Multiple choice

Which of the following statements about solid carbon dioxide is/are correct?

  1. It is used in theatres to give special effects.
  2. It is extremely a cold substance.
  3. It is used to freeze food and to keep ice-cream cold.

  1. Only 1

  2. Only 2

  3. Only 1 and 2

  4. All 1, 2 and 3
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Statement (1) is correct. Solid carbon dioxide is used in theaters to give special effects.

Statement (2) is correct. Solid carbon dioxide or dry ice is extremely cold. Its approx. temperature is -109.3°F or -78.5°C. Statement (3) is correct. Solid carbon dioxide is used to freeze food and to keep ice cream cold because of its existence in extremely low temperature.

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