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The correct answer is (c) (ii) and (iii). When some hydrogen gas leaks out (ii), fewer molecules remain, increasing intermolecular distance. When the container’s volume increases (iii), molecules spread out to occupy the larger space, increasing their distance. Class 9th ...
The correct answer is (a) humidity is high in air. During the rainy season, the air contains more water vapor, which increases humidity. This reduces the rate of evaporation because the air is already saturated with moisture, limiting further evaporation.
The correct answer is (d) all of these. Solids, liquids and gases differ in particle arrangement, attractive forces and spaces between particles. Solids have tightly packed particles with strong forces, liquids have moderate spacing and gases have widely spaced particles ...
The correct answer is (c) solid CO₂. Dry ice is the solid form of carbon dioxide (CO₂). It sublimates directly into gas at room temperature without passing through the liquid phase, making it useful for cooling and creating fog effects.
The correct answer is (a) Conversion of solid into vapours without passing through the liquid state is called sublimation. Sublimation occurs when substances like camphor or dry ice change directly from a solid to a gas without becoming liquid. Class ...
