Mercury and bromine are both
(a) liquid at room temperature
(b) solid at room temperature
(c) gases at room temperature
(d) both (a) and (b)
Q When light is passed through water containing a few drops of milk, it shows a bluish tinge. This is due to the ……(A)……… of light by milk and the phenomenon is called …(B)……….. This indicates that milk is a ……(C)……… solution.
Choose the correct sequence of options given below
a) A-Scattering, B-Tyndal effect C- Colloidal
b) A-Colloidal. B-Tyndal effect C- Scattering
c) A-Scattering. B- Colloidal C- Tyndal effect
d) A-Tyndal effect B- Colloidal. C- Scattering
Q When no more solute can be dissolved in a solution at a given temperature it is called ______-
a) Homogeneous b) Un saturated
c) Heterogeneous d) Saturated
Q.The concentration of a solution depends on the amount of______ present in a given solution a) solvent
b) solution
c) solute d) all of the above
Answers
Answer:
The characteristics that enable us to distinguish one substance from another are called properties. A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. We can observe some physical properties, such as density and color, without changing the physical state of the matter observed. Other physical properties, such as the melting temperature of iron or the freezing temperature of water, can only be observed as matter undergoes a physical change. A physical change is a change in the state or properties of matter without any accompanying change in its chemical composition (the identities of the substances contained in the matter). We observe a physical change when wax melts, when sugar dissolves in coffee, and when steam condenses into liquid water (Figure 1). Other examples of physical changes include magnetizing and demagnetizing metals (as is done with common antitheft security tags) and grinding solids into powders (which can sometimes yield noticeable changes in color). In each of these examples, there is a change in the physical state, form, or properties of the substance, but no change in its chemical composition.
Explanation:
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Answer:
1)a) Solid at room temperature
2)a) Scattering, tyndall effect, colloidal
3)d) Saturated solution
4a) Solvent
Explanation:
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