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