1
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following statements is not correct for the given reaction?

Fe(s) + CuSO4 (aq) $$\to$$ FeSO4 (aq) + Cu (s)
A
Iron is the reducing agent
B
The solution turns green in colour after the reaction
C
Copper is a more reactive metal than iron
D
The reaction is an example of a redox reaction
2
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following is an organic acid?
A
Hydrochloric acid
B
Nitric acid
C
Acetic acid
D
Sulphuric acid
3
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Dinitrogen (N2) and dioxygen (O2) are the main constituents of air, but they do not react with each other to form oxides of nitrogen because,
A
the reaction requires initiation by a catalyst
B
oxides of nitrogen are unstable
C
the reaction is endothermic and requires very high temperature
D
the stoichiometry of N2 and O2 in air is not ideal for the reaction to take place
4
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The equivalent weight of oxalic acid in C2H2O4 . 2H2O is
A
45
B
63
C
90
D
126
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