4. Isomerism
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GENERAL ORGANIC CHEMISTRY

232056 Which of the following Statements are correct?
1.$0.90 \mathrm{~g}$ butane diol gives $224 \mathrm{mLH}_{2}$ at $\mathrm{STP}$ when reacts with $\mathrm{Na}$.
2.Optically active 2- iodobutane reacts with $\mathrm{NaI}$ to form racemic mixture.
3.2-methyl butane is optically active.
4.$\mathrm{C}_{4} \mathrm{H}_{8}$ shows 7- isomer.

1 2,3
2 2,4
3 1,2
4 1,3
CG PET -2018
GENERAL ORGANIC CHEMISTRY

232062 Increasing order of reactivity of the following compounds for $\mathrm{S}_{\mathrm{N}} 1$ substitution is:
original image

1 \((\) A \()<\) (B) \(<\) (D) \(<\) (C)
2 (B) \(<\) (C) \(<\) (D) \(<\) (A)
3 \(B\)<(\) A \()<\) (D) \(<\) (C)
4 (B) \(<\) (C) \(<\) (A) \(<\) (D)
JEE Main-2019
GENERAL ORGANIC CHEMISTRY

232066 In the following skew conformation of ethane, $\mathrm{H}^{\prime}-\mathrm{C}-\mathrm{C}-\mathrm{H}^{\prime \prime}$ dihedral angle is:
original image

1 $58^{\circ}$
2 $149^{\circ}$
3 $151^{\circ}$
4 $120^{\circ}$
JEE Main-2019
GENERAL ORGANIC CHEMISTRY

232068 Identify the compund that exhibits tautomerism

1 2- Butene -
original image
There should no transfer of proton so it does not show tautomerism.
2 Lactic acid
original image
Equivalent resonance on 2 oxygen atom of acetic acid so no tautomerism.
3 2-pentanone
original image
4 Phenol
original image
So, option (c) show tautomerism.
AIEEE 2011
NEET DIGITAL LIBRARY
GENERAL ORGANIC CHEMISTRY

232056 Which of the following Statements are correct?
1.$0.90 \mathrm{~g}$ butane diol gives $224 \mathrm{mLH}_{2}$ at $\mathrm{STP}$ when reacts with $\mathrm{Na}$.
2.Optically active 2- iodobutane reacts with $\mathrm{NaI}$ to form racemic mixture.
3.2-methyl butane is optically active.
4.$\mathrm{C}_{4} \mathrm{H}_{8}$ shows 7- isomer.

1 2,3
2 2,4
3 1,2
4 1,3
CG PET -2018
GENERAL ORGANIC CHEMISTRY

232062 Increasing order of reactivity of the following compounds for $\mathrm{S}_{\mathrm{N}} 1$ substitution is:
original image

1 \((\) A \()<\) (B) \(<\) (D) \(<\) (C)
2 (B) \(<\) (C) \(<\) (D) \(<\) (A)
3 \(B\)<(\) A \()<\) (D) \(<\) (C)
4 (B) \(<\) (C) \(<\) (A) \(<\) (D)
JEE Main-2019
GENERAL ORGANIC CHEMISTRY

232066 In the following skew conformation of ethane, $\mathrm{H}^{\prime}-\mathrm{C}-\mathrm{C}-\mathrm{H}^{\prime \prime}$ dihedral angle is:
original image

1 $58^{\circ}$
2 $149^{\circ}$
3 $151^{\circ}$
4 $120^{\circ}$
JEE Main-2019
GENERAL ORGANIC CHEMISTRY

232068 Identify the compund that exhibits tautomerism

1 2- Butene -
original image
There should no transfer of proton so it does not show tautomerism.
2 Lactic acid
original image
Equivalent resonance on 2 oxygen atom of acetic acid so no tautomerism.
3 2-pentanone
original image
4 Phenol
original image
So, option (c) show tautomerism.
AIEEE 2011
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GENERAL ORGANIC CHEMISTRY

232056 Which of the following Statements are correct?
1.$0.90 \mathrm{~g}$ butane diol gives $224 \mathrm{mLH}_{2}$ at $\mathrm{STP}$ when reacts with $\mathrm{Na}$.
2.Optically active 2- iodobutane reacts with $\mathrm{NaI}$ to form racemic mixture.
3.2-methyl butane is optically active.
4.$\mathrm{C}_{4} \mathrm{H}_{8}$ shows 7- isomer.

1 2,3
2 2,4
3 1,2
4 1,3
CG PET -2018
GENERAL ORGANIC CHEMISTRY

232062 Increasing order of reactivity of the following compounds for $\mathrm{S}_{\mathrm{N}} 1$ substitution is:
original image

1 \((\) A \()<\) (B) \(<\) (D) \(<\) (C)
2 (B) \(<\) (C) \(<\) (D) \(<\) (A)
3 \(B\)<(\) A \()<\) (D) \(<\) (C)
4 (B) \(<\) (C) \(<\) (A) \(<\) (D)
JEE Main-2019
GENERAL ORGANIC CHEMISTRY

232066 In the following skew conformation of ethane, $\mathrm{H}^{\prime}-\mathrm{C}-\mathrm{C}-\mathrm{H}^{\prime \prime}$ dihedral angle is:
original image

1 $58^{\circ}$
2 $149^{\circ}$
3 $151^{\circ}$
4 $120^{\circ}$
JEE Main-2019
GENERAL ORGANIC CHEMISTRY

232068 Identify the compund that exhibits tautomerism

1 2- Butene -
original image
There should no transfer of proton so it does not show tautomerism.
2 Lactic acid
original image
Equivalent resonance on 2 oxygen atom of acetic acid so no tautomerism.
3 2-pentanone
original image
4 Phenol
original image
So, option (c) show tautomerism.
AIEEE 2011
For More Updates join with Us
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GENERAL ORGANIC CHEMISTRY

232056 Which of the following Statements are correct?
1.$0.90 \mathrm{~g}$ butane diol gives $224 \mathrm{mLH}_{2}$ at $\mathrm{STP}$ when reacts with $\mathrm{Na}$.
2.Optically active 2- iodobutane reacts with $\mathrm{NaI}$ to form racemic mixture.
3.2-methyl butane is optically active.
4.$\mathrm{C}_{4} \mathrm{H}_{8}$ shows 7- isomer.

1 2,3
2 2,4
3 1,2
4 1,3
CG PET -2018
GENERAL ORGANIC CHEMISTRY

232062 Increasing order of reactivity of the following compounds for $\mathrm{S}_{\mathrm{N}} 1$ substitution is:
original image

1 \((\) A \()<\) (B) \(<\) (D) \(<\) (C)
2 (B) \(<\) (C) \(<\) (D) \(<\) (A)
3 \(B\)<(\) A \()<\) (D) \(<\) (C)
4 (B) \(<\) (C) \(<\) (A) \(<\) (D)
JEE Main-2019
GENERAL ORGANIC CHEMISTRY

232066 In the following skew conformation of ethane, $\mathrm{H}^{\prime}-\mathrm{C}-\mathrm{C}-\mathrm{H}^{\prime \prime}$ dihedral angle is:
original image

1 $58^{\circ}$
2 $149^{\circ}$
3 $151^{\circ}$
4 $120^{\circ}$
JEE Main-2019
GENERAL ORGANIC CHEMISTRY

232068 Identify the compund that exhibits tautomerism

1 2- Butene -
original image
There should no transfer of proton so it does not show tautomerism.
2 Lactic acid
original image
Equivalent resonance on 2 oxygen atom of acetic acid so no tautomerism.
3 2-pentanone
original image
4 Phenol
original image
So, option (c) show tautomerism.
AIEEE 2011
NEET DIGITAL LIBRARY