Pure substance: Water, salt, sugar etc. Mixture: Salt water, soil, wood, air, cold drink, rubber, sponge, fog, milk, butter, clothes, food. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
Pure substance: Water, salt, sugar etc.
Mixture: Salt water, soil, wood, air, cold drink, rubber, sponge, fog, milk, butter, clothes, food.
• Melting of butter in a pan → Physical change • Rusting of almirah → Chemical change • Boiling of water to form steam → Physical change • Passing of electric current through water, and water breaking down into hydrogen and oxygen gas → Chemical change • Dissolving common salt in water → Physical chRead more
• Melting of butter in a pan → Physical change
• Rusting of almirah → Chemical change
• Boiling of water to form steam → Physical change
• Passing of electric current through water, and water breaking down into hydrogen and oxygen gas → Chemical change
• Dissolving common salt in water → Physical change
• Making a fruit salad with raw fruits → Physical change
• Burning of paper and wood → Chemical change
By the technique of crystallization, pure solids are separated from impurities. For example, salt obtained from sea is separated from impurities; crystals of alum (Phitkari) are separated from impure samples. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/scRead more
By the technique of crystallization, pure solids are separated from impurities. For example, salt obtained from sea is separated from impurities; crystals of alum (Phitkari) are separated from impure samples.
(iii) Camphor can be separated from salt by sublimation. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
(iii) Camphor can be separated from salt by sublimation.
Salt can be separated from sea-water by evaporation. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
Salt can be separated from sea-water by evaporation.
Try segregating the things around you as pure substances or mixtures.
Pure substance: Water, salt, sugar etc. Mixture: Salt water, soil, wood, air, cold drink, rubber, sponge, fog, milk, butter, clothes, food. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
Pure substance: Water, salt, sugar etc.
Mixture: Salt water, soil, wood, air, cold drink, rubber, sponge, fog, milk, butter, clothes, food.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
Classify the following as chemical or physical changes:
• Melting of butter in a pan → Physical change • Rusting of almirah → Chemical change • Boiling of water to form steam → Physical change • Passing of electric current through water, and water breaking down into hydrogen and oxygen gas → Chemical change • Dissolving common salt in water → Physical chRead more
• Melting of butter in a pan → Physical change
See less• Rusting of almirah → Chemical change
• Boiling of water to form steam → Physical change
• Passing of electric current through water, and water breaking down into hydrogen and oxygen gas → Chemical change
• Dissolving common salt in water → Physical change
• Making a fruit salad with raw fruits → Physical change
• Burning of paper and wood → Chemical change
What type of mixtures are separated by the technique of crystallization?
By the technique of crystallization, pure solids are separated from impurities. For example, salt obtained from sea is separated from impurities; crystals of alum (Phitkari) are separated from impure samples. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/scRead more
By the technique of crystallization, pure solids are separated from impurities. For example, salt obtained from sea is separated from impurities; crystals of alum (Phitkari) are separated from impure samples.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
Name the technique to separate camphor from salt.
(iii) Camphor can be separated from salt by sublimation. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
(iii) Camphor can be separated from salt by sublimation.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
Name the technique to separate salt from sea-water.
Salt can be separated from sea-water by evaporation. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
Salt can be separated from sea-water by evaporation.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/