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Answers
5.
Reason :
Solution is prepared by the combination of two same phases of matter. Solution: A solution is a special type of homogeneous mixture composed of two or more substances and from a single phase. solution is prepared by the combination of two either same phases & and different phases of matter.
6.
Reason-
Alloys are mixtures because the elements that make it up are physically together, not chemically combined or joined together as in a compound. No new chemical properties are shown once the metals are mixed. So, an alloy retains the properties of the constituent elements. ... Hence, an alloy is considered as a mixture.
9.
a) The milk sample was illuminated because they placed a beaker inside the box.
b) For scattering of light the size of particles should be large enough. Since the particles of solution are not enough to scattered the beam of light, hence same result were not observed.
C ) Soap bubbles and fog are the colloids, hence same effect, i.e. scattering of light is shown by these. This is known as Tyndall effect.
Answer:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.