B. Obeys all gas laws perfectly at all temperatures and pressures.
C. Both B and C
D. Cannot be liquefied.
Answer: Option C
Solution (By JKExamLibrary)
An ideal gas is a theoretical gas that perfectly obeys the ideal gas equation (PV=nRT) and all gas laws under all conditions. It assumes no intermolecular forces and zero molecular volume. Because of these assumptions, an ideal gas cannot be liquefied, unlike real gases which deviate at high pressures.
Explanation:
Cement compounds react with water (hydration) forming hydrated silicates and aluminates, which crystallize and interlock, giving strength. This is exothermic.
Explanation:
Froth flotation separates sulfide ores: powdered ore mixed with water and pine oil; air bubbles carry oil-wetted ore particles to surface as froth; gangue sinks. Used for ZnS, PbS.
Explanation:
A separating funnel allows immiscible liquids to form layers; the denser liquid is drained from the bottom. Fractionating column is for miscible liquids with close boiling points, condenser for distillation, centrifuge for separating fine solids or liquids of different densities by spinning.
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