[{"id":253390,"question":"<div>To prepare ethane by Wurtz synthesis the suitable alkyl halide is</div>","choices":[{"text":"Ethyl iodide","value":"A"},{"text":"any alkyl iodide","value":"B"},{"text":"Ethyl chloride","value":"C"},{"text":"Methyl bromide","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253389,"question":"<sup>Reaction of ethyl bromide with ammonia</sup>","choices":[{"text":"<div>Completes in a single step</div><div><br></div>","value":"A"},{"text":"Completes in two steps","value":"B"},{"text":"Continues till N is left with no lone pair","value":"C"},{"text":"is reversible","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253388,"question":"In beta elimination reaction","choices":[{"text":"carbon number changes","value":"A"},{"text":"unsaturated compound is formed","value":"B"},{"text":"hybridization. ofC remains same","value":"C"},{"text":"pi bonds are decreased","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253387,"question":"Which is an intermediate in SN1 reaction","choices":[{"text":"Ethoxide ion","value":"A"},{"text":"Carbocation","value":"B"},{"text":"alkyl halide","value":"C"},{"text":"alkene","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253386,"question":"The reagent for alkaline hydrolysis of ethyl bromide to form ethyl alcohol is","choices":[{"text":"water at room T","value":"A"},{"text":"Alcoholic KOH+heat","value":"B"},{"text":"Ethanol + heat","value":"C"},{"text":"dil. NaOH+ heat","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253385,"question":"Which pair gives same dehydrohalogenation product","choices":[{"text":"<div>I-Chlorobutane, 2-Chlorobutane</div><div><br></div>","value":"A"},{"text":"I-Chloropropane, 2-Chloropropane","value":"B"},{"text":"I-Bromopentane. 3-Bromopentane","value":"C"},{"text":"iso-butvl chloride. 2°- butyl chloride","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253384,"question":"In an elimination reaction a more substituted alkene is formed due to the stability associated with","choices":[{"text":"Free radical","value":"A"},{"text":"transition state","value":"B"},{"text":"Activated complex","value":"C"},{"text":"Carbocation","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253383,"question":"Dehydrohalogenation of secondary butyI bromide will give","choices":[{"text":"Propene","value":"A"},{"text":"1-Butene","value":"B"},{"text":"Butene","value":"C"},{"text":"2-Butene","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253382,"question":"Which of the following reactants will be required to form ethene from ethyl chloride","choices":[{"text":"<sub>Alcoholic KOH</sub>","value":"A"},{"text":"Alkaline KMnO4","value":"B"},{"text":"Aqucous KOH","value":"C"},{"text":"Aqucous NaOH","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253381,"question":"Which one among the following is not a good leaving group","choices":[{"text":"HSO4-","value":"A"},{"text":"CI-","value":"B"},{"text":"OH-","value":"C"},{"text":"Br-","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253380,"question":"In nucleophilie substitution bimolecular reaction the order of reaction with respect to substrate","choices":[{"text":"2 order","value":"A"},{"text":"3 order","value":"B"},{"text":"1st order","value":"C"},{"text":"Zero order","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253379,"question":"Which compound is obtained hy the elimination reaction on bromoethane?","choices":[{"text":"Butene","value":"A"},{"text":"Ethene","value":"B"},{"text":"Propene","value":"C"},{"text":"Propane","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253378,"question":"When 2-bromobutane reacts with alcoholic KOH, the reaction is called","choices":[{"text":"Chlorination","value":"A"},{"text":"Halogenation","value":"B"},{"text":"Dehydrohalogenation","value":"C"},{"text":"Hydrogenation","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253377,"question":"Which of the following alkyl halides undergoes SN1 reaction fastest","choices":[{"text":"Methyl chloride","value":"A"},{"text":"Isobutyl chlorido","value":"B"},{"text":"Ethy l chloride","value":"C"},{"text":"Tertiary butyl chloride","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253376,"question":"A mixture of 1-chloropropane and 2-chloro-propane when treated with alcoholic KOH, gives","choices":[{"text":"Prop-2-ene","value":"A"},{"text":"Isopropy lene","value":"B"},{"text":"Propene","value":"C"},{"text":"A mixture of prop-l-ene","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253375,"question":"In elimination reaction i.e, in the formation of alkene, the reactivity of alkyl halide is in the order:","choices":[{"text":"CI&gt;Br&gt;I","value":"A"},{"text":"I&gt;Br&gt;Cl","value":"B"},{"text":"Br&gt;CI&gt;I","value":"C"},{"text":"I&gt;CI&gt; Br","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253374,"question":"The species which are produced by heterolytic bond breaking and can act as electron pair donor","choices":[{"text":"Free radicals","value":"A"},{"text":"Cations","value":"B"},{"text":"Nucleophiles","value":"C"},{"text":"electrophile","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253373,"question":"Among the following, which one is nucleophile","choices":[{"text":"H+","value":"A"},{"text":"Ca2+","value":"B"},{"text":"OH-","value":"C"},{"text":"Na+","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253372,"question":"Which is an intermediate in Svl","choices":[{"text":"Ethoxide ion","value":"A"},{"text":"Alkene","value":"B"},{"text":"Alkyl halide","value":"C"},{"text":"Carbocation","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253371,"question":"Which one of the following is NOT a nucleophile","choices":[{"text":"NH2+","value":"A"},{"text":"BF3","value":"B"},{"text":"H2O","value":"C"},{"text":"CH3-","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253370,"question":"The order of reactivitv of alksI halides towards nucleophile is","choices":[{"text":"RI&gt;RBr RF&gt;RCI","value":"A"},{"text":"RF&gt;RCI&gt;RBr&gt;RI","value":"B"},{"text":"RI&gt;RBr&gt; RCI&gt;RE","value":"C"},{"text":"RF&gt;RBr&gt;RCI&gt;RI","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253369,"question":"<div>The alkaline hydrolysis of bromoethane shown below gives alcohol as the product: H3C-CH2-Br-------H3C-CH2-OH</div><div>The reagent and the condition used in this reaction may be:</div>","choices":[{"text":"H20 at room temperature","value":"A"},{"text":"KOH in alcohol","value":"B"},{"text":"Ethanol. heat","value":"C"},{"text":"Dilute NaOH(aq) warm","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253368,"question":"When purely alcoholic solution of sodium/potassiumhydroxide and halogenoalkanes are reacted an alkene is formed, what is the mechanism of reaction?","choices":[{"text":"Elimination","value":"A"},{"text":"Debromination","value":"B"},{"text":"Dehydration","value":"C"},{"text":"Reduction","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253367,"question":"Correct order for the reactivity ofalkyl halide in S, reactions","choices":[{"text":"R-I&gt;R-F&gt;R-CI","value":"A"},{"text":"R-F&gt;R-CI&gt;R-I","value":"B"},{"text":"R-I&gt;R-CI&gt;R-F","value":"C"},{"text":"R-CI&gt;R-I&gt;R-F","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253366,"question":"Correct statement about Nucleophilic substitution bimolecular is","choices":[{"text":"Transition state is formed","value":"A"},{"text":"Inversion take place","value":"B"},{"text":"It is two step reacticn","value":"C"},{"text":"Both a &amp;c","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253365,"question":"The reaction C2H5CI + aqueous KOH---------C2H5OH+ KCI is","choices":[{"text":"Electrophilic addition","value":"A"},{"text":"Nucleophilic addition","value":"B"},{"text":"Electrophilic substitution","value":"C"},{"text":"Nucleophilic substitution","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253364,"question":"An alkyl halide reacts with NH3 to give","choices":[{"text":"Amide","value":"A"},{"text":"Cyanide","value":"B"},{"text":"Amine","value":"C"},{"text":"Aniline","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253363,"question":"Out of monochloro, monobromo and mongiodo derivatives of ethane, the mos reactive compound towards nucleophilic substitution will be","choices":[{"text":"C2H5Br","value":"A"},{"text":"C2H5Cl","value":"B"},{"text":"C2H5I","value":"C"},{"text":"All are equally reactive","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253362,"question":"Elimination unimolecular reactions involve","choices":[{"text":"Second order kinetics","value":"A"},{"text":"First order kinetics","value":"B"},{"text":"Third order kinetics","value":"C"},{"text":"Zero order kinetics","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253361,"question":"Which of the following is primary alkyl halide","choices":[{"text":"IsopropyI halide","value":"A"},{"text":"Sec-butyl halide","value":"B"},{"text":"Tert-buryi halide","value":"C"},{"text":"Neo-pentyl halide","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253360,"question":"Which isomer of C4H9Br will produce 2-methyl propane-2-ol on treatment with aqueous KOH","choices":[{"text":"n-butyI bromide","value":"A"},{"text":"Sec-butyI bromide","value":"B"},{"text":"Isobutyl halide","value":"C"},{"text":"Tertiary butyl chloride","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253359,"question":"Which one of the following is not associated with SN2 mechanism","choices":[{"text":"100 % inversion of configuration","value":"A"},{"text":"Tertiar alkyI halides","value":"B"},{"text":"2nd order kinetics","value":"C"},{"text":"Change of hy bridization from sp³ to sp² in transition state","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253358,"question":"Which of the following factors does not affect the SN1 rate is","choices":[{"text":"Nucleophilicity of the attacking nucleophile","value":"A"},{"text":"Stability of the carbonium ion","value":"B"},{"text":"Solvent system","value":"C"},{"text":"The nature of leaving group","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253357,"question":"In the transition state of S2 mechanism reaction with alkyl halides, which of the following orbital hybridization is involved","choices":[{"text":"sp³","value":"A"},{"text":"sp","value":"B"},{"text":"sp²","value":"C"},{"text":"dsp³","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253356,"question":"Which of the following decides the reactivity of alkyl halides?","choices":[{"text":"C-C bond strength","value":"A"},{"text":"C-H bond strength","value":"B"},{"text":"C-X bond strength","value":"C"},{"text":"Electronegativity difference","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253355,"question":"Chloroform (CHCl3) is?","choices":[{"text":"Primary alkyl halide","value":"A"},{"text":"Secondary alkyl halide","value":"B"},{"text":"Tertiary alkyl halide","value":"C"},{"text":"a liquid","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253354,"question":"Which is a good nucleophile as well as a good leaving group?","choices":[{"text":"F-","value":"A"},{"text":"Cl-","value":"B"},{"text":"Br-","value":"C"},{"text":"I-","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253353,"question":"An amine is produced in the following reaction<br>C2H5l+2NH3-------C2H5NH2 +NH4l. What is mechanism?","choices":[{"text":"Electrophilic addition","value":"A"},{"text":"Electrophilic substitution","value":"B"},{"text":"Nucleophilic addition","value":"C"},{"text":"Nucleophilic substitution","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253352,"question":"The Sl mechanism for the hydrolysis of an alkyl halide to an alcohol involves the formation of","choices":[{"text":"Carbocation","value":"A"},{"text":"Carbanion","value":"B"},{"text":"Pentavalent carbon in the transition state","value":"C"},{"text":"Free radical","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253351,"question":"SN2-reactions can be usually observed in","choices":[{"text":"Primary alkylı halide","value":"A"},{"text":"secondary alkyl halide","value":"B"},{"text":"Tertiary alkyl halide","value":"C"},{"text":"Both A. and B","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253350,"question":"Alkyl halides are considered to be very reactive compounds towards nucleophiles, because","choices":[{"text":"The have an electrophilic carbon","value":"A"},{"text":"They have an electrophilic carbon and a bad leaving group","value":"B"},{"text":"They have an electrophilic carbon and a good laving group","value":"C"},{"text":"They have a nucleophilic carbon and a good leaving group","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253349,"question":"The rate of E1 reaction depends upon","choices":[{"text":"The concentration of substrate","value":"A"},{"text":"The concentration of substrate as well as nucleophile","value":"B"},{"text":"The concentration Nucleophilic","value":"C"},{"text":"Nature of Catalyst","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253348,"question":"For which mechanisms, the first step involved is the same","choices":[{"text":"E1 and E2","value":"A"},{"text":"E2 and SN2","value":"B"},{"text":"E2 and E1","value":"C"},{"text":"E1 and SN1","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253347,"question":"The average bond energy of C-Br is","choices":[{"text":"228 kJmol-1","value":"A"},{"text":"250 kJmol-1","value":"B"},{"text":"200 kJmol-1","value":"C"},{"text":"290 kJmol-1","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253346,"question":"The carbon atom of an alkyl group attached with halogen atom is called","choices":[{"text":"Electrophile","value":"A"},{"text":"Free redical","value":"B"},{"text":"Nucleophile","value":"C"},{"text":"Nucleophilic centre","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253273,"question":"Hydration of ethene is an example of","choices":[{"text":"Electrophilic addition","value":"A"},{"text":"Electrophilic substitution","value":"B"},{"text":"Nucleophilic addition","value":"C"},{"text":"Nucleophilic substitution","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253272,"question":"Ethyl and methyl groups are equidistant in a chain, the preference is given to?","choices":[{"text":"Ethyl","value":"A"},{"text":"methyl","value":"B"},{"text":"both ethyl and methyl","value":"C"},{"text":"methyl mostly","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253271,"question":"Tertiary alcohols are the easiest to dehydrate because","choices":[{"text":"They form stable carbocation","value":"A"},{"text":"They have less hydrogen","value":"B"},{"text":"They have bigger size","value":"C"},{"text":"They are polar","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253270,"question":"The reaction of alkyl halide in the presence of alcoholic KOH is","choices":[{"text":"Substitution","value":"A"},{"text":"Addition","value":"B"},{"text":"Acid-base","value":"C"},{"text":"Elimination","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253268,"question":"Which group activates the benzene ring","choices":[{"text":"-COOH","value":"A"},{"text":"-COR","value":"B"},{"text":"-CHO","value":"C"},{"text":"-OH","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253267,"question":"Benzene reacts with Ethyl chloride in presence of AICls to give","choices":[{"text":"Benzalchloride","value":"A"},{"text":"Benzyl chloride","value":"B"},{"text":"Ethyl benzene","value":"C"},{"text":"Benzotrichloride","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253266,"question":"Ethene can give all of the following reactions except","choices":[{"text":"Addition","value":"A"},{"text":"Free radical substitution","value":"B"},{"text":"Hydrohalogenation","value":"C"},{"text":"Hydration","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253265,"question":"Active sulphonating agent during sulphonation of benzene is","choices":[{"text":"SO2","value":"A"},{"text":"SO3","value":"B"},{"text":"SO3H","value":"C"},{"text":"SO3+","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253264,"question":"Glyoxal molecule has?","choices":[{"text":"two carbonyl groups","value":"A"},{"text":"One aldehydic and one carbonyl group","value":"B"},{"text":"Two aldehydic groups","value":"C"},{"text":"Two carboxyl group","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253263,"question":"Ethane when completely halogenated in excess of chiorine can form","choices":[{"text":"Hexachloroethane","value":"A"},{"text":"Dichloroethane","value":"B"},{"text":"Pentachloroethane","value":"C"},{"text":"1.1.2.2-terachloroethane","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253261,"question":"The origin ofacidic nature of alkyne is?","choices":[{"text":"small size of C","value":"A"},{"text":"Small size of H","value":"B"},{"text":"polarity of triple bond","value":"C"},{"text":"sp hybridization","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253259,"question":"A compound that has a nucleophilic carbon?","choices":[{"text":"C2H2","value":"A"},{"text":"C2H4","value":"B"},{"text":"C3H8","value":"C"},{"text":"C6H6","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253258,"question":"The addition of HCI to ethene gives?","choices":[{"text":"Chloroethane","value":"A"},{"text":"1,2-dichloroethane","value":"B"},{"text":"1.1-dichloroethane","value":"C"},{"text":"2-chloroethane","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253257,"question":"The reaction that generates an ionic bond is","choices":[{"text":"Halogenation of ethene","value":"A"},{"text":"polymerization of ethene","value":"B"},{"text":"Hydrogenation of ethyne","value":"C"},{"text":"Reaction of ethyne withs sodamide","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253255,"question":"Acetylide can give back ethyne upon treatment with","choices":[{"text":"water","value":"A"},{"text":"strong base","value":"B"},{"text":"dil. Acid","value":"C"},{"text":"weak base","value":"D"},{"value":"E"}],"correctAnswer":3}]