1.

Which of the following statements is not correct regarding hydrogen:

Answer»

It resembles halogen in some of the properties
It resembles with alkali metals in some properties
It can not be placed in first GROUP of periodic table
It is the lightest element

Solution :HYDROGEN has + 1 OXIDATION STATE in compounds with more electronegative elements e.g. HF. It has - 1 oxidation state in compounds with more electropositive compounds like NaH.


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