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प्रश्न
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
विकल्प
hydrogen
helium
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उत्तर
An example of a monoatomic molecule is helium.
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संबंधित प्रश्न
Differentiate between:
Homogenous and heterogenous substances
Name: a non-metal which is lustrous
Find the atomicity of the Following molecule:
Aluminium Suiphide
Fill in the blank
_________ refers to the number of atoms in the molecule of an element
Tick (√) the correct alternative from the choice given for the following statement.
Sugar is a compound which consists of the elements
The diagram represents fractional distillation for the separation of mixtures. Answer the following :
- Can two immiscible liquids be separated by this process?
- Separation of liquids by this process is based on which physical property?
- If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
- Give a reason for the above answer.
- State the purpose of the fractionating column in the apparatus.
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.
The first letter of an element is always written in ______ letter.
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.
