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NDA 2023
Exam
NDA
Year
2023
Subject
General Ability
Chapter
General Science

NDA 2023 · General Ability · General Science

Which one of the following processes involves chemical reaction ?

Which one of the following processes involves chemical reaction ?

Options

  1. AEvaporation of petrol
  2. BDissolution of salt in water
  3. CStoring of oxygen gas under pressure in a gas cylinder
  4. DBurning of magnesium ribbon in air

Correct answer

D. Burning of magnesium ribbon in air

Step-by-step solution

In a chemical reaction, the state of the matter changes and the change is irreversible in nature from the given options (d) is correct. 2Mg+O2→2MgO+2 \mathrm{Mg}+\mathrm{O}_2 \rightarrow2 \mathrm{MgO}+ Heat Other three are not a chemical change.
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