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प्रश्न
Write whether the following statement is true or false.
A gas has no free surface.
विकल्प
True
False
MCQ
सत्य या असत्य
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उत्तर
True
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Composition of Matter
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संबंधित प्रश्न
Give two examples for the following :
Substances that are rigid and not compressible.
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 position. |
| C. | An atom | iii. | atoms. |
| D. | Gases | iv. | are the three states of water. |
| E. | The molecules of a solid | v. | occupy space |
The molecules in a substance are in motion. What type of path do they follow?
Define Intermodular space.
Define the Atom.
Fill in the blank
Molecules in a ............ are packed very closely.
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) Any number of free surfaces. |
| (d) Gases | (iv) Gaps between particles. |
| (e) Intermolecular space | (v) Changes of state from solid to gas. |
Identify the odd term out and explain.
In one sample of brass, the following ingredients were found: copper (70%) and zinc (30%). Identify the solvent, solute and solution from these.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
