(c) Changes (i), (iii) and (iv) are physical in nature because we can get back to the original form by physical methods. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/
Discussion Forum Latest Questions
(c) The name given to rusting of iron is corrosion and it involves a chemical change. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/
(c). A mixture contains two elements or two compounds or an element and a compound. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/
(a) Vinegar (acetic acid) dissolves in water to give a true solution. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/
(b) NaCl is the major compound present in common salt. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/