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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
Fill in the blank
A pure substance has definite.................. and constant ..............
Name the technique that you use if only the solid component of a solution is required.
Give one example for the following types of mixtures:
liquid-gas homogenous mixture
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Sand
Name: a non-metal which is lustrous
Give two examples of the following.
Metals which are soft
Give two examples of the following.
Inert gases
Give reason: A frying pan is made up of steel but its handle is made up of wood.
Fill in the blank
A metal which is a liquid at room temperature is _______.
Select the correct answer from the choice given below.
The type of molecule- bromine
State four differences between – elements, compounds and mixtures with suitable examples.
Give an example of two liquids which form homogenous.
Give an example of two liquids that form heterogeneous mixtures.
Select the correct answer from the choice given below to complete the sentence :
Compounds are ____________ in nature.
Non-metal conducting electricity :______ :: Metal conducting electricity : Copper
Elements : Combine to form compounds :: Compounds : ______.
Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal other than carbon that shows allotropy.
