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प्रश्न
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – two coloured gases (with their colours)
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उत्तर
(i) Chlorine – greenish-yellow
(ii) Nitrogen dioxide – reddish brown.
संबंधित प्रश्न
Give two examples of the following.
Inert gases
Tick (√) the correct alternative from the choice given for the following statement
The hardest naturally occurring substance
Select the correct answer from the choice given below.
The type of molecule- bromine
Write the names of elements from the following symbol:
Fe
Explain the difference between Atoms and molecules.
Select the correct answer to the statement given below:
A metalloid
Select the correct answer from A, B, C, D & E for the statement given below :
A mixture consisting of elements & a compound.
Atoms: Fundamental particle of an element::______ : Fundamental particles of a compound.
Differentiate between elements and compounds.
Assertion: Air is a mixture of elements only.
Reason: Only nitrogen, oxygen and neon gases exist in air.
