1 $10 \sigma$-bonds, $2 \pi$-bonds and 1 lone pair
2 $9 \sigma$-bonds, $2 \pi$-bonds and 2 lone pair
3 $8 \sigma$-bonds, $2 \pi$-bonds and 2 lone pair
4 $9 \sigma$-bonds, $1 \pi$-bonds and 2 lone pair
Explanation:
(D) : $9 \sigma$-bond, $1 \pi$-bond, 2-lone pair
BCECE-2015
GENERAL ORGANIC CHEMISTRY
231523
An organic compound $X$ on treatment with PCC in dichloromethane gives the compound $Y$. Compound $Y$ reacts with $I_{2}$ and alkali to form yellow precipitate of triiodomethane. The compound $X$ is
1 $\mathrm{CH}_{3} \mathrm{CHO}$
2 $\mathrm{CH}_{3} \mathrm{COCH}_{3}$
3 $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$
4 $\mathrm{CH}_{3} \mathrm{COOH}$
Explanation:
Alcohol reacts with weak oxidising agent (PCC) to form the aldehyde or Ketone. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}+\mathrm{PCC} \stackrel{\mathrm{CH}_{2} \mathrm{CH}_{2}}{\longrightarrow} \mathrm{CH}_{3}-\mathrm{CHO} \underset{\mathrm{NaOH}}{\stackrel{\mathrm{I}_{2}}{\longrightarrow}} \mathrm{CHI}_{3}+\mathrm{HCOO}^{-} \mathrm{Na}^{+}$
Karnataka CET-2021
GENERAL ORGANIC CHEMISTRY
231524
Which of the following compound is amphoteric in nature?
1
2 $\mathrm{CH}_{3} \mathrm{COOH}$
3
4 $\mathrm{CH}_{3} \mathrm{CONH}_{2}$
Explanation:
Exp : (C) :
BCECE-2016
GENERAL ORGANIC CHEMISTRY
231527
Arrange benzene, n-hexane and ethyne in decreasing order of their acidic behavior
1 benzene $>$ n-hexane $>$ ethyne
2 n-hexane $>$ Benzene $>$ ethyne
3 ethyne $>$ n-hexane $>$ benzene
4 ethyne $>$ benzene $>$ n-hexane
Explanation:
The given compounds are benzene, n-hexane and ethyne i.e. As we know that, percentage of s-character is directly proportional to the electronegativity of corresponding atom. Ethyne has more \% of s-character due to which share pair electron withdrawing by carbon atom and partial positive charge generated on hydrogen atom. So, ethyne has more acidic character than benzene and nhexane respectively. Hence, the correct order is : ethyne $>$ Benzene $>$ n-hexane.
1 $10 \sigma$-bonds, $2 \pi$-bonds and 1 lone pair
2 $9 \sigma$-bonds, $2 \pi$-bonds and 2 lone pair
3 $8 \sigma$-bonds, $2 \pi$-bonds and 2 lone pair
4 $9 \sigma$-bonds, $1 \pi$-bonds and 2 lone pair
Explanation:
(D) : $9 \sigma$-bond, $1 \pi$-bond, 2-lone pair
BCECE-2015
GENERAL ORGANIC CHEMISTRY
231523
An organic compound $X$ on treatment with PCC in dichloromethane gives the compound $Y$. Compound $Y$ reacts with $I_{2}$ and alkali to form yellow precipitate of triiodomethane. The compound $X$ is
1 $\mathrm{CH}_{3} \mathrm{CHO}$
2 $\mathrm{CH}_{3} \mathrm{COCH}_{3}$
3 $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$
4 $\mathrm{CH}_{3} \mathrm{COOH}$
Explanation:
Alcohol reacts with weak oxidising agent (PCC) to form the aldehyde or Ketone. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}+\mathrm{PCC} \stackrel{\mathrm{CH}_{2} \mathrm{CH}_{2}}{\longrightarrow} \mathrm{CH}_{3}-\mathrm{CHO} \underset{\mathrm{NaOH}}{\stackrel{\mathrm{I}_{2}}{\longrightarrow}} \mathrm{CHI}_{3}+\mathrm{HCOO}^{-} \mathrm{Na}^{+}$
Karnataka CET-2021
GENERAL ORGANIC CHEMISTRY
231524
Which of the following compound is amphoteric in nature?
1
2 $\mathrm{CH}_{3} \mathrm{COOH}$
3
4 $\mathrm{CH}_{3} \mathrm{CONH}_{2}$
Explanation:
Exp : (C) :
BCECE-2016
GENERAL ORGANIC CHEMISTRY
231527
Arrange benzene, n-hexane and ethyne in decreasing order of their acidic behavior
1 benzene $>$ n-hexane $>$ ethyne
2 n-hexane $>$ Benzene $>$ ethyne
3 ethyne $>$ n-hexane $>$ benzene
4 ethyne $>$ benzene $>$ n-hexane
Explanation:
The given compounds are benzene, n-hexane and ethyne i.e. As we know that, percentage of s-character is directly proportional to the electronegativity of corresponding atom. Ethyne has more \% of s-character due to which share pair electron withdrawing by carbon atom and partial positive charge generated on hydrogen atom. So, ethyne has more acidic character than benzene and nhexane respectively. Hence, the correct order is : ethyne $>$ Benzene $>$ n-hexane.
NEET Test Series from KOTA - 10 Papers In MS WORD
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GENERAL ORGANIC CHEMISTRY
231521
The enolic form of acetone contains-
1 $10 \sigma$-bonds, $2 \pi$-bonds and 1 lone pair
2 $9 \sigma$-bonds, $2 \pi$-bonds and 2 lone pair
3 $8 \sigma$-bonds, $2 \pi$-bonds and 2 lone pair
4 $9 \sigma$-bonds, $1 \pi$-bonds and 2 lone pair
Explanation:
(D) : $9 \sigma$-bond, $1 \pi$-bond, 2-lone pair
BCECE-2015
GENERAL ORGANIC CHEMISTRY
231523
An organic compound $X$ on treatment with PCC in dichloromethane gives the compound $Y$. Compound $Y$ reacts with $I_{2}$ and alkali to form yellow precipitate of triiodomethane. The compound $X$ is
1 $\mathrm{CH}_{3} \mathrm{CHO}$
2 $\mathrm{CH}_{3} \mathrm{COCH}_{3}$
3 $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$
4 $\mathrm{CH}_{3} \mathrm{COOH}$
Explanation:
Alcohol reacts with weak oxidising agent (PCC) to form the aldehyde or Ketone. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}+\mathrm{PCC} \stackrel{\mathrm{CH}_{2} \mathrm{CH}_{2}}{\longrightarrow} \mathrm{CH}_{3}-\mathrm{CHO} \underset{\mathrm{NaOH}}{\stackrel{\mathrm{I}_{2}}{\longrightarrow}} \mathrm{CHI}_{3}+\mathrm{HCOO}^{-} \mathrm{Na}^{+}$
Karnataka CET-2021
GENERAL ORGANIC CHEMISTRY
231524
Which of the following compound is amphoteric in nature?
1
2 $\mathrm{CH}_{3} \mathrm{COOH}$
3
4 $\mathrm{CH}_{3} \mathrm{CONH}_{2}$
Explanation:
Exp : (C) :
BCECE-2016
GENERAL ORGANIC CHEMISTRY
231527
Arrange benzene, n-hexane and ethyne in decreasing order of their acidic behavior
1 benzene $>$ n-hexane $>$ ethyne
2 n-hexane $>$ Benzene $>$ ethyne
3 ethyne $>$ n-hexane $>$ benzene
4 ethyne $>$ benzene $>$ n-hexane
Explanation:
The given compounds are benzene, n-hexane and ethyne i.e. As we know that, percentage of s-character is directly proportional to the electronegativity of corresponding atom. Ethyne has more \% of s-character due to which share pair electron withdrawing by carbon atom and partial positive charge generated on hydrogen atom. So, ethyne has more acidic character than benzene and nhexane respectively. Hence, the correct order is : ethyne $>$ Benzene $>$ n-hexane.
1 $10 \sigma$-bonds, $2 \pi$-bonds and 1 lone pair
2 $9 \sigma$-bonds, $2 \pi$-bonds and 2 lone pair
3 $8 \sigma$-bonds, $2 \pi$-bonds and 2 lone pair
4 $9 \sigma$-bonds, $1 \pi$-bonds and 2 lone pair
Explanation:
(D) : $9 \sigma$-bond, $1 \pi$-bond, 2-lone pair
BCECE-2015
GENERAL ORGANIC CHEMISTRY
231523
An organic compound $X$ on treatment with PCC in dichloromethane gives the compound $Y$. Compound $Y$ reacts with $I_{2}$ and alkali to form yellow precipitate of triiodomethane. The compound $X$ is
1 $\mathrm{CH}_{3} \mathrm{CHO}$
2 $\mathrm{CH}_{3} \mathrm{COCH}_{3}$
3 $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$
4 $\mathrm{CH}_{3} \mathrm{COOH}$
Explanation:
Alcohol reacts with weak oxidising agent (PCC) to form the aldehyde or Ketone. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}+\mathrm{PCC} \stackrel{\mathrm{CH}_{2} \mathrm{CH}_{2}}{\longrightarrow} \mathrm{CH}_{3}-\mathrm{CHO} \underset{\mathrm{NaOH}}{\stackrel{\mathrm{I}_{2}}{\longrightarrow}} \mathrm{CHI}_{3}+\mathrm{HCOO}^{-} \mathrm{Na}^{+}$
Karnataka CET-2021
GENERAL ORGANIC CHEMISTRY
231524
Which of the following compound is amphoteric in nature?
1
2 $\mathrm{CH}_{3} \mathrm{COOH}$
3
4 $\mathrm{CH}_{3} \mathrm{CONH}_{2}$
Explanation:
Exp : (C) :
BCECE-2016
GENERAL ORGANIC CHEMISTRY
231527
Arrange benzene, n-hexane and ethyne in decreasing order of their acidic behavior
1 benzene $>$ n-hexane $>$ ethyne
2 n-hexane $>$ Benzene $>$ ethyne
3 ethyne $>$ n-hexane $>$ benzene
4 ethyne $>$ benzene $>$ n-hexane
Explanation:
The given compounds are benzene, n-hexane and ethyne i.e. As we know that, percentage of s-character is directly proportional to the electronegativity of corresponding atom. Ethyne has more \% of s-character due to which share pair electron withdrawing by carbon atom and partial positive charge generated on hydrogen atom. So, ethyne has more acidic character than benzene and nhexane respectively. Hence, the correct order is : ethyne $>$ Benzene $>$ n-hexane.
