The enolic form of ethyl accetoacetate as shown below has
A
9 sigma bonds and 2 pi-bonds
B
9 sigma bonds and 1 pi-bond
C
18 sigma bonds and 2 pi-bonds
D
16 sigma bonds and 1 pi-bond.
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
The total number of $$\pi $$-bond electrons in the following structure is
A
12
B
16
C
4
D
8
3
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
In Duma's method for estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension at 300 K is 25 mm, the percentage of nitrogen in the compound is
A
16.75
B
15.76
C
17.36
D
18.20
4
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Which of the following is the most correct electron displacement for a nucleophilic reaction to take place?
