Advertisements
Advertisements
Question
Define the following term of Atom .
Advertisements
Solution
Atom — An atom is the smallest part of an element that takes place in a chemical reaction.
APPEARS IN
RELATED QUESTIONS
In a beam of sunlight entering a room, we can sometimes see dust particles moving in a haphazard way in the air. Why do these dust particles move?
What is meant by saying that metals are lustrous ?
What elements do the following compounds contain ?
Sugar, Common salt
Define a compound. Give two points of evidence to show that sodium chloride is a compound.
Name a metal which can be easily cut with a knife.
In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :
Hydrogen, Oxygen, Steam, Chlorine
What is the name of the clear liquid formed when a solid dissolves in a liquid ?
Choose the correct answer.
A 5 per cent sugar solution means that :
What difference in the property of two miscible liquids enables their separation by fractional distillation ?
Name the process by which common salt is purified.
Fill in the following blanks with suitable words :
If a mixture contains iron filings as one of the constituents, it can be separated by using a .......................
How would you separate iodine from a mixture of iodine and common salt ?
The dyes present in fountain pen ink can be separated by the technique of :
If there is a sudden shower, we take shelter under a roof at the roadside. Even though the rain does not fall on us directly, we get wet to some extent. Why ?
Asmita went to buy an earthen pot. There she saw many things kept for sale.
How did she identify what she needed?
Which among the following is not a matter?
Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions
Match the physical quantities given in column A to their S I units given in column B:
| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
Evaporation does form bubbles.
Define the term matter.
