Tag: science & technology

To answer this question, the user needs to know about the different types of substances and their properties.

The correct answer is C. Solid carbon dioxide.

Explanation for each option:

A. Liquid nitrogen: This option is incorrect. Liquid nitrogen is a colorless, odorless, and tasteless liquid that is commonly used as a refrigerant. It is not dry ice.

B. Water ice: This option is incorrect. Water ice is a frozen form of water. Although it is a solid, it is not dry ice.

C. Solid carbon dioxide: This option is correct. Dry ice is the solid form of carbon dioxide, which is a gas at room temperature. It gets its name because it does not melt into a liquid, but rather sublimates directly into a gas.

D. Frozen ethanol: This option is incorrect. Ethanol is a clear, colorless liquid that freezes at a temperature of -114 degrees Celsius. Although it is a solid at very low temperatures, it is not dry ice.

Therefore, the correct answer is C. Solid carbon dioxide.

To solve this question, the user needs to have knowledge about the colors of different gases.

Option A: Chlorine is a greenish-yellow gas at room temperature and pressure. Therefore, option A is a possible correct answer.

Option B: Hydrogen is a colorless gas at room temperature and pressure. Therefore, option B is incorrect.

Option C: Krypton is a colorless gas at room temperature and pressure. Therefore, option C is incorrect.

Option D: Neon is a colorless gas at room temperature and pressure. Therefore, option D is incorrect.

The Answer is: A