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प्रश्न
Give reason:
Alkali metals and halogens do not occur free in nature.
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उत्तर
Alkali metals and halogens are very reactive; hence, they do not occur in the free state in nature.
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संबंधित प्रश्न
What are the following group known as?
Group 18
Name the method by which alkali metals can be extracted.
Comment on the (i) reactivity (ii) colour (iii) physical state of group 17 elements.
Name the gas used in:
Light bulbs
Give reason:
Alkali metals are kept in an inert solvent.
Give reason:
Inert gases do not form compounds.
Write a short note on the following type of element –
halogens
‘The periodic table contains elements methodically grouped together’.
Select the correct answer from the options given below.
The most reactive halogen from group 17.
State the following:
The group whose elements are unreactive or inert.
