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प्रश्न
Name the terms for the particles of matter which may or may not have independent existence.
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उत्तर
this criteria is shown by atoms of any matter which may exist alone (like helium) or may not exist alone and exist in molecular form (like oxygen/o₂ )
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संबंधित प्रश्न
Fill in the blank :
The substances which can flow are called ________
Define the following term of Matter .
What is the general name of the materials which contain at least two pure substances and show the properties
of their constituents ?
Name a metal which can be easily cut with a knife.
Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.
- What type of substance is B ?
- What type of substance is C ?
- Name the gas (i) D, and (ii) E ?
- State one characteristic property of gas D.
- Write one test to identify gas E.
Define Sol and give one example.
9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
How will you separate camphor, common salt and iron nails from their mixture ?
How is water purified on a large scale at water works ? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply ?
The dyes present in fountain pen ink can be separated by the technique of :
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
Matter is made up of ______.
Atoms or groups of atoms having a charge are called ______.
Intermolecular space is maximum in ______.
Gases change to liquid by the process of ______.
Solids do not flow.
Evaporation does form bubbles.
Gases do not diffuse very easily.
Gas-solid is ______.
