNO_3` to give a precipitate that dissolves in hypo solution ? (I)HCl (II)HF (III)HI (IV)HBr
Last Answer : Which of the following hydrogen halides react with `AgNO_3` to give a precipitate that dissolves in hypo solution ? (I) ... II),(I) D. (II),(IV),(III)
Description : A certain weioght of pure `CaCO_(3)` is made to react completely with 200mL of a HCl solution to given 227mL of `CO_(2)` gas at STP. The notmality of
Last Answer : A certain weioght of pure `CaCO_(3)` is made to react completely with 200mL of a HCl solution to ... at STP. The notmality of the HCl` solution is :
Description : Chlorine free radicals react with methane by : (a) donating their free-radical electron to methane to form chloromethane. (b) abstracting a hydrogen atom from methane, and producing ... produce chloromethane. (d) forming a carbonium ion intermediate that rapidly dissociates to form chloromethane
Last Answer : abstracting a hydrogen atom from methane, and producing HCl and a methyl radical
Description : Which of the following compounds will react fastest with Lucas reagent? (a) 1-propanol (b) 2-methyl-1-propanol (c) 2-propanol (d) 2-methyl-2-propanol
Last Answer : 2-methyl-2-propanol
Description : One moles of anhydrous `AB` dissolves in water and liberates `21.0 J mol^(-1)` of heat. The valueof `DeltaH^(Theta)` (hydration) of `AB` is `-29.4 J m
Last Answer : One moles of anhydrous `AB` dissolves in water and liberates `21.0 J mol^(-1)` of heat. The valueof `DeltaH^(Theta) ... mol^(-1)` D. `-8.4 J mol^(-1)`
Description : The heat of solution of anhydrous `CuSO_(4)` and `CuSO_(4).5H_(2)O` are -15.89 and 2.80 Kcal `mol^(-1)` respectively. What will be the heat of hydrati
Last Answer : The heat of solution of anhydrous `CuSO_(4)` and `CuSO_(4).5H_(2)O` are -15.89 and 2.80 Kcal `mol^(-1) ... `18.69` Kcal C. `-28.96` Kcal D. 28.96 Kcal
Description : `PH_(3) ("anhydrous") + HBr ("anhydrous") rarr X`. Identify X ?
Last Answer : `PH_(3) ("anhydrous") + HBr ("anhydrous") rarr X`. Identify X ? A. `H_(3)BrO_(3)` B. `PH_(4)Br` C. `Br_(2)` D. `P_(4)`
Description : In which following statement are correct. (a) Anhydrous hydrogen fluroide is a liquid at ordianry temperature while other halogen acid are gases. (b)
Last Answer : In which following statement are correct. (a) Anhydrous hydrogen fluroide is a liquid at ordianry temperature while other ... (B) b C. (C) c D. d
Description : Which of the following structures correspond to the product expected, when excess of `C_(6)H_(6)` reacts with `CH_(2)Cl_(2)` in presence of anhydrous
Last Answer : Which of the following structures correspond to the product expected, when excess of `C_(6)H_(6)` reacts with ` ... anhydrous `AlCl_(3)`? A. B. C. D.
Description : `HBr` reacts with `CH_(2)=CH-OCH_(3)` under anhydrous conditions at room temperature to give:
Last Answer : `HBr` reacts with `CH_(2)=CH-OCH_(3)` under anhydrous conditions at room temperature to give: A. `H_(3)C-CHBr- ... (3)OH` D. `BrCH_(2)-CH_(2)-OCH_(3)`
Description : Ethyl alcohol forms X `CaCl_(2)^(3). C_(2)H_(5)OH` when `C_(2)H_(5)OH` reacts with respective anhydrous salts. Then
Last Answer : Ethyl alcohol forms X `CaCl_(2)^(3). C_(2)H_(5)OH` when `C_(2)H_(5)OH` reacts with respective anhydrous salts. Then ... = 4` D. `X = 4, Y = 4, Z = 4`
Description : The process of converting hydrated Alumina into anhydrous Alumina is called
Last Answer : The process of converting hydrated Alumina into anhydrous Alumina is called A. Roasting B. Smelting C. Dressing D. Calcination
Last Answer : The process of converting hydrated Alumina into anhydrous Alumina is called A. roasting B. smelting C. dressing D. calcination
Description : `XeF_(6)` dissolves in anhydrous `HF` to give a good conducting solution which contains:
Last Answer : `XeF_(6)` dissolves in anhydrous `HF` to give a good conducting solution which contains: A. `H^(+)` and ` ... +)` and `F^(-)` ions D. none of these
Description : How do you calculate purity on anhydrous basis?
Last Answer : What is the answer ?
Description : Proteins are soluble in (A) Anhydrous acetone(B) Aqueous alcohol (C) Anhydrous alcohol (D) Benzene
Last Answer : Answer : B
Description : Methanol cannot be dried with anhydrous CaCl2 because - (1) CaCl2 dissolves in it (2) it is not good dehydrating agent (3) it forms a solid CaCl2 × 4CH3OH (4) it reacts with CH3OH
Last Answer : (3) it forms a solid CaCl2 × 4CH3OH
Description : Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C? (A) Silicone rubber, teflon, porcelain and wood (B) Nickel, monel, stainless steel and graphite (C) Aluminium, copper, high silicon iron (D) Brass, cast iron, mild steel and tin
Last Answer : (D) Brass, cast iron, mild steel and tin
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 : Tin vessels are corroded by (A) Anhydrous ammonia (B) Aromatic solvents (C) Synthetic detergent solution (D) None of these
Last Answer : (D) None of these
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 : In laboratory preparation of H2O2 from hydrated barium peroxide with sulphuric acid , anhydrous barium peroxide is not used Why ?
Last Answer : Ans-Because it forms a protective layer of barium sulphate over anhydrous barium peroxide
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 : Copper sulphate crystals when heated strongly, lose their water of crystallization to give anhydrous copper sulphate accompanied by a change in color from: (a). Blue to green (b). Blue to white (c). Blue to sky blue (d). Blue to grey
Last Answer : (b). Blue to white
Description : Anhydrous ammonia have equivalent acidity a. 93 b. 110 c. 128 d. 148
Last Answer : d. 148
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 : Raw materials for nitric acid manufacture are (A) Hydrogen peroxide, air and water (B) Anhydrous ammonia and air (C) Anhydrous ammonia, air and water (D) Wet ammonia, air and water
Last Answer : (C) Anhydrous ammonia, air and water
Description : Benzene reacts with benzoyl chloride in the presence of anhydrous aluminium chloride to form (a) Benzyl chloride (b) Benzaldehyde (c) Benzal chloride (d) Benzophenone
Last Answer : Benzophenone
Description : 1,2-Ethanediol reacts with anhydrous zinc chloride to form (a) Ethylene (b) Acetaldehyde (c) Acetylene (d) Ethyl chloride
Last Answer : Acetaldehyde
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