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1
JEE Main 2014 (Offline)
MCQ (Single Correct Answer)
+4
-1
For the estimation of nitrogen, 1.4 g of organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20 ml of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is:
A
3%
B
5%
C
6%
D
10%
2
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
A solution of (–$$l$$) – chloro –1 – phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5, due to the formation of :
A
carbene
B
carbocation
C
free radical
D
carbanion
3
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
The order of stability of the following carbocations :

JEE Main 2013 (Offline) Chemistry - Basics of Organic Chemistry Question 131 English
A
$${\rm I}{\rm I}{\rm I} > {\rm I}{\rm I} > {\rm I}$$
B
$${\rm I}{\rm I} > {\rm I}{\rm I}{\rm I} > {\rm I}$$
C
$${\rm I} > {\rm I}{\rm I} > {\rm I}{\rm I}{\rm I}$$
D
$${\rm I}{\rm I}{\rm I} > {\rm I} > {\rm I}{\rm I}$$
4
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
Identify the compound that exhibits tautomerism.
A
Lactic acid
B
2-Pentanone
C
Pheno
D
2- Butene
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