Two methods by which rusting of iron can be prevented are greasing and galvanization. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-6/
Two methods by which rusting of iron can be prevented are greasing and galvanization.
When carbon dioxide is passed through lime water, it turns milky due to the formation of Calcium carbonate (CaCO3). https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-6/
When carbon dioxide is passed through lime water, it turns milky due to the formation of Calcium carbonate (CaCO3).
Physical Changes: (b) Dissolving sugar in water, (d) Melting of wax, (e) Beating Aluminium to make Aluminium foil. Chemical Changes: (a) Photosynthesis, (c) Burning of coal, (f) Digestion of food https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-6/
Physical Changes:
(b) Dissolving sugar in water, (d) Melting of wax, (e) Beating Aluminium to make Aluminium foil.
Chemical Changes:
(a) Photosynthesis, (c) Burning of coal, (f) Digestion of food
Fill in the blanks: Two methods by which rusting of iron can be prevented are _________ and _________.
Two methods by which rusting of iron can be prevented are greasing and galvanization. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-6/
Two methods by which rusting of iron can be prevented are greasing and galvanization.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-6/
See lessFill in the blanks: The chemical name of baking soda is _________.
The chemical name of baking soda is Sodium bicarbonate (NaHCO3). https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-6/
The chemical name of baking soda is Sodium bicarbonate (NaHCO3).
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-6/
See lessFill in the blanks: When carbon dioxide is passed through lime water, it turns milky due to the formation of _________.
When carbon dioxide is passed through lime water, it turns milky due to the formation of Calcium carbonate (CaCO3). https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-6/
When carbon dioxide is passed through lime water, it turns milky due to the formation of Calcium carbonate (CaCO3).
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-6/
See lessClassify the changes involved in the following processes as physical or chemical changes: (a) Photosynthesis (b) Dissolving sugar in water (c) Burning of coal (d) Melting of wax (e) Beating Aluminium to make Aluminium foil (f) Digestion of food
Physical Changes: (b) Dissolving sugar in water, (d) Melting of wax, (e) Beating Aluminium to make Aluminium foil. Chemical Changes: (a) Photosynthesis, (c) Burning of coal, (f) Digestion of food https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-6/
Physical Changes:
(b) Dissolving sugar in water, (d) Melting of wax, (e) Beating Aluminium to make Aluminium foil.
Chemical Changes:
(a) Photosynthesis, (c) Burning of coal, (f) Digestion of food
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-6/
See less