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.
(a) The best evidence of the particles of matter are constantly moving comes from the studies of diffusion and Brownian motion.
(b) The smell of perfume gradually spreads across a room due to diffusion.
(c) Solid, liquid and gas are the three states of matter.
(d) At room temperature, the forces of attraction between the particles of solid substances are more than those which exist in the gaseous state.
(e) The arrangement of particles is less ordered in the liquid state. However, there is no order in the gaseous state.
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- Which of the following statement is incorrect?(a) the particles of matter are very, very small(b) the particles of matter attract one another(c) the particles of some of the matter are moving constantly(d) the particles of all the matter have spaces between them
- Metals are generally solid. Which of the following metals is in the liquid state at room temperature?MercurySilverAluminiumSodium
- Matter exists in three physical forms -solid, liquid and gas. In which state the force of attraction between the molecules is (a)strongest (b)weakest?
- Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?NaFeCrHg
- Arrange the following substances in increasing order of forces of attraction between the particles—water, sugar, and oxygen.
- Which of the following metal exists in the liquid state at room temperature?magnesiummanganesemercurysodium
- Name two processes which provide the best evidence for the motion of particles in matter.
- How is the physical state of water at room temperature is liquid?
- When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation?
- State the differences between solid, liquid and gas.
- A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?Water, air, windAir, sugar, oilOxygen, water, sugarSalt, juice, air
- The non-metal which exists in the liquid state at room temperature is:fluorinechlorinebromineiodine
- What is the scientific name of particles which make up matter?
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