Advertisements
Advertisements
प्रश्न
Explain the following giving an example.
Pure substance
Advertisements
उत्तर
- A pure substance is defined as one that contains only one type of atom or molecule.
- A pure substance has the same colour, taste and texture at any given temperature and pressure and a fixed melting and boiling point under continuous pressure.
- Examples include hydrogen gas, salt chloride, and water.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Revolution of the earth around the sun is a ________ change.
State whether the following is physical or chemical changes.
water cycle in nature —
Give two examples of periodic changes.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Select the correct answer from the choice given below to complete the sentence
A change in which a substance retains its identity is a
______ change.
Tearing of sheet of paper into pieces is ______ By the process of Heating of water, change.
Gas exists in three states as solid, liquid, and gas.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a –
Adding sugar to milk is a physical change.
