MCQ
Which of the following elements is most metallic
- APhosphorus
- BArsenic
- CAntimony
- ✓Bismuth
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Assertion $A:$ Metallic sodium dissolves in liquid ammonia giving a deep blue solution, which is paramagnetic.
Reason $R:$ The deep blue solution is due to the formation of amide.
In the light of the above statements, choose the correct answer from the options given below :
reagents ' $X$ ' and ' $Y$ ' respectively are:

