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NDA 1 2025 GAT, question 77

Topic: Chemistry

Q77

Which one of the following is also known as Dry ice in its solid form?

  1. (a) SiO2SiO_{2}
  2. (b) CO2CO_{2}Correct answer
  3. (c) CaOCaO
  4. (d) MgOMgO

Solution.

Answer: (b) CO2CO_{2}

  1. Dry ice is solid carbon dioxide.
  2. At ordinary atmospheric pressure it sublimes directly to gas instead of melting into a liquid, which explains the name “dry” ice.