InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Tautomer of following compound is : A. B. C. D. |
| Answer» Correct Answer - a,c,d | |
| 252. |
Which of the following is/are correct matchings ?A. `CH_(3)-overset(O)overset(||)C-OH and H-overset(O)overset(||)C-OCH_(3)" "-"Metamers"`B. `CH_(3)-CH_(2)-C-=CH" "-"Position"` and `CH_(3)-C-=C-CH_(3)" ""isomers"`C. `CH_(3)CH_(2)CH_(2)NH_(2)" ""Tautomers"` and `CH_(3)-underset(NH_(2))underset(|)CH-CH_(3)`D. `CH_(3)CH_(2)OHand (CH_(3))_(2)O" "` -Function isomer |
| Answer» Correct Answer - b,d | |
| 253. |
How many structures of `2^(@)` amones are possible by `C_(5)H_(13)N`(without counting stereoisomers)?A. 4B. 5C. 6D. 7 |
| Answer» Correct Answer - c | |
| 254. |
On heating slowly `mu` of `Cl-CH_(2)CH_(2)-Cl` will:A. increaseB. decreaseC. remains sameD. not effected |
| Answer» Correct Answer - a | |
| 255. |
Which of the following isomeric structrur have lowest energy?A. B. C. D. |
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Answer» Correct Answer - d `A to 1,2, aa,B to 1,4,aa,C to 1,3,ae,D to 1,3,ee.` |
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| 256. |
Select correct statement(s).A. have two stereoisomersB. have six prochiral centreC. have three chiral centreD. is optically active |
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Answer» Correct Answer - b,d (b) have 4 prochirla carbon (d) it is chiral but not resolvable |
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| 257. |
Select correct option (s).A. both shows geometrical isomersB. is always optically inactiveC. All geometrical isomers are diasteroisomer of each otherD. is optically active |
| Answer» Correct Answer - d | |
| 258. |
Which statement is correct for keto-enol tautomerism?A. Tautomersim is catalysed by acid and base.B. Tautomers are Presemt in dynamic equilibrium state.C. Generally keto from is stable than enol form in mono ketones.D. Atomic arragements are same in tautomerism. |
| Answer» Correct Answer - a,b,c | |
| 259. |
Correct statement about following compound is/are : A. It can show geometrical isomerismB. It is having four chiral centreC. It is having three optical isomersD. It is having only one optical inactive stereoisomer |
| Answer» Correct Answer - a,b,c,d | |
| 260. |
Select incorrect statement (s).A. Tortional strain in gauche from is more than that of anti form of butance.B. Number of state conformation of n-butane are three.C. Cyclopropane exist in staggered from.D. Most stable form of propene is eclipsed from. |
| Answer» Correct Answer - a,c | |
| 261. |
Select correct order of stabillity.A. 1,2-dimethycyl cylohexane`" "cis gt trans`B. 1,3-dimethyl cyclohexane `" "cis gt trans`C. Cyclooctene `" "cis gt trans`D. Cycoltetradecane `" "cis gt trans` |
| Answer» Correct Answer - b,c,d | |
| 262. |
Select the chiral molecule.A. B. C. D. |
| Answer» Correct Answer - a,b,c,d | |
| 263. |
Select chiral molecule.A. MeNHEtB. trans decalinC. D. |
| Answer» Correct Answer - a,b,d | |
| 264. |
`C_(3)` AOS is present in :A. B. C. D. inorganic genzene |
| Answer» Correct Answer - a,b,c,d | |
| 265. |
STATEMENT-1: STATEMENT-2: No symmetry element is present in above compound.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1.B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-9C. Statement-1 is True, Statement-2 is False.D. Statement-1 is False, Statement-2 is True. |
| Answer» Correct Answer - d | |
| 266. |
How many chiral centres are present in A. 5B. 6C. 7D. 8 |
| Answer» Correct Answer - c | |
| 267. |
Compound which show potical isomerism is/are :A. B. C. D. |
| Answer» Correct Answer - a,b,c | |
| 268. |
Which of the following are identical molecules?A. B. C. D. |
| Answer» Correct Answer - A::B::C | |
| 269. |
Which of the following compounds have the plane of symmetry?A. B. C. D. |
| Answer» Correct Answer - A::B::D | |
| 270. |
Which of the following statements are true about these molecules?A. I and II are a pair of enantiomersB. III is metamer of I and IIC. III is diastereomer of I and IID. III is not stereoisomer of I and II |
| Answer» Correct Answer - A::B::D | |
| 271. |
Statement I: 5,5-dimethyl-1,3-cyclohexanedione exists predominantely in its enol form, but 2,2-dimethyl-1,3-cyclohexanedione does not. Statement II: 2,2-dimethyl-1,3-cylcohexane dione has less `alpha-`hydrogen atoms than 5,5-dimethyl -1,3-cyclohexanedioene.A. If both statement-I and statement II are true & the statement II is a correct explanation of the statement IB. If both statemetn -I and Statement II are True and Statement II is not a correct explanation of the Statement IC. If Statement -I is True but the Statement -II is falseD. If Statement -I is false but the Statement -II is True. |
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Answer» Correct Answer - B [The enol from of 5,5-dimethyl-1,3-cyclohexanedione is stable due to chelation, but same is not true in 2,2-dimethyl 1,3-cyclohexanedione due to absence of `alpha`-hydrogen because it is not having more acidic hydrogen]. |
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| 272. |
The structures shown here are related as being A. conformersB. enantiomersC. geometrical isomersD. diastereoisomers |
| Answer» Correct Answer - d | |
| 273. |
Meso-tartaric acid and d-tartaric acid areA. positional isomersB. enantiomersC. diastereomersD. racemic mixture |
| Answer» Correct Answer - c | |
| 274. |
STATEMENT-1: STATEMENT-2: A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1.B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-13C. Statement-1 is True, Statement-2 is False.D. Statement-1 is False, Statement-2 is True. |
| Answer» Correct Answer - c | |
| 275. |
What is the maximum number is stereoisomers that could for the compound below ? A. 6B. 8C. 10D. 16 |
| Answer» Correct Answer - C | |
| 276. |
Which one of the following is chiral ?A. 1,1- Dibromo-1 chloropropaneB. 1,3-Dibrimo-1 -ChloropropaneC. 1,1-Diobromo-3 ChloropropaneD. 1,3- Dibromo-2 Chloropropane |
| Answer» Correct Answer - B | |
| 277. |
The above comnpound has :A. Plane is symmetryB. axis of symmetryC. Center of symmetryD. not any symmrtry |
| Answer» Correct Answer - C | |
| 278. |
Total number of stereoisomers of the compound 2, 4 dichloroheptane are :A. 2B. 3C. 4D. 6 |
| Answer» Correct Answer - C | |
| 279. |
Which number of Stereoisomers of the compound shown optical isomerism ?A. `CH_(3)CH_(2)CH_(3)`B. `CH_(2)OHCHOHCH_(2)OH`C. `CH_(3)CHOHC_(2)H_(5)`D. `CCl_(2)_F_(2)` |
| Answer» Correct Answer - C | |
| 280. |
Which of the following will show geometrical isomerism?A. B. C. D. |
| Answer» Correct Answer - d | |
| 281. |
Dipole moment is shown by :A. 1,4-dichlorobenzenB. cis-1,2-dichloroethaneC. trans-1, 2-dichloroetheneD. trans-1,2-dichloro-2-pentene |
| Answer» Correct Answer - b,d | |
| 282. |
Which species have a plane of symmetry?A. B. C. D. |
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Answer» Correct Answer - d (b) is non-planar due to repulsion between two -Me groups. (d) is having slice POS. |
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| 283. |
The correct stability order of the following species is : A. `CltAltB `B. `AltBltA `C. `CltAltB `D. `AltBltC ` |
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Answer» Correct Answer - c (a) Trans 1,2-dimethylcyclohexane equatorial-equatorial position (b) Trans 1,2-dimethyl cyclohexane equatorial-equatorial position (c ) Trans 1,2-dimethyl cyclohexane axial-axial position |
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| 284. |
What is correct about x and y? A. Both are achiral moleculesB. Both contains chiral carbonC. Both are mesoD. Both having centre of symmetry in most stable configuration |
| Answer» Correct Answer - a,d | |
| 285. |
Which of the following compounds is chiral ?A. `BrCH_(2)CH_(2)CH_(2)CH_(2)CH_(3)`B. `CH_(3)CH_(2)overset(Br)overset(|)(C)HCH_(2)CH_(3)`C. `CH_(3)underset(Br)underset(|)(C)=C=CHCH_(3)`D. none of these |
| Answer» Correct Answer - D | |
| 286. |
Which will show geometrical isomerism?A. B. C. D. |
| Answer» Correct Answer - a,b,c | |
| 287. |
Match the column (I) and (II). |
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Answer» Correct Answer - a-p; b-q; c-s; d-r (a) Dihedral angle `=0^(@),360^(@) to` fully eclipsed (b) Dihedral angle `=60^(@),300^(@) to` partically eclipsed (c ) Dihedral angle `=180^(@) to`staggered/anti (d) Dihedral angle `=120^(@),240^(@) to` Gauche |
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| 288. |
Match the column (I) and (II). |
| Answer» Correct Answer - a-p; b-q; c-r; d-p | |
| 289. |
Match the Column (I) and (II). (Matrix) |
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Answer» Correct Answer - a-p,s; b-q, r,s; c-q,r, s; d-p,s Chiral molecules:- Those molucules which do not have plane of symmetry, centre of symmetry are optically active and are optically active and are not superimposable on their mirror images and are known as chiral molecules vice-versa are achiral, Chirla centre:- Tetrahedrally bonded atom having four different groups are known as chiral centres. Meao:- Compound having two or more than two chiral center and posses P.O.S./C.O.S. are meso isomer they become optically inactive due to internal compensation P.O.S. absent. |
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| 290. |
Match the column : |
| Answer» Correct Answer - a-s; b-p; c-q; d-r | |
| 291. |
Some compounds are given below : How many compounds are chiral ? A. 5B. 4C. 2D. 6 |
| Answer» Correct Answer - b | |
| 292. |
Which of the following gcompounds has a stereoisomer that is a meso compund?A. 2,-4-dibromohexneB. 2,3-dibromobuteC. 2,4-dimethylpentaneD. hexane-2,5-diol |
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Answer» Correct Answer - b,d (a) do not have plane of symmetry (c ) has plane of symmetry and no internal compensation `therefore` It is meso. |
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| 293. |
Which of the following is incorrect regarding tautomerism?A. It is a special kind of functional isomericm.B. Tautomers exist in static equilibrium with each other.C. it arises due to the migration of a hydrogen atom from one polyvalent atom to the other within the same molecule.D. it leads to the rearrangement of linkages. |
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Answer» Correct Answer - B Tautomers are interconvertible as they exist in dynamic equilibrium. |
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| 294. |
Match the Column (I) and (II) |
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Answer» Correct Answer - a- q; b-p; c-r; d-s (a) Total No. of stereoisomers `=2^(n)`, When molecule is unsymmetrical. (b) When molecule is symmetrical, total no. of stereoisomers (I) When n= even Total isomers `=2^(n-1)+2^(n//2-1)` (II) When n = odd. Total isomers `=underset("Optically active ")((2^(n-1)-2^((n-1)/2))+underset("meso")2^((n-1)/2))` |
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| 295. |
Some compounds are given below : How many compounds are chiral and also have chiral centre? A. 5B. 4C. 2D. 6 |
| Answer» Correct Answer - c | |
| 296. |
Which of the following compund is/are meso?A. B. C. D. |
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Answer» Correct Answer - a,b,c,d All compounds contain plane of symmetry |
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| 297. |
Select the incorrect statement from the following :A. `CH_(3)-COOH` can give effervescence of `CO_(2)` B. C. D. |
| Answer» Correct Answer - b,c,d | |
| 298. |
Sum X + Y = ?A. 1B. 3C. 4D. 0 |
| Answer» Correct Answer - d | |
| 299. |
Number of diastereomers possible for A. 1B. 2C. 4D. 0 |
| Answer» Correct Answer - d | |
| 300. |
Assertion (A): The cis form of `(CH_(3)-underset(Cl)underset(|)(CH)-CH=CH-underset(Cl)underset(|)(CH)-CH_(3))` exist in three-diastereomers. Reason (R ): One form is optically inactive due to the presence of centre of symmetry. |
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Answer» Correct Answer - c Total 6 forms are present in which 3 are cis and 3 are trans 2 forms are in cis. |
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