The halogens are:...

The halogens are:

transiton elements

inner-transition elements

noble elements

representative elemets

Text Solution

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The correct Answer is:

`s`-block and `p`-block elements collectively comprise the representative elements. The valence shell electronic configuration of halogen is `ns^(2) n^(5)` and the last electron enters in `p`-subshell. Thus, halogens belongs to `p`-block elements.

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When H_2S reacts with halogens, halogens are

Oxidised

Reduced

Form sulphur halides

None of these

Assertion : All halogens are coloured. Reason : The halogens absorb visible light .

If both the assertion and reason are true and reason is correct explanation of the assertion .

If both the assertion and reason are true but reason is not a correct explanation of the assertion .

If the assertion is true but the reason is false.

If both assertion and reason are false.

IE of halogens are

`FgtCIgtBrgtI`

`CIgtFgtBrgtI`

`CIgtBrgtIgtF`

`CIgtBrgtFgtI`