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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
विकल्प
the same physical state
the same colour
the same composition
a definite set of properties
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उत्तर
a definite set of properties
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संबंधित प्रश्न
Give one example for the following type of mixtures
solid-solid homogenous mixture.
Differentiate between the following.
Filter Paper and Alum
What are the different types of mixtures ?
Define: Molecule
Name: A form of carbon used as a gem
Complete the statement given below by filling in the blanks with the correct words.
From the elements – He, Br, Pt, and O; the element which is metallic is ____, an inert element is ____, forms a triatomic molecule is ____, is liquid at room temperature is_ ___.
Select the correct answer from the choice given below.
An element which is a poor conductor of heat
Elements are broadly classified into metals and non-metals. State six general differences in the physical properties of metals and non-metals. State two metals and two non-metals which contradict with the general physical properties – giving reasons. State one difference in property between metalloids and noble gases.
Classify the following as elements and compounds.
Water, Common salt, Sugar, Carbon dioxide, Iodine and Lithium
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.
