Related Questions

তরল অবস্থায় পরিবর্তিত না হয়ে কঠিন অবস্থা থেকে সরাসরি গ্যসীয় অবস্থায় রূপান্তরিত হওয়ার পদ্ধতিকে বলে(The conversion of solid state directly into a gaseous state eithout passing through liquid state is called)
A Sublimation
B Evaporation
C Freezing
D Boiling
In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous
A Uranium oxide
B Uranium hexaflouride
C Uranium carbide
D Uranium sulphate
The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth's early life and solidified into hard rock's called
A granite
B basalt
C igneous rocks
D sedimentary rocks
A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal
A Kinetic energy
B Intermolecular forces of attraction
C Potential energy
D Total energy
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils
A Cause cholesterol build up and blood clotting
B Are prone to rancid oxidation
C Always contain some amount of nickel (as their complete removal is very difficult)
D Have affinity to retain harmful sulphur compounds
What is the process of conversion of solid state directly to gaseous state called?
A Evaporation
B Condensation
C Sublimation
D Distillation
While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the gas in the solution phase and in the gaseous phase is
A Infinity
B Unity
C Constant
D Negative
Gaseous exchanges through the respiratory membrane is directly proportional to
A Surface area of respiratory membrane
B Diffusion co-efficient of gas
C Solubility of the gas
D The thickness of respiratory membrane
E Molecular weight of the gas
The presence of solid, liquid or gaseous compounds, which may not be normally present, or in excess concentration in the atmosphere is called
A air pollution
B water pollution
C soil pollution
D radioactive pollution
The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called
A Surface tension
B Compressibility
C Capillarity
D Viscosity

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