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1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Arrange the following in increasing order of stability
NEET 2013 (Karnataka) Chemistry - Some Basic Concepts of Organic Chemistry Question 81 English
A
5 < 4 < 3 < 1< 2
B
4 < 5 < 3 < 1 < 2
C
1 < 5 < 4 < 3 < 2
D
5 < 4 < 3 < 2 < 1
2
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Homolytic fission of the following alkanes forms free radicals CH3 $$-$$ CH3, CH3 $$-$$ CH2 $$-$$ CH3, (CH3)2CH $$-$$ CH3, CH3 $$-$$ CH2 $$-$$CH(CH3)2.
Increasing order of stability of the radicals is
A
$$\eqalign{ & {\left( {C{H_3}} \right)_2}\mathop C\limits^ \bullet \, - \,C{H_2}C{H_3}\, < C{H_3}\, - \,\mathop C\limits^ \bullet H - \,C{H_3} \cr & < C{H_3}\, - \,\mathop C\limits^ \bullet {H_2}\, < {\left( {C{H_3}} \right)_3}\mathop C\limits^ \bullet \cr} $$
B
$$\eqalign{ & C{H_3}\, - \,\mathop C\limits^ \bullet {H_2}\, < \,C{H_3}\, - \,\mathop C\limits^ \bullet HH\, - \,C{H_3}\, < \cr & {\left( {C{H_3}} \right)_2}\mathop C\limits^ \bullet \, - \,C{H_2}\, - \,C{H_3}\, < \,{\left( {C{H_3}} \right)_3}\mathop C\limits^ \bullet \cr} $$
C
$$\eqalign{ & C{H_3} - \mathop C\limits^ \bullet {H_2} < C{H_3} - \mathop C\limits^ \bullet H - C{H_3} < \cr & {\left( {C{H_3}} \right)_3}\mathop C\limits^ \bullet \, < {\left( {C{H_3}} \right)_2}\mathop C\limits^ \bullet \, - C{H_2}C{H_3} \cr} $$
D
$$\eqalign{ & {\left( {C{H_3}} \right)_3}\mathop C\limits^ \bullet \, < {\left( {C{H_3}} \right)_2}\mathop C\limits^ \bullet \, - C{H_2}C{H_3} < \cr & C{H_3} - \mathop C\limits^ \bullet H - C{H_3} < C{H_3} - \mathop C\limits^ \bullet {H_2} \cr} $$
3
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Given :
NEET 2013 (Karnataka) Chemistry - Some Basic Concepts of Organic Chemistry Question 42 English
I and II are
A
identical
B
a pair of conformers
C
a pair of geometrical isomers
D
a pair of optical isomers
4
NEET 2013
MCQ (Single Correct Answer)
+4
-1
The radical,
NEET 2013 Chemistry - Some Basic Concepts of Organic Chemistry Question 85 English
is aromatic because it has
A
7 p-orbitals and 7 unpaired electrons
B
6 p-orbitals and 7 unpaired electrons
C
6 p-orbitals and 6 unpaired electrons
D
7 p-orbitals and 6 unpaired electrons.
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