Why alkalis are very good reagents?

Dear Student,
Alkali metal are those  substance which loses one electron to gain stability are said to be oxidised substance and so alkali metal substance are referred as good reagent.  In a redox reaction, alkali metal which is a reducing agent loses electron to the oxidising agent. 
Regards

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The process of gaining electrons is called reduction. A substance which loses or gives electrons would be a good reducing agent. So, becz alkali metals are gud at losing electrons since they have only one valence electron which can be easily removed ,they are gud reducing agents                                                                            this was there in my txt book
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