Physics
Match the following columns :
| Column A | Column B | ||
|---|---|---|---|
| (a) | A molecule is composed of | (i) | does not exist free in nature. |
| (b) | Ice, water and water vapour | (ii) | can vibrate only up to about 10-10 m from their mean positions. |
| (c) | An atom | (iii) | atoms. |
| (d) | Gases | (iv) | are the three states of water. |
| (e) | The molecules of a solid | (v) | occupy space |
Matter
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Answer
| Column A | Column B | ||
|---|---|---|---|
| (a) | A molecule is composed of | (iii) | atoms. |
| (b) | Ice, water and water vapour | (iv) | are the three states of water. |
| (c) | An atom | (i) | does not exist free in nature. |
| (d) | Gases | (v) | occupy space |
| (e) | The molecules of a solid | (ii) | can vibrate only up to about 10-10 m from their mean positions. |
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Related Questions
Fill in the blanks :
(a) All the molecules of a substance are …………… .
(b) The inter-molecular spacing is …………… in solids …………… in liquids and …………… in gases.
(c) The molecular motion in liquid and gas is in …………… path.
(d) In a solid, the molecules …………… but they remain at their fixed positions.
(e) The inter-molecular forces are the weakest in …………… .
(f) A solid exerts pressure …………… .
(g) Gases are …………… dense.
(h) Solids are …………… rigid.
Write true or false for each statement :
(a) The molecules of each substance are identical.
(b) The inter-molecular forces are effective at all distances between the two molecules.
(c) The molecules in a substance are in random motion.
(d) In a gas, the molecules can move anywhere in space.
(e) Liquids are less viscous than gases.
Define matter. What is its composition?
Name the three states of matter.