defence exam Agniveer Army Technical Mock Test Series 2025 General Science Chemistry Chemical Reaction
S1: Burning wood is a complex process where wood chemically reacts with oxygen to produce carbon dioxide, water vapor, and ash.
S2: The melting of butter in a pan is a physical change as the butter can solidify again under colder conditions without altering its chemical structure.
S3: The formation of wine from grapes involves fermentation, a biological and chemical process where sugars are converted into alcohol and carbon dioxide
1
S1, S2, and S3 are true
2
S1 and S2 are true; S3 is false
3
S2 and S3 are true; S1 is false
4
Only S1 is true