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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.
| 301. |
Correct statement about given ketoxime is: A. (A) is named as syn-p-toylpheny ketoximeB. (A) is named as anti-phenyl-p-tolyl ketoximeC. compound (A) is Z isomeerD. compound (A) is E isomer |
| Answer» Correct Answer - a,b,c | |
| 302. |
Compound which show optical isomersm is/are :A. B. C. D. |
| Answer» Correct Answer - a,b,c | |
| 303. |
The correct statemetents about the compounds I,II and III A. I and II are identicalB. I and II are diasterometrsC. I and II are enantiomersD. I and II are enantiomers |
| Answer» Correct Answer - A | |
| 304. |
The correct statemetents about the compounds I,II and III A. (I) and (II) are identicalB. (I) and (II) are diastereomersC. (I) and (III) are enantiomersD. (I) and (II) are enantiomers |
| Answer» Correct Answer - d | |
| 305. |
The structure `H_(3)C` A. geometrical isomerismB. optical isomerismC. geometrical and optical isomerismD. tautomerism |
| Answer» Correct Answer - b | |
| 306. |
How many optically active stereoisomers are possible for butane-2, 3-diol ?A. 1B. 2C. 3D. 4 |
| Answer» Correct Answer - b | |
| 307. |
Order of enolic content(P) (Q) `Me-underset(O)underset(||)C-underset(O)underset(||)C-Me` (S) `Me-underset(O)underset(||)C-CH_(2)-underset(O)underset(||)C-Me`A. `QgtRgtSgtP`B. `PgtRgtSgtQ`C. `PgtSgtRgtQ`D. `SgtRgtPgtQ` |
| Answer» Correct Answer - c | |
| 308. |
Which of the following is/are incorrect order of percentage enolic content?A. B. C. D. |
| Answer» Correct Answer - a,b,d | |
| 309. |
Which of the following gives an optically inactive aldaric acid on oxidatin with dilute nitric acid ?A. B. C. D. |
| Answer» Correct Answer - d | |
| 310. |
Which isomer of hexane has only two different sets of structurally equivalent hydrogen atoms?A. 2,2-dimethylbutaneB. 2-methylpentaneC. 3-methylpentaneD. 2,3-dimethylbutane |
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Answer» Correct Answer - D Draw the complete structural formula of every compound and examine the chemical environment of every H atom: It has types of replaceable H atoms: primary `(1^@)` and secondary `(2^@)` H atoms. `overset(1^(@))(C)H_(3)-underset(underset(1^(@))CH_(3))underset(|)(overset(2^(@))(C))H-underset(underset(1^(@))(C)H_(3))underset(|)overset(2^(@))(C)H-overset(1^(@))(C)H_(3)` It has two types of replaceable H atoms primary `(1^(@))` and secondary `(2^(@))` H atoms. |
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| 311. |
Constitutional isomers are isomers that differ bacauseA. they have different numbers of atomsB. they have different kinds of atomsC. they have different arrangement of their atoms in spaceD. their atoms are connected in a different order |
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Answer» Correct Answer - D They are said to have a different connectivity. |
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| 312. |
Two constitutional isomers which exist together in equilibrium at room temperature are calledA. rotamersB. conformersC. tautomersD. mesomors |
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Answer» Correct Answer - C Tautomers are interconvertible and, thus, exist in dynamic equilibrium. |
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| 313. |
Among these give ease of enolizationA. 3> 1> 2B. 3 |
| Answer» Correct Answer - A | |
| 314. |
Which of the following will not have any stereoismer ?A. B. C. D. |
| Answer» Correct Answer - C | |
| 315. |
Which of the following molecules has a meso stereoismer ?A. `CH_(3)-overset(Cl)overset(|)(CH)-CH_(2)-overset(Br)overset(|)(CH)-CH_(3)`B. trans 2- hexeneC. `CH_(3)-underset(CI)underset(|)(CH)-CH_(2)-CH_(2)-CI`D. `CH_(3)CH_(2)underset(CI)underset(|)(CH)-underset(CI)underset(|)(CH)-CH_(2)CH_(3)` |
| Answer» Correct Answer - D | |
| 316. |
Which of the following is a chiral molucule ?A. 1-chloroB. 2-chloro propaneC. 1- chloro butaneD. 2- chloro butane |
| Answer» Correct Answer - D | |
| 317. |
Which of the following compounds will exhibits trans (geometrical) isomerism ?A. 2-ButeneB. 2-ButyneC. 2-ButanalD. Butanal |
| Answer» Correct Answer - a | |
| 318. |
Which of the following compoung is non-resovable (meso) compounds ?A. B. C. D. All of these |
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Answer» Correct Answer - d Meso has plane of symmetry with chiral centre. |
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| 319. |
The number of structure isomers possible from the molecular formula `C_(3)H_(9)N` is: |
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Answer» Correct Answer - 4 Possible isomers of `C_(3)H_(9)N` `CH_(3)-CH_(2)-underset(NH_(2))underset(|)CH_(2),CH_(3)-underset(NH_(2))underset(|)CH-CH_(2),` `CH_(3)-CH_(2)-NH-CH_(3),CH_(3)-overset(CH_(3))overset(|)N-CH_(2)` |
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| 320. |
Which of the following statements are correct :A. Any chiral compound with a single asymmetric carbon must have a positive optical rotation if the compound has the R configurationB. If a structure has no plane of symmetry it is chiralC. All asymmetric carbons are stereocentres.D. Alcohol and ether are functional isomers. |
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Answer» Correct Answer - A::C::D Single chiral carbon have two form dexlro totatory and laevorotatory. Chiral carbon or Asymmetric carbon is always stereo centre. `underset("alcohol")(CH_(3)-CH_(2)-OH)` and `CH_(3)-O-CH_(3)` ether Ehter and alcohol are functional isomers. |
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| 321. |
Choose the correct relation between `l_(1)` and `l_(2)` ?A. `l_(1)=l_(2)`B. `l_(2) gt l_(2)`C. `l_(1) lt l_(2)`D. `l_(2)=2l_(1)` |
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Answer» Correct Answer - a Terminal hydrogens are perpendicular to each other `" "thereforel_(1)=l_(2)` |
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| 322. |
How many geohmetrical isomers are possible for the above compound ? |
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Answer» Correct Answer - b cis & trans. |
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| 323. |
How many geometrical isomers are possible for the above compound ? |
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Answer» Correct Answer - b E & Z |
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| 324. |
How many geometrical isomers are possible for the above compound ? |
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Answer» Correct Answer - b cis & trans. |
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| 325. |
How many geometrical isomers are possible for the above compound ? |
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Answer» Correct Answer - b E and Z |
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| 326. |
Which of the statements are correct for alkyne with molecular formula `C_6H_(10)`?A. FourB. FiveC. ThreeD. Six |
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Answer» Correct Answer - A Terminal alkynes have triple bond at the end of a carbon chain. |
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| 327. |
Match the following structural formulae with their possible geometrical isomers |
| Answer» Correct Answer - a-s ; b-r ; c-q ; d-p | |
| 328. |
Most stable from of meso-2, 3-diflouro-2, 3-butandiol is :A. B. C. D. |
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Answer» Correct Answer - c A and B are not meso compound. C have two intra molecular H-bonds as compared to one in D. |
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| 329. |
Most stable from of meso-2,3-butandiol is :A. B. C. D. |
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Answer» Correct Answer - a A is most stable due to intramolecular H-bonding C and D are not meso. |
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| 330. |
Among the fllowing pairof compounds geometrical isomers are :A. B. C. D. does not above |
| Answer» Correct Answer - c | |
| 331. |
In the Newman projection for `2,2`- dimethylbutane `X` and `Y` can, respectively, beA. `H` and `H`B. `H` and `C_(2)H_(5)`C. `C_(2)H_(5)` and `H`D. `CH_(3)` and `CH_(3)` |
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Answer» Correct Answer - B::D `H_(3)underset(4)(C)-underset(3)(C)H_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C_(2))-underset(1)(C)H_(3)` On `C_(2)-C_(3)` bound axis, `X=CH_(3)` `Y=CH_(3)` On `C_(1)-C_(2)` bond axis, `X=H` `Y=C_(2)H_(5)` |
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| 332. |
In the Newman projection for `2,2`- dimethylbutane `X` and `Y` can, respectively, beA. H and HB. H and `C_(2)H_(5)`C. `C_(2)H_(5)` and HD. `CH_(3)` and `CH_(3)` |
| Answer» Correct Answer - b,d | |
| 333. |
In the Newman projection for `2,2`- dimethylbutane `X` and `Y` can, respectively, beA. H and HB. H and `C_(2)H_(5)`C. `C_(2)H_(5)` and HD. `CH_(3)` and `CH_(3)` |
| Answer» Correct Answer - b,d | |
| 334. |
A 1.20 gm sample od cocaine, `[alpha]_(D)=-16^(@)` was dissolvedin 7.50 mL of cholroform and placed in polarimeter tube having a path length of 5.00 am calculate the observed rottion.A. `+1.3^(@)`B. `-2.6^(@)`C. `+2.6^(@)`D. `-1.3^(@)` |
| Answer» Correct Answer - d | |
| 335. |
compound is projection formula ofA. CyclohexaneB. CyclopropaneC. CyclobytaneD. Cyclopropane |
| Answer» Correct Answer - C | |
| 336. |
Which one of the following is most stable ?A. B. C. D. |
| Answer» Correct Answer - A | |
| 337. |
Correct order of stability amont the following A. c>d>b>aB. c < d < b < aC. c>b>d>aD. c>b=d>a |
| Answer» Correct Answer - A | |
| 338. |
The correct stability order of the following speicies is A. cltaltbB. c=bltaC. clta=bD. a=b=c |
| Answer» Correct Answer - C | |
| 339. |
Select resolvable compouns :A. B. C. D. none of these |
| Answer» Correct Answer - B | |
| 340. |
Among the given compounds, the correct order of enol content is :A. `I gt II gt III`B. `III gt II gt I`C. `II gt I gt III`D. `II gt III gt I` |
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Answer» Correct Answer - c `II gt I gt III` Stability order of enol from. |
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| 341. |
Among these compounds, the order of enol content should beA. `II gt III gt I`B. `I gt II gt III`C. `III gt II gt I`D. `I gt III gt II` |
| Answer» Correct Answer - B | |
| 342. |
Total number of isomeric alkene possible with compound having molecular formula `C_(4)H_(8)` isA. 2B. 3C. 4D. 5 |
| Answer» Correct Answer - d | |
| 343. |
How many pair (s) of geometrical isomers are possible with `C_(6)H_(12) `(only in open chain structures) |
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Answer» Correct Answer - [4] `CH_(3)-CH_(2)-CH_(2)-CH=CH-CH_(3)rArr` cis and trans `CH_(3)-CH_(2)-CH=CH-CH_(2)-CH_(3)rArr` cis and trans `CH_(3)-CH_(2)-underset(CH_(3))underset(|)(C)=CH-CH_(3) rArr` cis and trans `CH_(3)-underset(CH_(3))underset(|)(C)H-CH=CH-CH_(3)rArr` cis and trans |
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| 344. |
Pentan-2-one and 3-methylbutanone are a pair of isomers.A. stereoB. positionC. functionalD. chain |
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Answer» Correct Answer - D `CH_(3)COCH_(2)CH_(2)CH_(3)` and `CH_(3)COoverset(CH_(3))overset(|)(C)HCH_(3)` differ in their carbon skeletons. Thus they are chain isomers. |
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| 345. |
If the both compound (A) and (B) are optically active, the possible structrue of (A) is:A. `cis-I`B. `trans-I`C. `cis-II`D. `trans-II` |
| Answer» Correct Answer - C::D | |
| 346. |
If the both compoundsd (A) and (B) are optically inactive, the possible structrue of (B) are:A. B. C. D. All |
| Answer» Correct Answer - A | |
| 347. |
The possible structrue of (A) is :A. B. trans(I),C. D. trans, (II) |
| Answer» Correct Answer - A::B | |
| 348. |
The number of primary, secondary and tertiary amines possoble with the molecular formula `C_(3)H_(9)N` respectively :A. 1,2,2B. 1,2,1C. 2,1,1D. 3,0,1 |
| Answer» Correct Answer - c | |
| 349. |
Total number of benzenoid aromatic isomers having formula `C_(7)H_(7)Cl` :A. 4B. 3C. 5D. 6 |
| Answer» Correct Answer - a | |
| 350. |
Examine the following structural formulas and select those that are chiral. |
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Answer» Correct Answer - b,e,f,g,h,i Select optically active compounds do not have P.O.S. and C.O.S.. |
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