Objective Questions

Questions (2006)

#	Question	Topic	Actions
201	How many asymmetric centers are present in a molecule of 2,4,6-trimethylheptane?	Practice Questions	View
202	Which of the following compounds is never chiral?	Practice Questions	View
203	Which of the following statements is correct concerning a pair of enantiomers?	Practice Questions	View
204	Which of the following is not true of enantiomers?	Practice Questions	View
205	A and B are stereoisomers. They are nonsuperimposable and are mirror images of …	Practice Questions	View
206	Which of the statements is correct about diastereomers?	Practice Questions	View
207	Which of the following is/are optically inactive?	Practice Questions	View
208	Hydrocarbons are	Practice Questions	View
209	Which of following statements is false about propane?	Practice Questions	View
210	Which of the following is a correct name according to the IUPAC rules?	Practice Questions	View
211	A tertiary carbon is bonded directly to :	Practice Questions	View
212	What type of an alkyl group is an isobutyl group?	Practice Questions	View
213	Which molecular formula indicates 2-methylpentane?	Practice Questions	View
214	Which molecular formula indicates 2,2,4-trimethylhexane?	Practice Questions	View
215	How many isomers are possible for butane?	Practice Questions	View
216	How many isomers are possible for 2-methylpropane?	Practice Questions	View
217	How many isomers are possible for pentane?	Practice Questions	View
218	How many isomers are possible for hexane?	Practice Questions	View
219	How many isomers are possible for heptane?	Practice Questions	View
220	Marsh gas mainly contains	Practice Questions	View
221	Which statement is false?	Practice Questions	View
222	As the molecular weight of alkanes increases, how do the boiling point and melt…	Practice Questions	View
223	The branching of alkanes that produces symmetrical structures :	Practice Questions	View
224	How does the melting point of propane and ethane compare?	Practice Questions	View
225	How do the boiling points of butane, propane, and ethane compare?	Practice Questions	View
226	Which of the following alkanes will have the highest boiling point?	Practice Questions	View
227	Which of the following alkanes will have the lowest boiling point?	Practice Questions	View
228	Methane can be prepared by :	Practice Questions	View
229	Which of the following reactions can be used to prepare alkanes?	Practice Questions	View
230	Kolbe's electrolysis of sodium butyrate gives	Practice Questions	View
231	Which of the following classes of compounds is unreactive toward sulfuric acid?	Practice Questions	View
232	Which of the following compounds does not dissolve in concentrated H2SO4 on war…	Practice Questions	View
233	2,3-Dimethyl-2-butene undergoes catalytic hydrogenation to give	Practice Questions	View
234	Why is the halogenation of alkanes considered a chain reaction?	Practice Questions	View
235	The chlorination of methane to give CCl4 is an example of	Practice Questions	View
236	In the chlorination of alkanes, the first step in which chlorine free radicals …	Practice Questions	View
237	Chlorine free radicals react with methane by :	Practice Questions	View
238	Which halogen does not appreciably react with methane in a free-radical substit…	Practice Questions	View
239	What product is formed in the free-radical bromination of methane?	Practice Questions	View
240	Chlorination of an alkane as compared to bromination proceeds	Practice Questions	View
241	How many monochlorinated isomers would result from the reaction of chlorine wit…	Practice Questions	View
242	How many monochlorination products are possible in the reaction of 2,2-dimethyl…	Practice Questions	View
243	A compound of formula C3H8 does not react with bromine in CCl4 in the dark. The…	Practice Questions	View
244	The combustion of Pentane produces :	Practice Questions	View
245	The combustion of one mole of propane, C3H8, produces how many moles of H2O?	Practice Questions	View
246	The major carbon compound formed from the incomplete combustion of a hydrocarbo…	Practice Questions	View
247	1,3-Butadiene reacts with bromine to mainly give	Practice Questions	View
248	The thermal decomposition of alkanes in the absence of air is called :	Practice Questions	View
249	LPG (Household cooking gas) is mainly a mixture of	Practice Questions	View
250	What type of bonding is most important in CH3CH2CH2CH2CH2CH3?	Practice Questions	View
251	What is the name given to a compound containing only carbons and hydrogens and …	Practice Questions	View
252	Which of the following is the best description of propane, CH3CH2CH3, at room t…	Practice Questions	View
253	Choose the correct hybridization for the atom indicated in the molecule below.	Practice Questions	View
254	Which of the following has the greatest solubility in CH3CH2CH2CH3?	Practice Questions	View
255	Consider the three isomeric alkanes n-hexane, 2,3-dimethylbutane, and 2-methylp…	Practice Questions	View
256	The eclipsed and staggered forms of ethane are said to differ in .	Practice Questions	View
257	Octane number is related to	Practice Questions	View
258	A knocking sound is produced in the engine when the fuel	Practice Questions	View
259	The octane rating of gasoline provides information on	Practice Questions	View
260	In any fuel, the percentage by volume of isooctane in a mixture of isooctane an…	Practice Questions	View
261	Which of the following compounds is assigned the Octane Number of zero :	Practice Questions	View
262	Which of the following compounds is assigned the Octane Number of 100 :	Practice Questions	View
263	Gasoline with an octane number of 90 is equivalent in knocking characteristics …	Practice Questions	View
264	A fuel with octane number 90 means it is as good as a mixture of :	Practice Questions	View
265	Which hydrocarbon molecule with eight carbons would produce the lowest octane n…	Practice Questions	View
266	Which of the following compounds is used as an antiknock compound?	Practice Questions	View
267	Which of the following methods can be used to increase the octane rating of gas…	Practice Questions	View
268	The carbon atoms involved in the double bond of an alkene are	Practice Questions	View
269	Which of the following compounds is most stable?	Practice Questions	View
270	In which solvent are alkenes most soluble?	Practice Questions	View
271	Which statements about alkenes and alkanes of corresponding chain lengths is tr…	Practice Questions	View
272	How do the melting points of trans isomers compare to the cis isomers for alken…	Practice Questions	View
273	Why do trans isomers of alkenes have lower boiling points than cis isomers?	Practice Questions	View
274	The major product of acid-catalyzed dehydration of 3-pentanol is :	Practice Questions	View
275	Ethylene is obtained from ethyl bromide by :	Practice Questions	View
276	The dehydrohalogenation of 2-bromobutane with alcoholic KOH gives mainly	Practice Questions	View
277	In the reaction of propene with HCl, H+ ion acts as the :	Practice Questions	View
278	In the reaction of ethylene with H2O in the presence of sulfuric acid, which on…	Practice Questions	View
279	Why does a H+ ion attacking a carbon-carbon double bond add to the carbon with …	Practice Questions	View
280	Propene reacts with bromine to form 1,2-dibromopropane. This is an example of	Practice Questions	View
281	Baeyer's reagent is	Practice Questions	View
282	In the addition of HX to a double bond, the hydrogen goes to the carbon that al…	Practice Questions	View
283	Markovnikov's addition of HBr is not applicable to	Practice Questions	View
284	In the reaction of CH3CH2CH=CH2 with HCl, the H of the HCl will become attached…	Practice Questions	View
285	Which of the following compounds will react most readily with bromine in CCl4?	Practice Questions	View
286	The disappearance of the purple color of KMnO4 in its reaction with alkene is k…	Practice Questions	View
287	Which of the following will give a negative test when treated with bromine in c…	Practice Questions	View
288	Ethylene reacts with HI to give	Practice Questions	View
289	Which of the following reagents will react with propene?	Practice Questions	View
290	Which of the following compounds will have zero dipole moment?	Practice Questions	View
291	2-Methylpropene reacts with HBr to give	Practice Questions	View
292	2-Butene reacts with HBr to give	Practice Questions	View
293	Which of the following alkenes reacts with HBr in the presence of a peroxide to…	Practice Questions	View
294	Propene reacts with HBr in the presence of a peroxide to give	Practice Questions	View
295	2-Methylpropene reacts with HBr in the presence of peroxide to give	Practice Questions	View
296	2-Methyl-2-butene reacts with HBr in the presence of peroxide to give	Practice Questions	View
297	Hydration of 2-methyl-1-propene (with H2O/H2SO4) gives :	Practice Questions	View
298	A compound reacts with steam in the presence of concentrated H2SO4 to give isop…	Practice Questions	View
299	Propene reacts with Cl2 in H2O to give	Practice Questions	View
300	1-Butene reacts with Cl2 in H2O to give	Practice Questions	View

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Questions (2006)