Advertisements
Advertisements
प्रश्न
Name the process associated with the following
A fine beam of light entering through a small hole in a dark room illuminates the particles in its paths.
Advertisements
उत्तर
Tyndall effect – Scattering of light
APPEARS IN
संबंधित प्रश्न
Fill in the blank
A pure substance has definite.................. and constant ..............
Give two examples of the following.
Inert gases
Give one use of the following substance:
Coal
Answer the following question:
Why are copper and aluminium used to make electric wires?
Answer the following question:
When iron is mixed with sulphur at room temperature, it does not form a compound. Why?
Tick (√) the correct alternative from the choice given for the following statement.
Sugar is a compound which consists of the elements
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – a gas with a pungent, choking odour which is lighter than air
Write the names of elements from the following symbol:
Fe
Explain the term ‘mixture’.
Match the following.
| 1. | Element | Made up of molecules |
| 2. | Compound | Impure substance |
| 3. | Colloid | Settles down on standing |
| 4. | Suspension | Pure substance |
| 5. | Mixture | Made up of atoms |
