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प्रश्न
Give one difference between atoms and molecules.
उत्तर
Atoms may or may not have an independent existence. Molecules have an independent existence.
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संबंधित प्रश्न
Fill in the blank:
The molecules are made up of ________
Differentiate between the following.
Liquids and gases .
Write whether the following statement are true or false.
A gas has no free surface.
Write true or false for the following statement
The inter-molecular forces are effective at all distances between the two molecules.
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 |
Give reason :
A red ink drop added to a small amount of water in a glass turns water red in some time.
Write true or false for the statement. Rewrite the false statement correctly.
The smallest part of an element capable of independent existence is called an atom.
Give a reason for the following:
An empty tumbler lowered into a glass beaker containing water, on tilting shows bubbles of air coming out, but when not tilted, no bubbles are seen.
Write scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured into a glass.
Write scientific reasons.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
