1
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Ammonia (NH3) obtained from different sources always has same proportion of nitrogen and hydrogen. It proves the validity the law of
A
reciprocal proportion
B
constant proportion
C
multiple proportions
D
None of the above
2
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Boric acid is an acid because its molecule
A
accepts OH$$-$$ from water releasing proton
B
combines with proton from water molecule
C
contains replaceable H+ ion
D
gives up a proton
3
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The main constituent of vinegar is
A
acetic acid
B
ascorbic acid
C
citric acid
D
tartaric acid
4
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
White phosphorus glows in the dark due to
A
amorphous character
B
slow oxidation
C
high ignition temperature
D
good conducting property of electricity
Questions Asked from Marks 2.5