Justify the placement of hydrogen in the group of alkali metals with the help of reaction with halogens.

Question

Justify the placement of hydrogen in the group of alkali metals with the help of reaction with halogens.

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

i. Hydrogen on reaction with halogens (X₂) give compounds with general formula HX.

e.g. H₂+ Cl₂ → 2HCl

ii. Similarly, alkali metals (M) on reaction with halogens (X₂) give compounds with general formula MX.

e.g. 2Na + Cl₂ → 2NaCl

iii. Thus, H₂ and alkali metals are monovalent elements and more electropositive than halogens. This similarity justifies the position of hydrogen in the group 1.