The compound FeS (Iron(II) sulfide) is not attracted by a magnet because iron has lost its magnetic properties (d). During the chemical reaction between iron and sulfur, a new compound forms, where iron atoms are bonded with sulfur, altering its ...
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The metalloid among these is (b) Germanium. Metalloids have properties of both metals and non-metals. Germanium is a semiconductor, meaning it conducts electricity under certain conditions, making it useful in electronics. Sodium and magnesium are metals, while oxygen is a ...
Ordinary starch stirred with cold water will result in a suspension (c) because starch particles do not dissolve in cold water but remain dispersed as insoluble particles. This mixture is heterogeneous, and the starch eventually settles at the bottom over ...
(d) P is obtained by the combination of X and Y. Thus, it is a compound. X and Y cannot be broken into simpler substances. Thus, they are elements. As P is a compound, it has a fixed composition. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/
(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/
(c) The composition in wood and soil may not be the same throughout, only ice and air are homogeneous. https://www.tiwariacademy.com/ncert-solutions-class-9-science-curiosity-chapter-2/
(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/