Which of the following gases will diffuse the fastest?
A. Carbon dioxide (CO₂)
B. Oxygen (O₂)
C. Hydrogen (H₂)
D. Nitrogen (N₂)
Answer: Option C
Solution (By JKExamLibrary)
According to Graham's law, the rate of diffusion is inversely proportional to the square root of molar mass. Hydrogen (H₂) has the lowest molar mass (2 g/mol) among the options (O₂=32, N₂=28, CO₂=44), so it will diffuse the fastest under identical conditions of temperature and pressure.
Explanation:
Down a group, atomic radius increases and inner shells shield the valence electron, reducing effective nuclear attraction, making electron removal easier.
Explanation:
Ethanol (CH₃CH₂OH) and dimethyl ether (CH₃OCH₃) have the same molecular formula C₂H₆O but different functional groups: alcohol (-OH) vs ether (-O-). This is functional group isomerism. Ethanal is C₂H₄O, acetic acid C₂H₄O₂. Methoxymethane is another name for dimethyl ether. Functional isomers exhibit different chemical properties; ethanol reacts with Na, ether does not.
Explanation:
Hydrogen peroxide (H₂O₂) is a strong oxidizing agent that kills microorganisms through oxidative damage and bleaches colored substances. It is used as a disinfectant (3% solution), in hair bleaching, and in the paper textile industry. Ethanol is a disinfectant but not a strong bleaching agent. Methanol is toxic, not used for sterilization. Acetone is a solvent.
No comments yet. Be the first to start the discussion!