According to Charles' law, at constant pressure, volume of a gas is directly proportional to:
A. Density
B. Absolute temperature (Kelvin)
C. Pressure
D. Temperature in Celsius
Answer: Option B
Solution (By JKSSB Mock Tests)
V ∝ T (in Kelvin). Using Celsius gives a linear relationship but not direct proportionality (line does not pass through origin). Absolute zero (0 K = -273.15°C) is the theoretical temperature of zero volume.
Explanation:
The ion M³⁺ has lost 3 electrons, so the neutral atom M has 10 + 3 = 13 electrons. Thus, the atomic number is 13. The mass number is protons + neutrons = 13 + 14 = 27. The element is Aluminum, and the specific isotope is Aluminum-27.
Explanation:
Green chemistry aims to design products and processes that minimize the use and generation of hazardous substances. Using hydrogen peroxide (H2O2) for bleaching paper is an example of green chemistry because it breaks down into harmless water and oxygen, unlike chlorine which can produce toxic, persistent organochlorine byproducts.
Explanation:
Crude oil is separated into fractions (petrol, kerosene, diesel, etc.) based on boiling points by fractional distillation. Cracking, reforming are secondary processes.
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