Tiêu đề 02. IS MATTER AROUND US PURE.pdf ✅

TO DOWNLOAD ORIGINAL VERSION OF PDF CONTACT: +919206306398 PER CLASS PDF COST JUST Rs: 500 Only 02. IS MATTER AROUND US PURE WORKSHEET 1 (1.) What type of mixtures are separated by the technique of crystallisation? (1) Homogeneous mixtures containing dissolved salt (2) Heterogeneous mixtures containing dissolved salt (3) Both A and B (4) None of the above (2.) State whether freezing of water is a physical change or a chemical change ? (1) Physical change (2) Chemical change (3.) Classify whether 'diamond' is a metal, non-metal or metalloid. (1) Metal (2) Non-metal (3) Metalloid (4) None of these (4.) Which separation techniques will you apply for the separation of the Tea leaves from tea ? (1) Winnowing (2) Filtration (3) Centrifugation (4) Magnetic separation (5.) In the above figure, a child wanted to separate the mixture of dyes constituting a sample of ink. He marked a line by the ink on the filter paper and placed the filter paper in a glass containing water . The filter paper was removed when the water moved near the top of the filter paper. Name the technique used by the child. (1) Filtration (2) Chromatography (3) Sublimation (4) Distillation (6.) Iodine belongs to which group of elements? (1) Metals (2) Non - metals (3) Metalloids (4) NONE OF THESE (7.) Define a compound. (1) One which is made up of only one kind of particles. (2) One which contains two or more different kinds of particles (atoms or molecules). (3) Substance which cannot be split up into two or more simpler substances by the usual chemical methods of applying heat, light or electric energy.