231308
Among the following the most stable compound is:
1 cis-1,2-cyclohexanediol
2 trans-1,2-cyclohexanediol
3 cis-1,3-cyclohexanediol
4 trans-1,3-cyclohexanediol
Explanation:
(D): Trans configuration is more stable than cis configuration because in cis-configuration the $\mathrm{H}$ groups are thrown closely enough together to cause crowding or repulsion. Again between 1,2-and 1,3-configuration, in $1-3$, the $\mathrm{OH}$ groups are placed further apart to minimize the repulsion. Hence, more stable is 1,3configuration.
AIIMS-2005
GENERAL ORGANIC CHEMISTRY
231313
Which of the following species is not electrophilic in nature?
1 $\stackrel{\oplus}{\mathrm{C}} \mathrm{l}$
2 $\mathrm{BH}_{3}$
3 $\mathrm{H}_{3} \stackrel{\oplus}{\mathrm{O}}$
4 $\stackrel{\oplus}{\mathrm{N}} \mathrm{O}_{2}$
Explanation:
Electron deficient species are known as electrophiles. Electrophones are electron deficient species. Among the given, $\mathrm{H}_{3} \mathrm{O}^{\oplus}$ has lone pair of electrons for donation, so it is not electron deficient and hence, not an electrophile.
VITEEE- 2012
GENERAL ORGANIC CHEMISTRY
231315
Phenol is less acidic than
1 p-chlorophenol
2 p-nitrophenol
3 p-methoxyphenol
4 ethanol
Explanation:
$\mathrm{p}$ nitrophenol makes it more acidic than phenol. Phenols are much more acidic than alcohols.
IIT JEE-1986
GENERAL ORGANIC CHEMISTRY
231327
The correct arrangement of following in their decreasing order of basic strength is
Higher the order of $+\mathrm{I}$ effect, higher is the basicity of N-containing compound and resonance decrease the basicity. Hence the order of basicity is $\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{2} \mathrm{NH}>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}>\mathrm{NH}_{3}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}$
NEET Test Series from KOTA - 10 Papers In MS WORD
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GENERAL ORGANIC CHEMISTRY
231308
Among the following the most stable compound is:
1 cis-1,2-cyclohexanediol
2 trans-1,2-cyclohexanediol
3 cis-1,3-cyclohexanediol
4 trans-1,3-cyclohexanediol
Explanation:
(D): Trans configuration is more stable than cis configuration because in cis-configuration the $\mathrm{H}$ groups are thrown closely enough together to cause crowding or repulsion. Again between 1,2-and 1,3-configuration, in $1-3$, the $\mathrm{OH}$ groups are placed further apart to minimize the repulsion. Hence, more stable is 1,3configuration.
AIIMS-2005
GENERAL ORGANIC CHEMISTRY
231313
Which of the following species is not electrophilic in nature?
1 $\stackrel{\oplus}{\mathrm{C}} \mathrm{l}$
2 $\mathrm{BH}_{3}$
3 $\mathrm{H}_{3} \stackrel{\oplus}{\mathrm{O}}$
4 $\stackrel{\oplus}{\mathrm{N}} \mathrm{O}_{2}$
Explanation:
Electron deficient species are known as electrophiles. Electrophones are electron deficient species. Among the given, $\mathrm{H}_{3} \mathrm{O}^{\oplus}$ has lone pair of electrons for donation, so it is not electron deficient and hence, not an electrophile.
VITEEE- 2012
GENERAL ORGANIC CHEMISTRY
231315
Phenol is less acidic than
1 p-chlorophenol
2 p-nitrophenol
3 p-methoxyphenol
4 ethanol
Explanation:
$\mathrm{p}$ nitrophenol makes it more acidic than phenol. Phenols are much more acidic than alcohols.
IIT JEE-1986
GENERAL ORGANIC CHEMISTRY
231327
The correct arrangement of following in their decreasing order of basic strength is
Higher the order of $+\mathrm{I}$ effect, higher is the basicity of N-containing compound and resonance decrease the basicity. Hence the order of basicity is $\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{2} \mathrm{NH}>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}>\mathrm{NH}_{3}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}$
231308
Among the following the most stable compound is:
1 cis-1,2-cyclohexanediol
2 trans-1,2-cyclohexanediol
3 cis-1,3-cyclohexanediol
4 trans-1,3-cyclohexanediol
Explanation:
(D): Trans configuration is more stable than cis configuration because in cis-configuration the $\mathrm{H}$ groups are thrown closely enough together to cause crowding or repulsion. Again between 1,2-and 1,3-configuration, in $1-3$, the $\mathrm{OH}$ groups are placed further apart to minimize the repulsion. Hence, more stable is 1,3configuration.
AIIMS-2005
GENERAL ORGANIC CHEMISTRY
231313
Which of the following species is not electrophilic in nature?
1 $\stackrel{\oplus}{\mathrm{C}} \mathrm{l}$
2 $\mathrm{BH}_{3}$
3 $\mathrm{H}_{3} \stackrel{\oplus}{\mathrm{O}}$
4 $\stackrel{\oplus}{\mathrm{N}} \mathrm{O}_{2}$
Explanation:
Electron deficient species are known as electrophiles. Electrophones are electron deficient species. Among the given, $\mathrm{H}_{3} \mathrm{O}^{\oplus}$ has lone pair of electrons for donation, so it is not electron deficient and hence, not an electrophile.
VITEEE- 2012
GENERAL ORGANIC CHEMISTRY
231315
Phenol is less acidic than
1 p-chlorophenol
2 p-nitrophenol
3 p-methoxyphenol
4 ethanol
Explanation:
$\mathrm{p}$ nitrophenol makes it more acidic than phenol. Phenols are much more acidic than alcohols.
IIT JEE-1986
GENERAL ORGANIC CHEMISTRY
231327
The correct arrangement of following in their decreasing order of basic strength is
Higher the order of $+\mathrm{I}$ effect, higher is the basicity of N-containing compound and resonance decrease the basicity. Hence the order of basicity is $\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{2} \mathrm{NH}>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}>\mathrm{NH}_{3}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}$
231308
Among the following the most stable compound is:
1 cis-1,2-cyclohexanediol
2 trans-1,2-cyclohexanediol
3 cis-1,3-cyclohexanediol
4 trans-1,3-cyclohexanediol
Explanation:
(D): Trans configuration is more stable than cis configuration because in cis-configuration the $\mathrm{H}$ groups are thrown closely enough together to cause crowding or repulsion. Again between 1,2-and 1,3-configuration, in $1-3$, the $\mathrm{OH}$ groups are placed further apart to minimize the repulsion. Hence, more stable is 1,3configuration.
AIIMS-2005
GENERAL ORGANIC CHEMISTRY
231313
Which of the following species is not electrophilic in nature?
1 $\stackrel{\oplus}{\mathrm{C}} \mathrm{l}$
2 $\mathrm{BH}_{3}$
3 $\mathrm{H}_{3} \stackrel{\oplus}{\mathrm{O}}$
4 $\stackrel{\oplus}{\mathrm{N}} \mathrm{O}_{2}$
Explanation:
Electron deficient species are known as electrophiles. Electrophones are electron deficient species. Among the given, $\mathrm{H}_{3} \mathrm{O}^{\oplus}$ has lone pair of electrons for donation, so it is not electron deficient and hence, not an electrophile.
VITEEE- 2012
GENERAL ORGANIC CHEMISTRY
231315
Phenol is less acidic than
1 p-chlorophenol
2 p-nitrophenol
3 p-methoxyphenol
4 ethanol
Explanation:
$\mathrm{p}$ nitrophenol makes it more acidic than phenol. Phenols are much more acidic than alcohols.
IIT JEE-1986
GENERAL ORGANIC CHEMISTRY
231327
The correct arrangement of following in their decreasing order of basic strength is
Higher the order of $+\mathrm{I}$ effect, higher is the basicity of N-containing compound and resonance decrease the basicity. Hence the order of basicity is $\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{2} \mathrm{NH}>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}>\mathrm{NH}_{3}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}$