Description : Iodobenzene can be prepared by (a) treating chlorobenzene with I2 using FeCl3 catalyst. (b) treating phenol with I2 in NaOH solution. (c) treating benzenediazonium chloride with KI (d) treating benzene with CH3I using AlCl3 catalyst
Last Answer : treating benzenediazonium chloride with KI
Description : Benzenediazonium chloride reacts with phenol to form : (a) p-chlorophenol (b) Chlorobenzene (c) p-Hydroxyazobenzene (d) DDT
Last Answer : p-Hydroxyazobenzene
Description : Benzenediazonium chloride reacts with hypophosphorus acid to form : (a) Phenol (b) Benzaldehyde (c) Aniline (d) Benzene
Last Answer : Benzene
Description : Benzenediazonium chloride reacts with warm water to give (a) Aniline (b) Phenol (c) Benzene (d) Chlorobenzene
Last Answer : Phenol
Description : Which of the following statements is correct about aniline? (a) is weak acid. (b) diazotizes to benzenediazonium chloride when treated with ice-cold nitrous acid. (c) can be nitrated with ... p-nitroaniline. (d) gives an intense green color with a suspension of bleaching powder in water
Last Answer : diazotizes to benzenediazonium chloride when treated with ice-cold nitrous acid.
Description : Aniline reacts with bromine water to form (a) Bromobenzene (b) m-Bromoaniline (c) 2,4,6-Tribromoaniline (d) o- plus p-Bromoaniline
Last Answer : 2,4,6-Tribromoaniline
Description : Phenol reacts with excess bromine water to give (a) o- plus p-Bromophenol (b) Bromobenzene (c) 2,4,6-Tribromophenol (d) m-Bromophenol
Last Answer : 2,4,6-Tribromophenol
Description : Toluene reacts with chlorine in the presence of AlCl3 to give (a) o-Chlorotoluene (b) o- plus p-Chlorotoluene (c) m-Chlorotoluene (d) o- plus m-Chlorotoluene
Last Answer : o- plus p-Chlorotoluene
Description : Which of the following reactions does not produce benzene as one of the products? (a) Treating benzenediazonium chloride with H3PO2 (b) Distilling phenol with zinc dust (c) Fusing sodium benzoate with NaOH (d) Fusing sodium benzenesulfonate with NaOH
Last Answer : Fusing sodium benzenesulfonate with NaOH
Description : Which of the following are optimum temperature conditions for making benzenediazonium chloride from aniline? (a) 0°C to 10°C (b) 20°C to 25°C (c) 30°C to 40°C (d) 45°C to 50°C
Last Answer : 0°C to 10°C
Description : Benzenediazonium chloride can be converted into benzene on treatment with:
Last Answer : Benzenediazonium chloride can be converted into benzene on treatment with: A. `H_(3)PO_(3)` B. `H_(3)PO_(4)` C. `H_(3)PO_(2)` D. `HPO_(3)`
Description : Acetophenone reacts with Br2 in the presence of FeCl3 to form : (a) m-Bromoacetophenone (b) m-Dibromobenzene (c) o- + p-Bromoacetophenone (d) p-Dibromobenzene
Last Answer : m-Bromoacetophenone
Description : Benzaldehyde reacts with methylmagnesium iodide (followed by hydrolysis) to form (a) 1-Phenylethanol (b) Acetophenone (c) 2-Phenylethanol (c) Benzophenone
Last Answer : 1-Phenylethanol
Description : Benzaldehyde reacts with a mixture of concentrated sulfuric acid and nitric acid to give (a) p-Nitrobenzaldehyde (b) o-Nitrobenzaldehyde (c) p-Nitrobenzoic acid (d) m-Nitrobenzaldehyde
Last Answer : m-Nitrobenzaldehyde
Description : Ethylmagnesium iodide reacts with formaldehyde to give a product which on acid-hydrolysis forms : (a) an aldehyde (b) a primary alcohol (c) a ketone (d) a secondary alcohol
Last Answer : a primary alcohol
Description : n-Propyl iodide reacts with sodium ethoxide to give : (a) CH3CH2OCH2CH3 (b) CH3CH2OCH2CH2CH3 (c) CH3CH2OCH3 (d) CH3OCH2CH2CH3
Last Answer : CH3CH2OCH2CH2CH3
Description : Anisole on heating with concentrated HI gives (a) Iodobenzene (b) Phenol + CH3I (c) Iodobenzene + CH3OH (d) Phenol + CH3OH
Last Answer : Phenol + CH3I
Description : `I_(2)` produced when ozone reacts with moist KI is used to convert `C_(2)H_(5)OH` to `CI_(3)CHO`. Number of moles of ozone required to convert 1 mole
Last Answer : `I_(2)` produced when ozone reacts with moist KI is used to convert `C_(2)H_(5)OH` to `CI_(3)CHO`. Number of ... CI_(3)CHO` is A. 1 B. 2 C. 4 D. 3
Description : Which halide is used in making sensitive emulsion on photographic film? (1) Sodium chloride (2) Silver bromide (3) Silver iodide (4) Silver chloride
Last Answer : (2) Silver bromide Explanation: Silver bromide, a soft, paleyellow, water insoluble salt well known for its unusual sensitivity to light. This property has allowed silver halides to become the basis of modern photographic materials.
Description : The most commonly used chemicals in the artificial rainmaking or cloud seeding are (1) Silver Iodide (AgI) (2) Sodium Chloride (NaCl) (3) Dry Ice (Frozen CO2) (4) All of the above
Last Answer : (1) Silver Iodide (AgI) Explanation: Cloud seeding, a form of intentional weather modification, is the attempt to change the amount or type of precipitation that falls from clouds, by dispersing ... common chemicals used for cloud seeding include silver iodide and dry ice (solid carbon dioxide).
Description : The chemicals most commonly used for cloud seeding or artificial rainmaking' is/are (1) Silver Iodide (2) Sodium Chloride (3) Dry ice or frozen carbon dioxide (4) (4) All the above
Last Answer : (1) Silver Iodide Explanation: Cloud seeding, a form of intentional weather modification, is the attempt to change the amount or type of precipitation that falls from clouds, by dispersing ... common chemicals used for cloud seeding include silver iodide and dry ice (solid carbon dioxide).
Description : Which of the following forms the weakest acid in aqueous solution? w) hydrogen fluoride x) hydrogen chloride y) hydrogen bromide z) hydrogen iodide
Last Answer : ANSWER: W -- HYDROGEN FLUORIDE
Description : Under similar conditions, which of the following i is the best reducing agent under similar conditions? w) fluoride ion x) chloride ion y) bromide ion z) iodide ion
Last Answer : ANSWER: Z -- IODIDE ION
Description : Which halide is used in making sensitive emulsion on photograhic film? (1) Sodium chloride (2) Silver bromide (3) Silver iodide (4) Silver chloride
Last Answer : Silver bromide
Description : The most commonly used chemicals in the artificial rainmaking or cloud seeding are (1) Silver Iodide (Ag I) (2) Sodium Chloride (NaCl) (3) Dry Ice (Frozen CO2 ) (4) All of the above
Last Answer : Silver Iodide (Ag I)
Description : The chemical(s) most commonly used for cloud seeding or ‘artificial rainmaking’ is/are (1) Silver Iodide (2) Sodium Chloride (3) Dry ice or frozen carbon dioxide (4) All the above
Last Answer : Silver Iodide
Description : Table salt gets moist during rainy season because (1) sodium chloride is hygroscopic (2) sodium chloride is deliquescent (3) sodium chloride contains some quantity of sodium iodide (4) sodium chloride contains hygroscopic impurities like magnesium chloride
Last Answer : sodium chloride contains hygroscopic impurities like magnesium chloride
Description : What is the equation for aqueous potassium iodide reacts with lead nitrate in solution forming solid lead iodide?
Last Answer : The chemical equation is:2 KI + Pb(NO3)2 = 2 KNO3 + PbI2(s)
Description : What is the chemical equation for hydrogen iodide gas reacts with bromine gas?
Last Answer : The chemical reaction is:2 HI + Br2 = 2 HBr + I2
Description : Compound `[X] C_(4)H_(11)N` reacts with p-toluence sulphonyl chloride in aqueous `NaOH` to give a solid. The compound [X] is:
Last Answer : Compound `[X] C_(4)H_(11)N` reacts with p-toluence sulphonyl chloride in aqueous `NaOH` to give a solid. ... 2)-underset(CH_(3))underset(|)(N)-CH_(3)`
Description : Catalytic activity of salivary amylase requires the presence of (A) Chloride ions (B) Bromide ions (C) Iodide ions (D) All of these
Last Answer : A
Description : Which of the following cyclotron produced radiopharmaceuticals is used for assessing regional myocardial perfusion as part of an exercise stress test? (a) Thallous chloride 201TI USP (b) Sodium iodide 123I (c) Gallium citrate 67Ga USP (d) Indium 111In pentetate (e) Cobalt 57Co cyanocobalamin
Last Answer : Ans: A
Description : Which of the following has highest solubility in ionic solvent? (a) Silver iodide (b) Silver bromide (c) Silver chloride (d) Silver fluoride
Last Answer : Ans:(d)
Description : To reduce tooth decay most toothpastes contain a – (1) Bromide (2) Fluoride (3) Iodide (4) Chloride
Last Answer : (2) Fluoride Explanation: Fluoride in toothpastes prevent tooth, decay from progressing and can even reverse, or stop, early tooth decay. It works by promoting a chemical reaction in tooth enamel ... itself into enamel weakened by acid attack, making the tooth more resistant to future acid attacks.
Description : Which of the salt in the mineral mixture or food can prevent the subject from goiter D A. Cobalt Chloride B. Sodium Chloride C. Iron Sulphate D. Potassium Iodide
Last Answer : Potassium Iodide
Description : For warm cloud seeding — chemical is use a. Silver iodide b. Sodium chloride c. Sodium iodide d. Silver chloride
Last Answer : b. Sodium chloride
Description : To reduce tooth decay most toothpastes contain a (1) Bromide (2) Fluoride (3) Iodide (4) Chloride
Last Answer : Fluoride
Description : Nitrobenzene reacts with Br2 in the presence of FeCl3 to give (a) o-chloronitrobenzene (b) o-bromonitrobenzene (c) m-chloronitrobenzene (d) m-bromonitrobenzene
Last Answer : m-bromonitrobenzene
Description : Toluene reacts with bromine in the presence of uv light to give (a) m-Bromotoluene (b) Benzyl bromide (c) o-Bromotoluene (d) Benzoyl bromide
Last Answer : Benzyl bromide
Description : Pyridine reacts with HCl to form (a) Pyridinium chloride (b) 2-Chloropyridine (c) 3-Chloropyridine (d) All of these
Last Answer : Pyridinium chloride
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 : Benzene reacts with chlorine in the presence of FeCl3 catalyst to form (a) Hexachlorobenzene (b) Chlorobenzene (c) Hexachlorocyclohexane (d) Benzyl chloride
Last Answer : Chlorobenzene
Description : Which of the following statements are false about benzene? (a) It is a planar molecule with bond angles 120°. (b) It is immiscible with water forming the lower layer. (c) It can be ... Ni catalyst. (d) It reacts with ethyl chloride in the presence of aluminium chloride to form ethylbenzene.
Last Answer : It is immiscible with water forming the lower layer
Description : 1,2-Ethanediol reacts with anhydrous zinc chloride to form (a) Ethylene (b) Acetaldehyde (c) Acetylene (d) Ethyl chloride
Last Answer : Acetaldehyde
Description : 1,2-Dichloroethane reacts with excess of NaNH2 to form (a) Vinyl chloride (b) Ethylene (c) Ethyl chloride (d) Acetylene
Last Answer : Acetylene
Description : Aniline reacts with acetic anhydride to give : (a) N-Methylaniline (b) p-Aminoacetophenone (c) Acetanilide (d) m-Aminoacetophenone
Last Answer : Acetanilide
Description : How much amount of `CuSO_(4).5H_(2)O` required for liberation of `2,55gI_(2)` when titrated with KI
Last Answer : How much amount of `CuSO_(4).5H_(2)O` required for liberation of `2,55gI_(2)` when titrated with KI A. 2.5 gm B. 4.99 gm C. 2.4 gm D. 1.2 gm
Description : Which is a mutual reduction reaction ? A) `KMnO_(4)+O_(3)` B) `H_(2)O_(2)+O_(3)` C) `Ag_(2)O+O_(3)` D) `KI+H_(2)O+O_(3)`
Last Answer : Which is a mutual reduction reaction ? A) `KMnO_(4)+O_(3)` B) `H_(2)O_(2)+O_(3)` C) `Ag_(2)O+O_(3)` D) `KI+H_(2)O+O_(3)` A. A,B B. A,C C. A,D D. B,C
Description : (i) `KI+H_(2)O+O_(3)rarrA+B+O_(2)` (A turns moist starch paper blue, B turns red litmus blue) (ii) A(dry)`+O_(3)rarrX+O_(2)` What is true about X in t
Last Answer : (i) `KI+H_(2)O+O_(3)rarrA+B+O_(2)` (A turns moist starch paper blue, B turns red litmus blue) ... )` D. Average oxidation state of iodine in X is `+5`
Description : `{:("List-I","List-II"),("A) O"_(3)+H_(2)O_(2)rarr,"1) Blue"),("B) O"_(3)+"starch KI"rarr,"2) Tailing"),("C) O"_(3)+"Hg"rarr,"3) HIO"_(3)),("D) O"_(3)
Last Answer : `{:("List-I","List-II"),("A) O"_(3)+H_(2)O_(2)rarr,"1) Blue"),("B) O"_(3)+"starch KI"rarr,"2) Tailing"),("C ... 4,3,2):}` D. `{:(A,B,C,D),(3,2,1,5):}`