CO2 Properties: Understanding Dry Ice
Option 1 Analysis: Solubility
Carbon dioxide (CO2) is soluble in water, forming carbonic acid (H2CO3). It also dissolves in organic solvents like ethanol and acetone. Therefore, the statement claiming it is *not* soluble is incorrect.
Option 2 Analysis: Molecular Structure
CO2 is a molecule with a linear structure (O=C=O). The bonds between carbon and oxygen are covalent. The term "electrovalent" refers to ionic bonds, which do not accurately describe CO2. This statement is incorrect.
Option 3 Analysis: Appearance and Smell
Under normal conditions, CO2 is an invisible, colorless gas. It is also odorless. It does not possess a white foggy appearance or a pungent smell. This statement is incorrect.
Option 4 Analysis: Solid CO2
The solid form of carbon dioxide (CO2) is indeed called dry ice. This name comes from its property of sublimating directly from a solid to a gas at standard atmospheric pressure, without passing through a liquid phase, resembling how dry ice avoids leaving moisture.
Conclusion
Based on the analysis of each property, the only true statement regarding CO2 is that its solid form is known as dry ice.
Similar Questions
- The boiling point of liquid nitrogen is:
- Which one of the following substances undergoes sublimation?
Which law governs the relationship between the pressure and volume of a fixed amount of gas at constant temperature?
Which of the following is a characteristic feature of the gaseous state of matter?
Which of the following statements is true for water when it is cooled from 4°C to 0°C?
Important Questions from States of Matter
A liquid is heated up to a certain temperature. Which one of the following situation would correspond to the boiling of the liquid?
Which one among the following oxides has the highest melting point?
Equal volume of all gases, when measured at the same temperature and pressure, contain an equal number of particles. Who proposed the above law?
Match List I with List II and select the correct answer using the code given below the Lists:
Code:List I (Noble gas)
List II (Use)
A. Argon
1. In lights for advertising display
B. Neon
2. Airport landing lights and in light houses
C. Krypton
3. Light in photographer’s flash gun
D. Xenon
4. In tungsten filament to last
Match List-I with List-II and select the correct answer using the code given below the Lists:
List I
(Process)
List II
(Type of change)
A. Heating of camphor
1. Chemical
B. Cooling of water vapor up to room temperature
2. Evaporation
C. Cooking an egg
3. Condensation
D. Formation of water vapor at room temperature.
4. Sublimation
