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प्रश्न
Give a reason for the following statement:
Components in a mixture are present in varying proportions and not in a fixed proportion.
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उत्तर
A mixture is an impure substance containing more than one element or compound, mechanically mixed together in any proportion and the mixture retains the properties of its constituents i.e. elements or compounds.
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संबंधित प्रश्न
Define the term: Element
Name: a Liquid Metal
Give two examples of Metals.
Give reason: Graphite is used to make a lead of the pencils.
Indicate whether the following statement is true or false:
Metals reflect light and are good conductors of electricity
Select the correct answer from the choice given below.
A group of atoms of elements
Write the names of elements from the following symbol:
Ti
Write the names of elements from the following symbol:
Ir
Explain the difference between Atoms and molecules.
‘An atom is the basic unit of an element’. Draw a diagram of an atom – divisible as seen today.
‘The modern periodic table consists of elements arranged according to their increasing atomic numbers’. With reference to elements with atomic numbers 1 to 20 only in the periodic table – differentiate them into – metallic elements, metalloids, non-metals & noble gases.
Explain the term ‘mixture’.
Give an example of two liquids which form homogenous.
Select the correct answer from A, B, C, D & E for the statement given below :
A metalloid.
Give a reason for the following statement :
The filter paper made into a cone & placed in a funnel for filtering out the solid particles in a solid-liquid mixture should be moistened before placing it.
Elements are the______ form of pure substances.
Classify the following as metals, non-metals and metalloids.
Sodium, Bismuth, Silver, Nitrogen, Silicon, Carbon, Chlorine, Iron, Copper
Differentiate between elements and compounds.
Give two example of elements.
Name the process associated with the following
A fine beam of light entering through a small hole in a dark room illuminates the particles in its paths.
