Sodium chloride gives a golden yellow flame in a Bunsen burner. What can be inferred from this?

The metal that is extracted from sea water is

Why does lithium show anomalous behavior?

Which one of the following reacts with concentrated sulphuric acid?

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R:$
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:

The atomic radii of the alkali metals follow the order