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.
| 401. |
How many stereomeres are possible for following molecule? A. 4B. 8C. 12D. 16 |
| Answer» Correct Answer - D | |
| 402. |
Which of the following statements regarding `1,3`- dimethyl cyclobutane is/are correct?A. Both cis and trans forms are optically active.B. Both cis and trans forms are optically inactive.C. The cis form is optically active, while the trans form is optically inactive.D. The trans form is optically active, while the cis form is optically inactive. |
| Answer» Correct Answer - B | |
| 403. |
The following compounds differ in : A. configurationB. conformationC. structureD. chairality |
| Answer» Correct Answer - C | |
| 404. |
Compound having the same number of atoms of the elements but differ only in the arrangement of the atoms are calledA. isobarsB. osostersC. HomomersD. isomers |
| Answer» Correct Answer - D | |
| 405. |
Which pairs of the salts should have identical solubilities in methanol? A. P and DB. P and RC. P and QD. Q and S |
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Answer» Correct Answer - a P and S are enantiomers, enantiomers have identical solubility. |
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| 406. |
Which of the following statement regarding `1,2`- dimethylcyclopropane (I) and `1,2`- dimethyl cyclobutane (II) are wrongA. Both of them show three stereoisomers.B. The cis form of both is optically inactive (meso) and the trans form the both has a pair of enantiomers.C. The cis form of both has a pair of enantiomers and the trans form of both is optically inactive (meso).D. The meso form of both is optically inactive due to the presence of the centre of symmetry. |
| Answer» Correct Answer - C::D | |
| 407. |
Which pairs of the salts woulg have identical solubilities in methanol ? A. I & IVB. I & IIIC. I & IID. II & IV |
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Answer» Correct Answer - a Enantiomers have same solubility in optically inactive solvents so (I) & (IV) have same solubility because are enantiomers `I to` R-R-Configuration , `II to` S-S-Configuration |
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| 408. |
Which of the following statements are correct?A. Methyl cyclopropane and methyl cyclobutane do not show stereoismerism.B. Both show stereoisomerism.C. Dimethyl cyclopropane shows stereoisomerism, but methyl cyclobutane does not.D. Dimethyl cyclopropane does not show stereoisomerism, but methyl cyclobutane shows. |
| Answer» Correct Answer - A::C | |
| 409. |
Which of the following methods are used for resolution ?A. Biological methods by using special enzymesB. By making their diastereomersC. Chromatographic method using special absorbentsD. Azetotropic distillation |
| Answer» Correct Answer - A::B::C | |
| 410. |
Which of the following statements is/are wrong, about the more stability of chair form than boat form?A. In chair conformation, all the `(C-H)` bonds in adjacent carbons are in the skew position.B. In boat conformation, there are four skew interactions and two eclipsed interaction.C. In a boat conformation, there are three skew interactions and three eclipsed interactions.D. Boat form has an angle strain |
| Answer» Correct Answer - C::D | |
| 411. |
Which of the structures is/are diastereomer of A A. 3B. 1 and 4C. 2 and 3D. 5 |
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Answer» Correct Answer - b Check configuration (R or S) with proper orientation. |
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| 412. |
Which of the following is chiral ?A. Cell phoneB. Spiral staircaseC. ScissorD. All of these |
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Answer» Correct Answer - d Imagine the structure and find out the chirality. |
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| 413. |
Which of the following does not have centre of symmetry?A. B. C. D. |
| Answer» Correct Answer - b,c,d | |
| 414. |
Which of the following will show optical as well as geometrical isomerism?A. B. C. D. None of these |
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Answer» Correct Answer - d (A) `to` Plane of symmetry (B) `to` Plane of symmetry/centre of symmetry (C ) `to` Plane of symmetry and other from of these compounds either has plane of symmetry or centre of symmetry so can t shwo optical isomerism. |
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| 415. |
Intercoversion takes place in :A. acidic mediumB. basic mediumC. both (a) and (b)D. none of these |
| Answer» Correct Answer - c | |
| 416. |
`CH_(2)CH_(2)CH_(2)-Cl` and `CH_(3)-underset(CH)underset(|)(CH)-CH_(3)` shows which type isomerismA. Chain isomersB. position isomersC. Functional isomersD. Metamers |
| Answer» Correct Answer - B | |
| 417. |
Above iterconversion takes place inA. Acidic mediumB. Basic mediumC. BothD. None |
| Answer» Correct Answer - C | |
| 418. |
Which of the following show geometrical isomerismA. B. C. D. |
| Answer» Correct Answer - D | |
| 419. |
`CH_(3)CH_(2)COOH` and `CH_(3)-overset(O)overset(||)(C)-O-CH_(3)` express which of isomerismA. position isomersB. chain isomersC. metamersD. functional isomers |
| Answer» Correct Answer - D | |
| 420. |
`CH_(3)-CH=CH_(2)` and `triangle` express which type of isomerismA. Ring chain isomersB. chain isomersC. position isomersD. Metamers |
| Answer» Correct Answer - A | |
| 421. |
`CH_(3)CH_(2)CH_(2)NH_(2),CH_(3)CH_(2)NHCH_(3)` and `CH_(3)-underset(CH_(3))underset(|)(N)-CH_(3)` express which of isomerismA. functional isomersB. chain isomersC. metamersD. Position isomers |
| Answer» Correct Answer - A | |
| 422. |
Shows which type of isomerismA. functional group of isomerismB. geometrical isomerismC. metamerismD. Position isomers |
| Answer» Correct Answer - A | |
| 423. |
`CH_(3)CH_(2)CH_(2)-OH` and `CH_(3)-underset(OH)underset(|)(CH)-CH_(3)` shows which type of isomerismA. Chain isomersB. position isomersC. Functional isomersD. Metamers |
| Answer» Correct Answer - B | |
| 424. |
Select the optically active compound among the following :A. B. C. D. |
| Answer» Correct Answer - b | |
| 425. |
Total number of stereoisomers of the compound `CH_(3)-CH=CH-underset(OH)overset(|)(CH)-CH=CH-CH_(3)` isA. 2B. 3C. 4D. 8 |
| Answer» Correct Answer - C | |
| 426. |
Predict the number of stereoisomers in `CH_(2)OH.(CHOH)_(4).CHO`.A. 16B. 8C. 4D. 2 |
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Answer» Correct Answer - A Terminal groups are different. The number of asymmetric `C` atoms is four `(HOCH_(2)overset(**)CH(OH)overset(**)CH(OH)overset(**)CH(OH)overset(**)CH(OH)CH_(2)OH)` Therefore, the number of stereiosomers (optical isomers) is `2^(n)=2^(4)=16` (where `n` is the number of asymmetrical `C` atoms) |
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| 427. |
STATEMENT-1: STATEMENT-2: Molecules containing plane of symmetry or centre of symmerty are optically inactive.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-6C. Statement-1 is True, Statement-2 is False.D. Statement-1 is False, Statement-2 is True. |
| Answer» Correct Answer - a | |
| 428. |
The formula of disheylnethane How many structural are possible when one of the hydrogen is replaced by a chlorine atom ?A. 6B. 4C. 8D. 7 |
| Answer» Correct Answer - B | |
| 429. |
How many H are replaced by D on prolonged treament in the following? `CH_(3)-overset(O)overset(||)C-underset(Ph)underset(|)Ph=overset(Ph)overset(|)C-Me underset(D_(2)O)overset(D^(o+))rarr` |
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Answer» Correct Answer - 6 `CD_(3)-overset(O)overset(||)C-underset(ph)underset(|)C=overset(Ph)overset(|)C-CD_(3)` 6 H will be replaced by deuterium. |
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| 430. |
The enol form of acetone after treatment with `D_(2)O` gives:A. `CD_(3)-overset(O)overset(||)(C)-CD_(3)`B. `CH_(3)-overset(OD)overset(|)(C)=CH_(2)`C. `CH_(2)=overset(OH)overset(|)(C)-CH_(2)D`D. `CD_(2)=overset(OD)overset(|)(C)-CD_(3)` |
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Answer» Correct Answer - B Hydrogen of the hydroxyl group of the enol form of acetone is exchanged by deuterium: `CH_(2)=overset(OH)overset(|)(C)-CH_(3)hArrCH_(2)=overset(OD)overset(|)(C)-CH_(3)` |
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| 431. |
What will be the number of hydrogen atoms (Y) replaced by D on prolonged treatment with `D^(o+)//D_(2)O` ? |
| Answer» Correct Answer - 8 | |
| 432. |
The enol from of acetone, after treatment with `D_(2)O,` givesA. `H_(3)C-overset(OD)overset(|)C=CH_(2)`B. `D_(3)C-overset(O)overset(||)C=CD_(3)`C. `H_(2)C=overset(OH)overset(||)C-CH_(2)D`D. `D_(2)C=overset(OD)overset(||)C-CD_(3)` |
| Answer» Correct Answer - b | |
| 433. |
After prolonged treatment of (A) by `D_(2)O"//DO^(-),` the difference in molecilear weights compound (A) and (B) is :A. 2B. 3C. 4D. 8 |
| Answer» Correct Answer - c | |
| 434. |
Number of optically active isomer is/are : |
| Answer» Correct Answer - a | |
| 435. |
S(+) Mono Sodium Glutamate (MSG) is a flavour enhancer used in many foods. Fast foods often contain substantial amount of MSG and is widely used in Chines food. If one mole of above MSG was placed in 845 ml solution and passed through 200 mm tube, the observed rotation was found to be `+9.6^(@)`. If 33.8g of (+) MSG was put in 338 ml solution and was mixed with 16.9 g of (-) MSG put in 169 ml solution and the final solution was passed through 400 mm tube. find out observed rotation of these final solution.A. `+1.6^(@)`B. `+4.8^(@)`C. `+3.2^(@)`D. none of these |
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Answer» Correct Answer - C [(+) MSG `rArr ` 33.8 gm in 338 ml (-) MSG `rArr` 16.9 gm in 169 ml Optical purity in mixture (+) MSG =16.9 gm in 507 ml solution `C=16.9 /507 gm//ml " " l=4 dm` `theta_("Observed")=[theta^(@)]xxC.l. " " =24xx16.9/507 xx4=+3.2^(@)]` |
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| 436. |
`underset(hv)overset(Cl_(2))rarr` A mixture of all isomers possible from the mono-chlorination the structures is subjected to fractional distillation, then how many fractions will be obtaineA. 2B. 3C. 4D. 5 |
| Answer» Correct Answer - b | |
| 437. |
Calculate valur of x+y+z+if `xto` Number of chiral centre. `yto` Number of prochiral centre. `zto` Number of psudeo chiral centre. |
| Answer» Correct Answer - 18 | |
| 438. |
Alcohol and ehter express which type of isomerimsA. position isomersB. chain isomersC. metamersD. functional isomers |
| Answer» Correct Answer - D | |
| 439. |
STATEMENT -1: 2,3-dimethyl butane is a meso compound. STATEMENT-2: It has plane of symmetry so it is sptically inactive due to internal compensation.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-14C. Statement-1 is True, Statement-2 is False.D. Statement-1 is False, Statement-2 is True. |
| Answer» Correct Answer - d | |
| 440. |
Total number of isomers for the molecule,`C_(3)H_(6)DCI` is : 3A. 3B. 4C. 6D. 8 |
| Answer» Correct Answer - D | |