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प्रश्न
What are the conditions for 'something' to be called 'matter'?
उत्तर
The main conditions for something to be matter are, it should:
- occupy space and
- have mass
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संबंधित प्रश्न
Which one is a kind of matter:
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?
Name the property which enables metals to be drawn into wires.
Which of the following does not have a fixed melting point/boiling point ?
What is the name of the clear liquid formed when a solid dissolves in a liquid ?
How will you test whether a given solution is a colloidal solution ?
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine
State whether the following statement are true or false :
Salt and water can be recovered from an aqueous salt solution by the process of evaporation.
Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
Describe a method for separating a mixture of iron filings and sulphur powder other than that by using a magnet.
The liquid air has three components X, Y and Z whose boiling points are : –186°C, –183°C and –196°C,
respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed
up slowly :
(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?
(b) Which component will be collected from the top part of the fractional distillation column ? Why ?
(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?
(d) What could the component X, Y and Z be ?
The property which allows the metals to be hammered into their sheets is ______.
Diffentiate between absorption and adsorption.
______ is a smallest particle.
Which of the following are homogeneous in nature?
(i) ice
(ii) wood
(iii) soil
(iv) air
Liquids cannot be compressed and they have fixed volume.
Complete the following table:
| S.No. | CELSIUS | KELVIN |
| 1. | 90°C | 363 K |
| 2. | ______ | 283 K |
| 3. | 63 °C | ______ |
| 4. | 250°C | ______ |
| 5. | ______ | 303 K |
Give an example of a molecule.
Define the term matter.
