1
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following elements corrodes rapidly?
A
Aluminium
B
Iron
C
Zinc
D
Silver
2
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
20 g of common salt is dissolved in 180g of water. What is the mass percentage of the salt in the solution?
A
5%
B
9%
C
10%
D
15%
3
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The valency of an element depends upon the
A
total number of protons in an atom
B
mass number of an atom
C
total number of neutrons in an atom
D
total number of electrons in the outermost shell of an atom
4
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Match List I with List II and select the correct answer using the code given below the Lists.

Image
A
A B C D
3 1 2 4
B
A B C D
3 2 1 4
C
A B C D
4 2 1 3
D
A B C D
4 1 2 3
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