1
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
2
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
3
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
4
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Which of the following are the properties of an electron?

1. Electron is a constituent of cathode ray.

2. Electron is a negatively charged particle.

3. The mass of the electron is equal to the mass of the proton.

4. Electron is deflected by the electric field but not by magnetic field.

Select the correct answer using the codes given below.
A
1 and 2
B
1, 2 and 3
C
3 and 4
D
1 and 4
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