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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
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Fill in the blank :
The state of matter with definite volume and definite shape is called______
Classify the following into elements, compounds and mixtures:
- Sodium
- Soil
- Sugar solution
- Silver
- Calcium carbonate
- Tin
- Silicon
- Coal
- Air
- Soap
- Methane
- Carbon dioxide
- Blood
Which of the following is a mixture ?
Salt, Air, Water, Alum, Sugar
Name a non-metal which is a good conductor of electricity.
Name a liquid which can be classified as a pure substance and conducts electricity.
Name a metal which can be easily cut with a knife.
“Is malleable and ductile” best describes :
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
What is meant by the concentration of a solution ?
Describe a method to separate a mixture of camphor and sand.
How will you separate camphor, common salt and iron nails from their mixture ?
Explain how, nitrogen , oxygen and argon gases are separated from air.
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 ?
Complete the given analogy.
Murukku from hot oil: ______:: Coffee powder residue from decoction: ______
The particles in the matter are extremely small and can be seen even with a powerful microscope.
Liquids cannot be compressed and they have fixed volume.
The physical state of water at 373 K is ______.
Atoms are tiny particles that repel each other when they are squeezed very close.
Give an example of a molecule.
