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Fill in the blanks:
(a) Evaporation of a liquid at room temperature leads to a——— effect.
(b) At room temperature the forces of attraction between the particles of solid substances are———than those which exist in the gaseous state.
(c) The arrangement of particles is less ordered in the ——— state. However, there is no order in the ——— state.
(d) ——— is the change of solid state directly to vapour state without going through the ——— state.
(e) The phenomenon of change of a liquid into the gaseous state at any temperature below its boiling point is called———.
Fill in the blanks:
(a) Evaporation of a liquid at room temperature leads to a cooling effect.
(b) At room temperature the forces of attraction between the particles of solid substances are stronger than those which exist in the gaseous state.
(c) The arrangement of particles is less ordered in the liquid state. However, there is no order in the gaseous state.
(d) Sublimation is the change of solid state directly to vapour state without going through the liquid state.
(e) The phenomenon of change of a liquid into the gaseous state at any temperature below its boiling point is called Evaporation.
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- Fill in the following blanks with suitable words :(a) The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................(b) The smell of perfume gradually spreads across a room due to .....................(c) Solid, liquid, and gas are the three ........................ of matter.(d) At room temperature, the forces of attraction between the particles of solid substances are ....................... then those which exist in the gaseous state.(e) The arrangement of particles is less ordered in the ...................... state. However, there is no order in the ..................... state.
- Metals are generally solid. Which of the following metals is in the liquid state at room temperature?MercurySilverAluminiumSodium
- How is the physical state of water at room temperature is liquid?
- Which of the following metal exists in the liquid state at room temperature?magnesiummanganesemercurysodium
- The non-metal which exists in the liquid state at room temperature is:fluorinechlorinebromineiodine
- Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?NaFeCrHg
- Choose the correct statement of the following(a) Conversion of solid into vapours without passing through the liquid state is called sublimation.(b) Conversion of vapours into solid without passing through the liquid state is called vaporisation.(c) Conversion of vapours into solid without passing through the liquid state is called freezing.(d) Conversion of solid into liquid is called sublimation.
- Name one metals and one nonmetal which exist in liquid state at room temperature.
- Name one metal and one non-metal which exist in liquid state at room temperature.
- The conversion of a solid into vapours without passing through the liquid state is called :(a) vaporization (b) fusion(c) sublimation (d) freezing
- Name two solid, two liquid and two gaseous elements at the room temperature.
- (a) Conversion of solid to vapour is called sublimation. Name the term used to denote the conversion of vapour to solid.(b) Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion?
- Why does the temperature of a substance remain constant during the change of state?
- Name the metal which is liquid at room temperature.
- For any substance, why does the temperature remain constant during the change of state?

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