The relationship between volume and temperature for a fixed mass of gas at constant pressure was given by:
A. Gay-Lussac
B. Boyle
C. Avogadro
D. Charles
Answer: Option D
Solution (By JKExamLibrary)
Jacques Charles formulated the law: V ∝ T at constant P. Hence Charles' law. Gay-Lussac's law relates pressure and temperature at constant volume. Boyle's law: pressure-volume at constant temperature. Avogadro's law: volume-moles at same T & P. Charles also was a pioneer in ballooning.
Explanation:
CFCs release chlorine atoms under UV radiation in the stratosphere, which catalytically destroy ozone molecules. CO causes smog and is poisonous, SO₂ causes acid rain, ammonia is not a major ozone depleter. The Montreal Protocol phased out CFCs to protect the ozone layer.
Explanation:
Detergents (e.g., sulfonates) do not precipitate with Ca²⁺/Mg²⁺, so they lather well in hard water. Soaps form insoluble scum. This is a major advantage.
Explanation:
The reactivity series arranges metals from most reactive (K) to least reactive (Au). A metal higher in the series can displace a lower one from its salt solution. The order is based on tendency to lose electrons (form positive ions). More reactive = more electropositive.
No comments yet. Be the first to start the discussion!