On treatment with cold water, an element `(A)` reacted quietly liberating a colourless, odourless gas `(B)` and a basic solution `(C )`. Lithium reacted with `(B)` yielding a solid product `(D)` which effervesced with water to give a stongly basic solution `(E)` and gas `(F)`. When `CO_(2)` was bubbled through solution `(C )`, initially a white ppt. `(G)` was formed, but this redissolved forming solution `(H)` when more `CO_(2)` was passed, precipitate `(G)` effervesced when moistened with conc `HCl` and gave a brick red colouration to the bunsen flame. When `(G)` was heated with carbon at `1000^(@)C`, a caustic white compound `(I)` was formed, which when heated with `N_(20` at `1000^(@)C` gave a solid `(J)` of some commercial importance. Identify `(A)` to `(J)` and explain the reactions.

On treatment with cold water, an element `(A)` reacted quietly liberat

1.	On treatment with cold water, an element `(A)` reacted quietly liberating a colourless, odourless gas `(B)` and a basic solution `(C )`. Lithium reacted with `(B)` yielding a solid product `(D)` which effervesced with water to give a stongly basic solution `(E)` and gas `(F)`. When `CO_(2)` was bubbled through solution `(C )`, initially a white ppt. `(G)` was formed, but this redissolved forming solution `(H)` when more `CO_(2)` was passed, precipitate `(G)` effervesced when moistened with conc `HCl` and gave a brick red colouration to the bunsen flame. When `(G)` was heated with carbon at `1000^(@)C`, a caustic white compound `(I)` was formed, which when heated with `N_(20` at `1000^(@)C` gave a solid `(J)` of some commercial importance. Identify `(A)` to `(J)` and explain the reactions.
Answer» `underset("Element")(Given, (A))+H_(2)Orarrunderset(gas)underset("odourless")underset("Colourless",)(B)+underset("Solution")underset("Basic")(C )` `Li+(B)rarrunderset("Solid product")(D)` `(D)+H_(2)Orarrunderset("Solution")underset("basic")underset("Strogly")(E)+(F)_(Gas)` `(C )+CO_(2(g))rarrunderset("White ppt".)((G))overset(CO_(2))(rarr)underset("Solution")underset("to give a")underset("redissolved")underset("White ppt".)((H))` `(G)+"conc" HClrarr{:("Effevescence produced" and),("gave brick red colouration"),("to Bunshen flame".):}` `(G)+"Carbon"` `overset(1000^(@)C)(rarr)underset("Compound")underset("white")underset("Caustic")((I)) overset(N_(2))underset(1000^(@)C)(rarr) underset("importance")underset("commercial")underset("Solid having")((J))` Solution: Since `(G)`gives brick red colouration to Bunshen flame it seems `(A)` is calcium. `underset((A))(Ca)+2H_(2)Orarrunderset("Basic solution")underset((C))(Ca(OH)_(2))+underset((B))(H_(2))` `2Li+underset((B))(H_(2))rarrunderset((D))(LiH_((s))` `LiH_((s))underset((D))+H_(2)Orarrunderset((G))(LiOH)+H_(2)` `underset((G))(CaCO_(3))+CO_(2)+H_(2)OrarrCaunderset(H)((HCO_(3))_(2))` `underset((G))(CaCO_(3))+underset(conc)(2HCl)rarrCaCl_(2)+H_(2)O+CO_(2)uarr` `underset((G))(CaCO_(3))+4Coverset(1000^(@)C)(rarr)underset((I))(CaC_(2))+3CO` `underset((G))(CaCO_(3))+4Coverset(1000^(@)C)(rarr)underset(I)(CaC_(2))+3CO` `underset((I))(CaC_(2))+N_(2)rarrunderset("Nitrolim")underset((J))(CaCN_((2))+C`

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