231310
What will be the order of reactivity of the following carbonyl compounds with Grignard's reagent?
1 I $>$ II $>$ III $>$ IV
2 IV $>$ III $>$ II $>$ I
3 II $>$ I $>$ IV $>$ III
4 III $>$ II $>$ I $>$ IV
Explanation:
On increasing the number of alkyl group decreases the reactivity of Grignard's reagent. Hence, the order is I \(>\) II \(>\) III \(>\) IV.
VITEEE-2014
GENERAL ORGANIC CHEMISTRY
231311
Which of the following compound is the most basic ?
1
2
3
4
Explanation:
The basicity of an amine is increased by electron donating group and decreased by electron withdrawing group. Aryl amines are less basic than alkyl substituted amines because in aromatic amines some electron density provided by nitrogen atom is distributed throughout the aromatic ring which becomes aryl amines less basic. basicity decreases in the presence of electron donating group. basicity increases in the presence of electron donating group. While in other cases because of resonance, the lone pair of $\mathrm{e}^{-}$present on nitrogen atom gets delocalised over the benzene ring and thus, less easily available for the donation.
VITEEE- 2012
GENERAL ORGANIC CHEMISTRY
231312
Which is more basic oxygen in an ester?
1 Carbonyl oxygen, $\alpha$
2 Carbonyl oxygen, $\beta$
3 Equally basic
4 Both are acidic oxygen
Explanation:
(A) : $\alpha-\mathrm{O}$ oxygen atom can donate lone pair of electron more easily therefore it is more basic then $\beta$ oxygen.
GENERAL ORGANIC CHEMISTRY
231319
Arrange the following in decreasing order of stability.
231310
What will be the order of reactivity of the following carbonyl compounds with Grignard's reagent?
1 I $>$ II $>$ III $>$ IV
2 IV $>$ III $>$ II $>$ I
3 II $>$ I $>$ IV $>$ III
4 III $>$ II $>$ I $>$ IV
Explanation:
On increasing the number of alkyl group decreases the reactivity of Grignard's reagent. Hence, the order is I \(>\) II \(>\) III \(>\) IV.
VITEEE-2014
GENERAL ORGANIC CHEMISTRY
231311
Which of the following compound is the most basic ?
1
2
3
4
Explanation:
The basicity of an amine is increased by electron donating group and decreased by electron withdrawing group. Aryl amines are less basic than alkyl substituted amines because in aromatic amines some electron density provided by nitrogen atom is distributed throughout the aromatic ring which becomes aryl amines less basic. basicity decreases in the presence of electron donating group. basicity increases in the presence of electron donating group. While in other cases because of resonance, the lone pair of $\mathrm{e}^{-}$present on nitrogen atom gets delocalised over the benzene ring and thus, less easily available for the donation.
VITEEE- 2012
GENERAL ORGANIC CHEMISTRY
231312
Which is more basic oxygen in an ester?
1 Carbonyl oxygen, $\alpha$
2 Carbonyl oxygen, $\beta$
3 Equally basic
4 Both are acidic oxygen
Explanation:
(A) : $\alpha-\mathrm{O}$ oxygen atom can donate lone pair of electron more easily therefore it is more basic then $\beta$ oxygen.
GENERAL ORGANIC CHEMISTRY
231319
Arrange the following in decreasing order of stability.
NEET Test Series from KOTA - 10 Papers In MS WORD
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GENERAL ORGANIC CHEMISTRY
231310
What will be the order of reactivity of the following carbonyl compounds with Grignard's reagent?
1 I $>$ II $>$ III $>$ IV
2 IV $>$ III $>$ II $>$ I
3 II $>$ I $>$ IV $>$ III
4 III $>$ II $>$ I $>$ IV
Explanation:
On increasing the number of alkyl group decreases the reactivity of Grignard's reagent. Hence, the order is I \(>\) II \(>\) III \(>\) IV.
VITEEE-2014
GENERAL ORGANIC CHEMISTRY
231311
Which of the following compound is the most basic ?
1
2
3
4
Explanation:
The basicity of an amine is increased by electron donating group and decreased by electron withdrawing group. Aryl amines are less basic than alkyl substituted amines because in aromatic amines some electron density provided by nitrogen atom is distributed throughout the aromatic ring which becomes aryl amines less basic. basicity decreases in the presence of electron donating group. basicity increases in the presence of electron donating group. While in other cases because of resonance, the lone pair of $\mathrm{e}^{-}$present on nitrogen atom gets delocalised over the benzene ring and thus, less easily available for the donation.
VITEEE- 2012
GENERAL ORGANIC CHEMISTRY
231312
Which is more basic oxygen in an ester?
1 Carbonyl oxygen, $\alpha$
2 Carbonyl oxygen, $\beta$
3 Equally basic
4 Both are acidic oxygen
Explanation:
(A) : $\alpha-\mathrm{O}$ oxygen atom can donate lone pair of electron more easily therefore it is more basic then $\beta$ oxygen.
GENERAL ORGANIC CHEMISTRY
231319
Arrange the following in decreasing order of stability.
231310
What will be the order of reactivity of the following carbonyl compounds with Grignard's reagent?
1 I $>$ II $>$ III $>$ IV
2 IV $>$ III $>$ II $>$ I
3 II $>$ I $>$ IV $>$ III
4 III $>$ II $>$ I $>$ IV
Explanation:
On increasing the number of alkyl group decreases the reactivity of Grignard's reagent. Hence, the order is I \(>\) II \(>\) III \(>\) IV.
VITEEE-2014
GENERAL ORGANIC CHEMISTRY
231311
Which of the following compound is the most basic ?
1
2
3
4
Explanation:
The basicity of an amine is increased by electron donating group and decreased by electron withdrawing group. Aryl amines are less basic than alkyl substituted amines because in aromatic amines some electron density provided by nitrogen atom is distributed throughout the aromatic ring which becomes aryl amines less basic. basicity decreases in the presence of electron donating group. basicity increases in the presence of electron donating group. While in other cases because of resonance, the lone pair of $\mathrm{e}^{-}$present on nitrogen atom gets delocalised over the benzene ring and thus, less easily available for the donation.
VITEEE- 2012
GENERAL ORGANIC CHEMISTRY
231312
Which is more basic oxygen in an ester?
1 Carbonyl oxygen, $\alpha$
2 Carbonyl oxygen, $\beta$
3 Equally basic
4 Both are acidic oxygen
Explanation:
(A) : $\alpha-\mathrm{O}$ oxygen atom can donate lone pair of electron more easily therefore it is more basic then $\beta$ oxygen.
GENERAL ORGANIC CHEMISTRY
231319
Arrange the following in decreasing order of stability.
