D. Differentiate between the following.
1. Mixture and compound
2. Residue and sediment
3. Homogeneous and heterogeneous mixtures 36
E. Answer these questions,
1. What do you understand by an alloy? 37
2. What is the need for the separation of
components of a mixture? 10
3. What do you understand by threshing?4/
4. How is common salt obtained from sea water? 44
ation. How do we separate impurities and bran
from flour? Why? 42
Answers
Answer:
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Explanation:
Compound are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances. Compounds can be of three types, which are: covalent compounds, metallic compounds and ionic compounds.
1. Compound are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances.
2. Residue is the material which is left behind during any process. Sediment is the material that settles down at the bottom of a liquid. Sediment means matter that settles to the bottom of a liquid.
3. A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly different substances or phases. ... Solutions have particles which are the size of atoms or molecules - too small to be seen.
1. a metallic material, such as steel, brass, or bronze, consisting of a mixture of two or more metals or of metallic elements with nonmetallic elements. Alloys often have physical properties markedly different from those of the pure metals.
2. Separation of Mixtures
In a chemical reaction, it is important to isolate the component(s) of interest from all the other materials so they can be further characterized.
Threshing - Threshing is the process of loosening the edible part of grain from the chaff to which it is attached.
Common salt is obtained from sea-water by the process of evaporation. Sea water is trapped in large, shallow pools and allowed to stand there. The sun's heat evaporates the water slowly and common salt is left behind
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