NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323982
Assertion : In sodium formate, both the C-bonds have same value 1.27 \( \mathop {\rm{A}}^{\circ} \) Reason : Equal bond length is due to the phenomenon of resonance.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sodium formate, with a linear geometry, displays equal C-O bond lengths 1.27 \( \mathop {\rm{A}}^{\circ} \) in the formate ion due to its symmetric structure and even electron density distribution between the identical oxygen atoms. So the option (1) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323983
Assertion : The carbon atom in carbonyl group is \(\mathrm{sp}^{2}\) hybridised. Reason :
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
The bond energy of a carbonyl group is typically around \(179 \mathrm{kcal} / \mathrm{mol}\), whereas in the absence of resonance, it is approximately 145.8 \(\mathrm{kcal} / \mathrm{mol}\). The carbonyl group exhibits resonance, which contributes to its higher bond energy. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323984
The number of \({\mathrm{\alpha-\mathrm{H}}}\) atoms in 2-methylcyclohexanone is ____ .
1 2
2 4
3 3
4 1
Explanation:
There are \(3\alpha - {\text{H}}\)-atoms.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323985
Which of the following statement is not true about \(>\mathrm{C}=\mathrm{O}\) group?
1 The carbon atom of the carbonyl group is \({\rm{s}}{{\rm{p}}^{\rm{2}}}\) hybridised
2 The \(>\mathrm{C}=\mathrm{O}\) bond length is longer than that \(>\mathrm{C}=\mathrm{C} < \) bond length
3 The dipole moment of aldehydes and ketones lie in the range of \({\rm{2}}{\rm{.3 - 2}}{\rm{.8}}\,\,{\rm{D}}\)
4 The portion of the molecule immediately surrounding the carbonyl group is planar
Explanation:
The bond length of \(>\mathrm{C}=\mathrm{O}\) is \({\rm{1}}{\rm{.2}}\mathop {\rm{A}}\limits^{\rm{o}} \) The bond length of \(>\mathrm{C}=\mathrm{C} < \) is \({\rm{1}}{\rm{.34}}\mathop {\rm{A}}\limits^{\rm{o}} \)
323982
Assertion : In sodium formate, both the C-bonds have same value 1.27 \( \mathop {\rm{A}}^{\circ} \) Reason : Equal bond length is due to the phenomenon of resonance.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sodium formate, with a linear geometry, displays equal C-O bond lengths 1.27 \( \mathop {\rm{A}}^{\circ} \) in the formate ion due to its symmetric structure and even electron density distribution between the identical oxygen atoms. So the option (1) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323983
Assertion : The carbon atom in carbonyl group is \(\mathrm{sp}^{2}\) hybridised. Reason :
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
The bond energy of a carbonyl group is typically around \(179 \mathrm{kcal} / \mathrm{mol}\), whereas in the absence of resonance, it is approximately 145.8 \(\mathrm{kcal} / \mathrm{mol}\). The carbonyl group exhibits resonance, which contributes to its higher bond energy. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323984
The number of \({\mathrm{\alpha-\mathrm{H}}}\) atoms in 2-methylcyclohexanone is ____ .
1 2
2 4
3 3
4 1
Explanation:
There are \(3\alpha - {\text{H}}\)-atoms.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323985
Which of the following statement is not true about \(>\mathrm{C}=\mathrm{O}\) group?
1 The carbon atom of the carbonyl group is \({\rm{s}}{{\rm{p}}^{\rm{2}}}\) hybridised
2 The \(>\mathrm{C}=\mathrm{O}\) bond length is longer than that \(>\mathrm{C}=\mathrm{C} < \) bond length
3 The dipole moment of aldehydes and ketones lie in the range of \({\rm{2}}{\rm{.3 - 2}}{\rm{.8}}\,\,{\rm{D}}\)
4 The portion of the molecule immediately surrounding the carbonyl group is planar
Explanation:
The bond length of \(>\mathrm{C}=\mathrm{O}\) is \({\rm{1}}{\rm{.2}}\mathop {\rm{A}}\limits^{\rm{o}} \) The bond length of \(>\mathrm{C}=\mathrm{C} < \) is \({\rm{1}}{\rm{.34}}\mathop {\rm{A}}\limits^{\rm{o}} \)
323982
Assertion : In sodium formate, both the C-bonds have same value 1.27 \( \mathop {\rm{A}}^{\circ} \) Reason : Equal bond length is due to the phenomenon of resonance.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sodium formate, with a linear geometry, displays equal C-O bond lengths 1.27 \( \mathop {\rm{A}}^{\circ} \) in the formate ion due to its symmetric structure and even electron density distribution between the identical oxygen atoms. So the option (1) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323983
Assertion : The carbon atom in carbonyl group is \(\mathrm{sp}^{2}\) hybridised. Reason :
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
The bond energy of a carbonyl group is typically around \(179 \mathrm{kcal} / \mathrm{mol}\), whereas in the absence of resonance, it is approximately 145.8 \(\mathrm{kcal} / \mathrm{mol}\). The carbonyl group exhibits resonance, which contributes to its higher bond energy. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323984
The number of \({\mathrm{\alpha-\mathrm{H}}}\) atoms in 2-methylcyclohexanone is ____ .
1 2
2 4
3 3
4 1
Explanation:
There are \(3\alpha - {\text{H}}\)-atoms.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323985
Which of the following statement is not true about \(>\mathrm{C}=\mathrm{O}\) group?
1 The carbon atom of the carbonyl group is \({\rm{s}}{{\rm{p}}^{\rm{2}}}\) hybridised
2 The \(>\mathrm{C}=\mathrm{O}\) bond length is longer than that \(>\mathrm{C}=\mathrm{C} < \) bond length
3 The dipole moment of aldehydes and ketones lie in the range of \({\rm{2}}{\rm{.3 - 2}}{\rm{.8}}\,\,{\rm{D}}\)
4 The portion of the molecule immediately surrounding the carbonyl group is planar
Explanation:
The bond length of \(>\mathrm{C}=\mathrm{O}\) is \({\rm{1}}{\rm{.2}}\mathop {\rm{A}}\limits^{\rm{o}} \) The bond length of \(>\mathrm{C}=\mathrm{C} < \) is \({\rm{1}}{\rm{.34}}\mathop {\rm{A}}\limits^{\rm{o}} \)
323982
Assertion : In sodium formate, both the C-bonds have same value 1.27 \( \mathop {\rm{A}}^{\circ} \) Reason : Equal bond length is due to the phenomenon of resonance.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sodium formate, with a linear geometry, displays equal C-O bond lengths 1.27 \( \mathop {\rm{A}}^{\circ} \) in the formate ion due to its symmetric structure and even electron density distribution between the identical oxygen atoms. So the option (1) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323983
Assertion : The carbon atom in carbonyl group is \(\mathrm{sp}^{2}\) hybridised. Reason :
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
The bond energy of a carbonyl group is typically around \(179 \mathrm{kcal} / \mathrm{mol}\), whereas in the absence of resonance, it is approximately 145.8 \(\mathrm{kcal} / \mathrm{mol}\). The carbonyl group exhibits resonance, which contributes to its higher bond energy. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323984
The number of \({\mathrm{\alpha-\mathrm{H}}}\) atoms in 2-methylcyclohexanone is ____ .
1 2
2 4
3 3
4 1
Explanation:
There are \(3\alpha - {\text{H}}\)-atoms.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323985
Which of the following statement is not true about \(>\mathrm{C}=\mathrm{O}\) group?
1 The carbon atom of the carbonyl group is \({\rm{s}}{{\rm{p}}^{\rm{2}}}\) hybridised
2 The \(>\mathrm{C}=\mathrm{O}\) bond length is longer than that \(>\mathrm{C}=\mathrm{C} < \) bond length
3 The dipole moment of aldehydes and ketones lie in the range of \({\rm{2}}{\rm{.3 - 2}}{\rm{.8}}\,\,{\rm{D}}\)
4 The portion of the molecule immediately surrounding the carbonyl group is planar
Explanation:
The bond length of \(>\mathrm{C}=\mathrm{O}\) is \({\rm{1}}{\rm{.2}}\mathop {\rm{A}}\limits^{\rm{o}} \) The bond length of \(>\mathrm{C}=\mathrm{C} < \) is \({\rm{1}}{\rm{.34}}\mathop {\rm{A}}\limits^{\rm{o}} \)
