1
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following is NOT present in cement ?
1
2CaO.SiO2
2
3CaO.SiO2
3
4CaO.SiO2
4
3CaO.Al2O3
2
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following is NOT a chemical change ?
1
Burning of coal 
2
Rusting of metal 
3
Melting of ice
4
Reaction of acid with base  
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
The interconversion of states of matter is a physical change
2
During burning of a candle, both chemical and physical changes take place 
3
During a physical change, the chemical composition of miolecules changes
4
Rusting of iron is a chemical change 
4
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following is NOT a heterogeneous mixture ? 
1
Sulphur in carbon disulphide 
2
Mixture of sugar 8 and salt crystals 
3
Sandy water 
4
Sulphur in water