NEET Test Series from KOTA - 10 Papers In MS WORD
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GENERAL ORGANIC CHEMISTRY
231982
The chiral compounds among the following are :
1 (I) and (III)
2 (II) and (IV)
3 (IV) and (V)
4 (IV) and (VI)
Explanation:
(D) : The compound IV and VI have chiral carbon. In these compound $1^{\text {st }} \mathrm{C}$ attached with four different group of atom.
TS EAMCET 05.08.2021
GENERAL ORGANIC CHEMISTRY
231987
Which one among the following cannot exhibit enantiomerism?
1 Diphenyl methanol
2 1-Bromo-2-chlorobutane
3 2-Butanol
4 Tartaric acid
Explanation:
We know that the enantiomers are those compounds which give the mirror image of the compound and the isomerism of the enantiomers compound is termed as enantiomerism. Generally they are non superimposable images. The enantiomers are not identical and they show chiral effect. The compound that does not have chiral carbon does not shows enantiomerism property. 1-Bromo-2-Chlorobutane, 2-Butanol and Tartaric acid. These are enantiomers means it have tendency to rotate plane polarized light. The chiral center is that in which the carbon atom is bonded with four different species. The compound diphenyl methanol does not have any chiral carbon. So according to the principle compound does not have chiral carbon it not show enantiomerism. Thus diphenyl methanol cannot exhibit enantiomerism.
AIIMS-2016
GENERAL ORGANIC CHEMISTRY
231984
Assertion: The melting point of trans-isomer is higher than that of corresponding cis-isomer. Reason: Trans-isomer being symmetrical fits more closely in the crystal lattice than cisisomer.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
Reason - Melting point of alkene depend on the packaging of the molecule. Alkenes have similar melting point to that of alkanes. However in molecule cis isomer packaging in U-bending shape. Therefore it show melting point. While in trans isomer has more symmetry than cis which result in better packing and hence higher melting point.
AIIMS 25 May 2019 (Morning)
GENERAL ORGANIC CHEMISTRY
231990
Tautomerism is exhibited by-
1 (1), (3) and (4)
2 (2), (3), and (4)
3 All of these
4 None of these
Explanation:
Tautomerism is exhibited by compound 1,3 \& 4 because it can be goes under keto-enol tautomerisation. (2) does not show because it does not have $\alpha$ Hydrogen.
231982
The chiral compounds among the following are :
1 (I) and (III)
2 (II) and (IV)
3 (IV) and (V)
4 (IV) and (VI)
Explanation:
(D) : The compound IV and VI have chiral carbon. In these compound $1^{\text {st }} \mathrm{C}$ attached with four different group of atom.
TS EAMCET 05.08.2021
GENERAL ORGANIC CHEMISTRY
231987
Which one among the following cannot exhibit enantiomerism?
1 Diphenyl methanol
2 1-Bromo-2-chlorobutane
3 2-Butanol
4 Tartaric acid
Explanation:
We know that the enantiomers are those compounds which give the mirror image of the compound and the isomerism of the enantiomers compound is termed as enantiomerism. Generally they are non superimposable images. The enantiomers are not identical and they show chiral effect. The compound that does not have chiral carbon does not shows enantiomerism property. 1-Bromo-2-Chlorobutane, 2-Butanol and Tartaric acid. These are enantiomers means it have tendency to rotate plane polarized light. The chiral center is that in which the carbon atom is bonded with four different species. The compound diphenyl methanol does not have any chiral carbon. So according to the principle compound does not have chiral carbon it not show enantiomerism. Thus diphenyl methanol cannot exhibit enantiomerism.
AIIMS-2016
GENERAL ORGANIC CHEMISTRY
231984
Assertion: The melting point of trans-isomer is higher than that of corresponding cis-isomer. Reason: Trans-isomer being symmetrical fits more closely in the crystal lattice than cisisomer.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
Reason - Melting point of alkene depend on the packaging of the molecule. Alkenes have similar melting point to that of alkanes. However in molecule cis isomer packaging in U-bending shape. Therefore it show melting point. While in trans isomer has more symmetry than cis which result in better packing and hence higher melting point.
AIIMS 25 May 2019 (Morning)
GENERAL ORGANIC CHEMISTRY
231990
Tautomerism is exhibited by-
1 (1), (3) and (4)
2 (2), (3), and (4)
3 All of these
4 None of these
Explanation:
Tautomerism is exhibited by compound 1,3 \& 4 because it can be goes under keto-enol tautomerisation. (2) does not show because it does not have $\alpha$ Hydrogen.
231982
The chiral compounds among the following are :
1 (I) and (III)
2 (II) and (IV)
3 (IV) and (V)
4 (IV) and (VI)
Explanation:
(D) : The compound IV and VI have chiral carbon. In these compound $1^{\text {st }} \mathrm{C}$ attached with four different group of atom.
TS EAMCET 05.08.2021
GENERAL ORGANIC CHEMISTRY
231987
Which one among the following cannot exhibit enantiomerism?
1 Diphenyl methanol
2 1-Bromo-2-chlorobutane
3 2-Butanol
4 Tartaric acid
Explanation:
We know that the enantiomers are those compounds which give the mirror image of the compound and the isomerism of the enantiomers compound is termed as enantiomerism. Generally they are non superimposable images. The enantiomers are not identical and they show chiral effect. The compound that does not have chiral carbon does not shows enantiomerism property. 1-Bromo-2-Chlorobutane, 2-Butanol and Tartaric acid. These are enantiomers means it have tendency to rotate plane polarized light. The chiral center is that in which the carbon atom is bonded with four different species. The compound diphenyl methanol does not have any chiral carbon. So according to the principle compound does not have chiral carbon it not show enantiomerism. Thus diphenyl methanol cannot exhibit enantiomerism.
AIIMS-2016
GENERAL ORGANIC CHEMISTRY
231984
Assertion: The melting point of trans-isomer is higher than that of corresponding cis-isomer. Reason: Trans-isomer being symmetrical fits more closely in the crystal lattice than cisisomer.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
Reason - Melting point of alkene depend on the packaging of the molecule. Alkenes have similar melting point to that of alkanes. However in molecule cis isomer packaging in U-bending shape. Therefore it show melting point. While in trans isomer has more symmetry than cis which result in better packing and hence higher melting point.
AIIMS 25 May 2019 (Morning)
GENERAL ORGANIC CHEMISTRY
231990
Tautomerism is exhibited by-
1 (1), (3) and (4)
2 (2), (3), and (4)
3 All of these
4 None of these
Explanation:
Tautomerism is exhibited by compound 1,3 \& 4 because it can be goes under keto-enol tautomerisation. (2) does not show because it does not have $\alpha$ Hydrogen.
231982
The chiral compounds among the following are :
1 (I) and (III)
2 (II) and (IV)
3 (IV) and (V)
4 (IV) and (VI)
Explanation:
(D) : The compound IV and VI have chiral carbon. In these compound $1^{\text {st }} \mathrm{C}$ attached with four different group of atom.
TS EAMCET 05.08.2021
GENERAL ORGANIC CHEMISTRY
231987
Which one among the following cannot exhibit enantiomerism?
1 Diphenyl methanol
2 1-Bromo-2-chlorobutane
3 2-Butanol
4 Tartaric acid
Explanation:
We know that the enantiomers are those compounds which give the mirror image of the compound and the isomerism of the enantiomers compound is termed as enantiomerism. Generally they are non superimposable images. The enantiomers are not identical and they show chiral effect. The compound that does not have chiral carbon does not shows enantiomerism property. 1-Bromo-2-Chlorobutane, 2-Butanol and Tartaric acid. These are enantiomers means it have tendency to rotate plane polarized light. The chiral center is that in which the carbon atom is bonded with four different species. The compound diphenyl methanol does not have any chiral carbon. So according to the principle compound does not have chiral carbon it not show enantiomerism. Thus diphenyl methanol cannot exhibit enantiomerism.
AIIMS-2016
GENERAL ORGANIC CHEMISTRY
231984
Assertion: The melting point of trans-isomer is higher than that of corresponding cis-isomer. Reason: Trans-isomer being symmetrical fits more closely in the crystal lattice than cisisomer.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
Reason - Melting point of alkene depend on the packaging of the molecule. Alkenes have similar melting point to that of alkanes. However in molecule cis isomer packaging in U-bending shape. Therefore it show melting point. While in trans isomer has more symmetry than cis which result in better packing and hence higher melting point.
AIIMS 25 May 2019 (Morning)
GENERAL ORGANIC CHEMISTRY
231990
Tautomerism is exhibited by-
1 (1), (3) and (4)
2 (2), (3), and (4)
3 All of these
4 None of these
Explanation:
Tautomerism is exhibited by compound 1,3 \& 4 because it can be goes under keto-enol tautomerisation. (2) does not show because it does not have $\alpha$ Hydrogen.
