1
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following is an endothermic reaction ?
1
CH4(g) + 2O2(g) → CO2(g) + 2O2(g)
2
C6H12O6(aq) + 6O2(g) → 6CO2(g) + 6H2O(I)
3
N2(g) + 3H2(g) → 2NH3(g)
4
2Pb(NO3)2(s) → 2PbO(s) + 4NO2(g) + O2(g)
2
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following is known as ‘water gas’ ?
1
H2O + CO2
2
NH3
3
H2 + N2
4
CO + H2
3
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following statements is NOT correct ?
1
Diamond is hard due to extended covalent bonding in it 
2
Fullerene is composed of five and six membered rings
3
Diamond is a good conductor of electricity 
4
Graphite is used as a lubricant 
4
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
The book ‘The Origin of Species by Means of Natural Selection’ was authored by
1
Charles Darwin
2
Carolus Linnaeus 
3
Barbara McClintock 
4
Copernicus