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
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Given :
The enthalpy of hydrogenation of these compounds will be in the order as
A
II > III > I
B
II > I > III
C
I > II > III
D
III > II > I
3
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
A single compound of the structure,
is obtainable from ozonolysis of which of the following cyclic compounds?
A
B
C
D
4
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Two identical thin plano-convex glass lenses (refractive index 1.5) each having radius of curvature of 20 cm are placed with their convex surfaces in contact at the centre. The intervening space is filled with oil of refractive index 1.7. The focal length of the combination is