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1
NDA General Ability 18 April 2021
MCQ (Single Correct Answer)
+4
-1.33
Which one of the following regarding density of water at atmospheric pressure is correct?
A
Density of water at 4°C is 1000 kg/m3.
B
Density of water at 0°C is 1000 kg/m3.
C
Density of water at 0°C is 100 kg/m3.
D
Density of water at 4°C is 10 kg/m3.
2
NDA General Ability 18 April 2021
MCQ (Single Correct Answer)
+4
-1.33

Which of the following pairs of physical phenomenon and the discover is/are correctly matched?

 1. James Chadwick  Photoelectric
 2. Albert Einstein  Neutron
 3. Marie Curie  Radium
Select the correct answer using the code given below:
A
1, 2 and 3
B
1 and 2 only
C
2 and 3 only
D
3 only
3
NDA General Ability 18 April 2021
MCQ (Single Correct Answer)
+4
-1.33
The statement "friction force is a contact force while magnetic force is a non-contact force" is
A
always true.
B
true only at 0°C.
C
a false statement.
D
either true or false depending upon the temperature of the surroundings.
4
NDA General Ability 18 April 2021
MCQ (Single Correct Answer)
+4
-1.33
The composition of gases in exosphere is
A
Helium and Hydrogen.
B
Neon and Oxygen.
C
Neon and Hydrogen.
D
Helium and Neon.
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