Chemistry
(a) Water is matter because it has …………… and occupies ……………
(b) Any matter which has a definite …………… but no definite shape is called a …………….
(c) …………… and …………… can flow.
(d) The molecules are at a greater distance in …………… as compared to liquids.
(e) Water boils at …………… °C.
(f) The physical state of a substance, which has neither fixed volume nor fixed shape is a ……………
Matter
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Answer
(a) Water is matter because it has mass and occupies space.
(b) Any matter which has a definite volume but no definite shape is called a liquid.
(c) Liquids and gases can flow.
(d) The molecules are at a greater distance in gases as compared to liquids.
(e) Water boils at 100°C.
(f) The physical state of a substance, which has neither fixed volume nor fixed shape is a gas.
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Related Questions
The change of state of liquid into vapour below its boiling points is called:
- melting
- freezing
- boiling
- evaporation
When a substance is heated, it can:
- undergo a chemical change
- change its state
- show expansion
- all of the above
Write whether the following statements are true or false.
(a) Only water can exist in three different states. ……………
(b) If the container in which a gas is collected has an opening, the gas will flow out and spread itself indefinitely. ……………
(c) Solids have the largest inter-molecular space. ……………
(d) There is no difference between evaporation and boiling. ……………
(e) All solids, on heating, first change to liquid and then to the gaseous state. ……………
(f) The intermolecular force of attraction is the weakest in gases. ……………
(g) A gas has no free surface. ……………
Match the following
Column A Column B (a) Solids (i) Can flow in all directions. (b) Sublimation (ii) The temperature at which a
liquid changes into its gaseous state(c) Boiling point (iii) Can have any number of free surface (d) Gases (iv) Gaps between molecules (e) Intermolecular space (v) Change of state directly from solid to gas.